A TIG welding machine that suddenly refuses to start can be frustrating, especially when you need to complete fabrication, stainless-steel welding, aluminium welding, maintenance work, or production jobs. A TIG machine may appear completely dead, power on but produce no welding output, display an error, trip the breaker, or start normally and then shut down when welding is attempted.

The important thing is that “my TIG welding machine won’t start” can describe several different faults. The problem may be as simple as a disconnected power cable or incorrect switch position, or it may involve the machine’s power supply, control board, inverter circuit, IGBT modules, cooling system, gas control circuit, torch trigger, high-frequency ignition system, or internal protection circuit.

For professional diagnosis, avoid repeatedly switching a faulty machine on and off. TIG welding machines contain high-voltage DC circuits and capacitors that can retain dangerous electrical energy even after the machine has been disconnected from the mains.

TIG WELDING MACHINE REPAIR AND TROUBLESHOOTING IN NAIROBI

If your TIG welding machine is not starting, the first step is to establish exactly what happens when you switch it on. Does nothing happen at all? Does the cooling fan run? Does the display illuminate? Does the machine show an error code? Does it immediately trip the breaker? Does it start but refuse to create an arc?

These observations help narrow the fault considerably.

A professional TIG welding machine repair technician can inspect the machine systematically instead of replacing components unnecessarily. At Pro-Logic Technologies Limited, TIG welding equipment can be assessed for electrical, electronic, inverter, control and welding-output faults.

1. WHAT DOES “TIG WELDING MACHINE WON’T START” ACTUALLY MEAN?

Before troubleshooting, distinguish between several conditions.

CONDITION ONE: COMPLETELY DEAD

You switch on the machine and:

No display
No indicator light
No fan
No sound
No response from controls

This usually points toward the incoming power supply, fuse, switch, power cable, rectifier, auxiliary power supply, or primary control circuit.

CONDITION TWO: DISPLAY COMES ON BUT MACHINE DOES NOT WELD

The machine powers up normally, but pressing the torch trigger does not produce welding current.

Possible causes include:

Incorrect welding mode
Faulty torch switch
Broken trigger cable
Faulty control board
No gas command
Protection circuit active
Output-stage fault
Incorrect settings
HF ignition failure
Foot pedal/control problem

CONDITION THREE: MACHINE STARTS THEN SHUTS DOWN

This can indicate:

Overheating
Short circuit
Excessive input current
Internal component failure
Cooling fan failure
Blocked ventilation
IGBT fault
DC bus problem
Control-board protection

CONDITION FOUR: MACHINE TRIPS THE BREAKER

This requires particular attention.

A breaker that trips immediately when the TIG machine is switched on can indicate:

Shorted input rectifier
Failed power transistor
Damaged IGBT
Shorted capacitor
Input wiring fault
Internal short circuit
Incorrect supply voltage
Serious power-stage failure

Do not repeatedly reset the breaker and attempt to start the machine. Repeated attempts can make an existing fault worse.

2. CHECK THE POWER SUPPLY FIRST

The most basic cause of a TIG machine failing to start is lack of correct input power.

Before opening the machine, check the external electrical supply.

The wall socket, isolator, extension cable, plug, circuit breaker and distribution board should all be inspected.

A TIG welding machine may require substantial current, particularly when operating at higher welding amperages. Using an undersized extension cable can cause voltage drop, overheating and machine malfunction.

For example, a machine designed for a stable 220–240 V supply may behave abnormally when connected through a poor-quality extension cable with significant voltage drop.

Check whether:

The socket has power.
The circuit breaker is on.
The isolator is on.
The plug is properly inserted.
The machine's power switch is functioning.
The power cable is intact.
There are no loose terminals.
The supply voltage is appropriate for the machine.

If you are not qualified to measure mains voltage, have an electrician or qualified technician perform the measurement.

3. CHECK THE TIG MACHINE POWER CABLE

A damaged power cable can prevent the entire machine from starting.

Inspect the cable for:

Cuts
Burn marks
Melted insulation
Loose connections
Broken conductors
Damaged plug
Signs of overheating
Exposed wires

Welding environments can be harsh. Cables may be dragged across workshop floors, exposed to heat, crushed under equipment or damaged by metal fabrication activities.

A cable may also appear physically normal while having an internal conductor break.

Professional technicians can test cable continuity and connection integrity using appropriate test equipment.

4. CHECK THE MAIN POWER SWITCH

The main power switch is another common point of failure.

If the switch contacts have burned or become damaged, the machine may receive no power even though the external supply is available.

A faulty switch may show symptoms such as:

Machine works intermittently.
Machine starts when the switch is moved repeatedly.
Display flickers.
Machine shuts down when the switch is touched.
Machine remains completely dead.

A switch should not simply be bypassed as a permanent repair. The correct replacement should be installed according to the manufacturer's electrical specifications.

5. CHECK THE INPUT FUSE

Many TIG welding machines contain one or more protective fuses.

A blown fuse can make a machine completely dead.

However, do not simply replace a blown fuse with another fuse and assume the problem is solved.

A fuse normally blows because excessive current has occurred.

The underlying cause may be:

Shorted rectifier
Failed IGBT
Shorted capacitor
Power-supply fault
Wiring problem
Surge damage
Component failure

If a replacement fuse immediately blows, stop operating the machine and have the power section diagnosed.

6. CHECK THE CIRCUIT BREAKER

The workshop circuit breaker should also be checked.

Sometimes the machine itself is fine and the problem is external.

Possible causes include:

Overloaded circuit
Weak breaker
Incorrect breaker rating
Short circuit
Loose wiring
Excessive machine startup current
Multiple machines sharing one circuit

A TIG welding machine should have an appropriately designed electrical supply.

Do not increase the breaker rating simply because it keeps tripping. The breaker is protecting the wiring and equipment.

7. CHECK WHETHER THE MACHINE HAS THE CORRECT INPUT VOLTAGE

Some welding machines are designed for:

220–240 V single phase
380–415 V three phase
Dual-voltage operation
Specific voltage ranges

Connecting a machine to the wrong supply can cause severe damage.

For example, a machine intended for a lower voltage supply may suffer catastrophic power-stage damage if exposed to a substantially higher voltage.

Always check the machine's rating plate.

Look for information such as:

Input Voltage:
Phase:
Frequency:
Input Current:
Duty Cycle:
Output Current:

If the machine has a voltage selector, it must be configured correctly before operation.

8. TIG MACHINE POWER ON BUT NO DISPLAY

If the machine receives mains power but the front display remains dark, the fault may be inside the machine.

Potential areas include:

Auxiliary power supply
Control-board supply
Internal fuse
Rectifier
Switching power supply
Control PCB
Loose connectors
Damaged low-voltage regulator
Failed standby circuit

Modern inverter TIG machines commonly contain several stages.

A simplified structure is:

AC INPUT → RECTIFIER → DC BUS → INVERTER → HIGH-FREQUENCY TRANSFORMER → OUTPUT RECTIFIER/CONTROL → WELDING OUTPUT

The control electronics require their own low-voltage supply.

If that supply is missing, the machine can remain completely inactive even though mains voltage reaches the machine.

9. FAULTY AUXILIARY POWER SUPPLY

The auxiliary power supply is particularly important.

It provides operating voltages for:

Control boards
Displays
Relays
Cooling fans
Sensors
Gate-drive circuits
Gas solenoid controls
Protection circuits

If the auxiliary supply fails, the TIG machine may appear dead.

Common failures include:

Burned switching components
Failed PWM controller
Damaged startup resistor
Shorted diode
Failed electrolytic capacitor
Transformer failure
Damaged regulator
Cracked solder joint

Repairing this section requires electronics knowledge and proper test equipment.

10. CHECK THE COOLING FAN

The cooling system is essential in an inverter TIG welding machine.

The fan helps remove heat from:

IGBTs
Diodes
Heat sinks
Transformers
Power resistors
Other power components

Some TIG machines perform a startup check involving the fan or temperature sensors.

A failed fan may cause:

Overheating
Thermal shutdown
Error indication
Reduced duty cycle
Machine shutdown
Welding output interruption

If the machine has a fan that should operate during startup but remains stationary, this should be investigated.

Do not assume every TIG machine fan must run continuously; fan operation varies between designs.

11. OVERHEATING CAN PREVENT TIG STARTUP

If the machine was previously operating at high current, it may have entered thermal protection.

Typical causes include:

Long welding periods
Excessive amperage
Blocked ventilation
Dust accumulation
Failed fan
Hot workshop environment
Damaged temperature sensor
Poor heat transfer

The machine may display a thermal warning or temporarily disable output.

Allow the machine to cool naturally and ensure that ventilation openings are not blocked.

If it repeatedly overheats under normal operating conditions, professional inspection is recommended.

12. DIRTY TIG MACHINE INTERNALS

Welding workshops generate significant dust and metal particles.

Over time, dust can accumulate inside the machine.

Heavy contamination may affect:

Cooling
Fan performance
Insulation
Connectors
Circuit boards
Heat dissipation

Conductive contamination can sometimes contribute to leakage paths or electrical faults.

Regular professional cleaning and maintenance can extend the service life of welding equipment.

Compressed air should also be used carefully because excessive pressure can damage delicate components or force contamination deeper into sensitive areas.

13. FAULTY IGBT MODULES

Many modern TIG inverter machines use IGBTs in their power-conversion stage.

IGBT means:

Insulated Gate Bipolar Transistor.

These components switch high electrical power at high frequency.

A failed IGBT can cause:

Machine not starting
Input breaker tripping
Blown fuse
No welding output
Abnormal noise
Burn marks
Repeated component failure

IGBT failure may occur because of:

Overcurrent
Overheating
Voltage spikes
Poor cooling
Short circuits
Incorrect repair
Component ageing

If an IGBT fails, replacing only the visibly damaged transistor may not be sufficient. The associated gate-drive circuit and other power components should also be checked.

14. FAILED BRIDGE RECTIFIER

The input bridge rectifier converts incoming AC into DC.

If the bridge rectifier fails, the machine may:

Remain dead
Blow its fuse
Trip the breaker
Produce unusual electrical noise
Fail to charge the DC bus

A shorted bridge rectifier is a serious power-stage fault.

Technicians can test rectifier junctions using appropriate diagnostic methods after ensuring the machine is safely isolated and discharged.

15. DC BUS CAPACITOR PROBLEMS

The rectified DC supply is commonly smoothed by large electrolytic capacitors.

These capacitors are important because they store electrical energy.

A damaged capacitor can produce:

Bulging
Leakage
Reduced capacitance
High ESR
Excessive ripple
Startup problems
Power-stage instability

A TIG welding machine may still appear to have some signs of life while having a serious DC bus problem.

Because capacitors can retain dangerous charge, they should only be inspected or serviced by appropriately trained personnel.

16. PRE-CHARGE CIRCUIT FAILURE

Some inverter welding machines use a pre-charge arrangement to control the initial charging current of the DC bus capacitors.

Components may include:

Resistors
Relays
Contactors
Control circuitry

If the pre-charge circuit fails, the machine may:

Fail to initialize
Trip protection
Blow fuses
Produce relay clicking
Remain in standby

A professional diagnosis should determine whether the problem lies in the pre-charge circuit or elsewhere in the primary power system.

17. CONTROL BOARD FAILURE

The control PCB is effectively the brain of the TIG welding machine.

It may manage:

Welding current
Pulse frequency
Gas timing
HF ignition
Arc control
Thermal protection
Overcurrent protection
Fan control
Digital display
Remote control
Foot pedal input

If the control board develops a fault, the machine may power on but fail to operate correctly.

Possible symptoms include:

Frozen display
Incorrect readings
Buttons not responding
Error codes
No welding output
Random shutdown
No gas activation
No HF ignition

18. TORCH TRIGGER PROBLEMS

If the machine powers on but does not begin welding when you press the TIG torch trigger, inspect the torch control circuit.

The torch trigger usually tells the machine to begin its welding sequence.

A broken trigger cable can make the machine appear faulty.

Possible problems include:

Broken trigger wire
Loose connector
Damaged torch plug
Faulty trigger switch
Corrosion
Poor contact

The torch should be tested before assuming the main welding machine has failed.

19. FOOT PEDAL PROBLEMS

Some TIG machines use a foot pedal to control welding current.

A defective foot pedal can cause startup problems or prevent welding current from being delivered.

Check:

Pedal connection
Cable
Connector
Potentiometer
Control settings
Remote mode selection

Some machines have to be configured for torch control versus remote/foot-pedal control.

If the machine is set incorrectly, pressing the torch switch may produce no expected response.

20. WRONG TIG MODE

A surprisingly common problem is incorrect machine configuration.

Depending on the machine, you may have options such as:

TIG
MMA
Pulse TIG
HF TIG
Lift TIG

If the machine is set to a mode that does not correspond to your torch and setup, it may not behave as expected.

Check the front-panel settings before concluding that the machine is defective.

21. HF IGNITION FAILURE

High-frequency ignition is a key feature in many TIG welding machines.

HF helps initiate the arc without requiring the tungsten electrode to physically touch the workpiece.

A machine may power on normally but fail to establish an arc because the HF circuit is faulty.

Potential problems include:

HF board failure
Spark-gap problems
High-voltage transformer
Capacitor
Relay
Wiring
Torch connection
Poor grounding

HF circuits generate high voltage and should not be serviced casually.

22. POOR OR MISSING EARTH CONNECTION

A proper work return connection is essential for welding.

Check the:

Work clamp
Work lead
Connection point
Cable
Terminal
Metal contact surface

Paint, rust, dirt or heavy oxidation can prevent good electrical contact.

The work clamp should make solid contact with suitable conductive material.

23. TIG GAS SUPPLY PROBLEMS

Gas problems do not always prevent the machine itself from powering on, but they can make the TIG system appear not to work.

TIG welding generally requires shielding gas such as argon.

Check:

Cylinder valve
Regulator
Gas hose
Solenoid
Torch connection
Gas flow setting

If pressing the torch trigger does not produce the expected gas flow, the problem could involve the solenoid, control circuit, torch switch or gas supply.

Never use oxygen or another inappropriate gas as a substitute for the required shielding gas.

24. FAULTY GAS SOLENOID

The gas solenoid electrically controls gas flow in many TIG systems.

A defective solenoid may be:

Stuck closed
Stuck open
Electrically open
Electrically shorted
Mechanically contaminated

A machine may start but fail to provide shielding gas.

This can result in poor weld quality and tungsten contamination.

25. TIG MACHINE SHOWING AN ERROR CODE

Modern TIG machines often display fault codes.

Do not ignore an error code.

The code may indicate:

Over-temperature
Overcurrent
Input-voltage problem
Output short circuit
Fan fault
Control communication fault
Sensor fault
Internal protection

The exact meaning depends on the manufacturer and model.

Record the code before switching the machine off if possible. A technician can use that information during diagnosis.

26. INTERNAL CONNECTORS CAN CAUSE STARTUP FAILURE

Welding machines contain many connectors between:

Control PCB
Display
Power PCB
Gate drivers
Sensors
Fan
Solenoid
Transformer
Output terminals

Vibration and heat cycles can contribute to loose or oxidized connections.

A loose connector may cause intermittent operation.

Typical symptoms include:

Machine works sometimes
Machine stops after vibration
Display disappears
Fan stops
Error code appears randomly
Welding output cuts out

Professional servicing includes inspection of critical connectors and wiring.

27. CRACKED SOLDER JOINTS

Repeated heating and cooling can stress solder joints.

This can happen around:

Transformers
Relays
Power resistors
Connectors
Heavy-current terminals
Large components

A cracked solder joint may cause intermittent faults.

However, simply resoldering every suspicious point is not a proper diagnostic procedure. The underlying electrical fault should first be established.

28. DAMAGED RELAYS

Relays are used in some TIG machines for switching electrical circuits.

A relay may fail because of:

Contact wear
Coil failure
Overheating
Mechanical damage
Electrical arcing

A failed relay can prevent a power sequence from completing.

You may hear repeated clicking without the machine actually becoming operational.

29. INPUT SURGE DAMAGE

Power surges can damage inverter welding machines.

Surges may originate from:

Utility disturbances
Lightning
Generator problems
Incorrect electrical connections
Switching large industrial loads

Surge damage may affect:

MOVs
Rectifiers
IGBTs
Control boards
Capacitors
Auxiliary supplies

If the machine stopped working immediately after a major electrical event, tell the technician.

That information can significantly narrow the diagnostic process.

30. GENERATOR POWER CAN CAUSE PROBLEMS

Some welding machines are operated from generators.

An unsuitable generator can produce:

Voltage fluctuations
Frequency instability
Poor waveform
Insufficient capacity

These conditions can cause sensitive electronic equipment to malfunction or become damaged.

If the TIG machine works from one electrical source but not another, compare the supplies rather than immediately replacing machine components.

31. EXTENSION CABLE PROBLEMS

Using a very long or undersized extension cable can cause voltage drop.

Symptoms may include:

Machine struggling to start
Output instability
Excessive cable heating
Breaker trips
Reduced welding performance

For high-current equipment, electrical installation should be appropriately designed for the machine's rated input current and cable length.

32. WHY TIG MACHINES FAIL AFTER LONG USE

TIG welding machines operate under demanding conditions.

Common long-term causes include:

Heat stress
Dust
Moisture
Electrical surges
Component ageing
Fan wear
Capacitor ageing
Connector oxidation
Repeated overloading
Poor maintenance

Regular maintenance can reduce the likelihood of sudden failure.

33. TIG MACHINE THAT STARTS BUT HAS NO ARC

Suppose the machine turns on and the display is normal but no arc is produced.

The technician should investigate:

Welding mode.
Torch trigger.
Work clamp.
Welding leads.
Tungsten setup.
Gas flow.
HF ignition.
Output current.
Control PCB.
Power stage.

This is different from a completely dead machine and requires a different diagnostic pathway.

34. TIG MACHINE OUTPUT TRANSFORMER PROBLEMS

In inverter TIG machines, high-frequency transformers transfer power between the primary and secondary sides.

Problems may include:

Winding damage
Insulation breakdown
Overheating
Loose connections
Core damage

Transformer faults can cause loss of welding output or serious power-stage problems.

35. OUTPUT RECTIFIER PROBLEMS

The output section converts the high-frequency electrical energy into suitable welding current.

Damaged output diodes or associated components can result in:

No output
Low output
Excessive heating
Short circuit
Protection activation

This area requires proper electronic testing.

36. WHY PROFESSIONAL TIG MACHINE REPAIR IS IMPORTANT

A TIG inverter is not simply a box containing a transformer.

Modern units combine:

Power electronics
Digital controls
Sensors
High-frequency switching
Thermal management
Protection systems
High-voltage circuits
Welding-current control

Replacing random components can become expensive and may cause additional damage.

A proper repair process should begin with diagnosis.

37. SAFE BASIC CHECKS YOU CAN PERFORM

Before taking the machine for repair, you can safely check external items such as:

Is the wall socket powered?
Is the breaker switched on?
Is the machine's power switch on?
Is the plug correctly connected?
Is the power cable visibly damaged?
Is the machine connected to the correct supply?
Is the ventilation blocked?
Is there an obvious error code?
Is the work clamp properly connected?
Is the torch properly connected?

Avoid opening the machine unless you are trained and equipped to work safely with high-voltage electronics.

38. WHAT YOU SHOULD NOT DO

Do not:

Bypass protective devices.
Replace fuses with oversized fuses.
Short circuit protection circuits.
Touch charged capacitors.
Work inside the machine while connected to mains.
Continue operating a machine that smells burnt.
Keep resetting a breaker that repeatedly trips.
Spray water into the machine.
Randomly replace IGBTs.
Bypass the cooling system.
Ignore error codes.

These actions can create a serious safety hazard and can turn a repairable machine into a much more expensive failure.

39. PROFESSIONAL TIG WELDING MACHINE DIAGNOSIS

A proper workshop diagnosis may include:

VISUAL INSPECTION

The technician checks:

Burn marks
Loose wires
Damaged components
Dust
Corrosion
Broken connectors
PCB damage

INPUT TESTING

The incoming supply and machine input circuitry are evaluated.

POWER SUPPLY TESTING

Internal auxiliary supplies are checked.

DC BUS TESTING

The primary rectification and capacitor system are examined.

INVERTER TESTING

IGBTs and associated circuits are evaluated.

CONTROL CIRCUIT TESTING

The controller, sensors and gate-drive circuits are inspected.

OUTPUT TESTING

The welding output stage is tested.

FUNCTIONAL TESTING

After repair, the machine should be tested under appropriate operating conditions.

40. TIG MACHINE REPAIR IN NAIROBI

If your TIG welding machine has stopped working in Nairobi, professional diagnosis can help determine whether the problem is related to the power supply, control system, inverter section, welding output, cooling system or torch interface.

Pro-Logic Technologies Limited provides electrical and electronic equipment repair services and can assist with diagnosis of welding equipment and related industrial electronics.

The workshop is associated with Luthuli Avenue, Kangari Building, 3rd Floor, KA7, Nairobi CBD, where various electrical and electronic equipment repair services are handled.

Services may include diagnosis and repair of:

TIG welding machines
MIG welding machines
MMA welding machines
Inverter welders
Industrial welding equipment
Welding machine control boards
Welding machine power boards
IGBT inverter sections
Welding machine cooling systems
Welding machine electrical faults

41. TIG WELDING MACHINE REPAIR FOR WORKSHOPS

For fabrication workshops, a failed welding machine can interrupt production.

A TIG machine may be required for:

Stainless-steel fabrication
Aluminium fabrication
Food-grade equipment
Automotive work
Pipe fabrication
Precision fabrication
Sheet-metal work
Industrial maintenance
Artistic metalwork

A machine that refuses to start can therefore affect the entire workflow.

Fast diagnosis is important, but repairs should never compromise electrical safety.

42. TIG MACHINE MAINTENANCE

Preventive maintenance can reduce failures.

Recommended practices include:

Keep ventilation openings clear.
Keep the machine dry.
Avoid excessive dust accumulation.
Inspect cables regularly.
Check connectors.
Avoid overloading.
Observe the rated duty cycle.
Maintain adequate ventilation.
Protect equipment from water.
Use the correct electrical supply.
Inspect cooling fans.
Keep welding leads in good condition.

43. DUTY CYCLE AND MACHINE OVERLOAD

Every welding machine has a rated duty cycle.

For example, a machine may be specified to operate at a certain welding current for a percentage of a defined time period.

If the machine is continuously operated beyond its rated duty cycle, heat builds up.

This can cause:

Thermal protection
Reduced output
Component degradation
Fan operation
Premature failure

Always follow the manufacturer's duty-cycle specifications.

44. TIG MACHINE REPAIR FOR INDUSTRIAL APPLICATIONS

Industrial TIG welding equipment may require more extensive troubleshooting because the system can be integrated with:

Foot controls
Automation
Welding positioners
Cooling systems
Gas systems
Remote controls
CNC equipment
Production lines

A fault in an external control system may sometimes appear to be a fault in the welding machine.

Therefore, diagnosis should consider the complete welding setup.

45. COMMON QUESTIONS ABOUT TIG MACHINES THAT WON’T START

WHY IS MY TIG WELDER COMPLETELY DEAD?

Possible causes include loss of input power, damaged power cable, blown fuse, faulty switch, auxiliary power supply failure, rectifier fault or control-board failure.

WHY DOES MY TIG MACHINE TURN ON BUT NOT WELD?

Possible causes include torch-trigger problems, incorrect settings, output-stage faults, HF ignition problems, protection activation or control-board issues.

WHY DOES MY TIG WELDER KEEP TRIPPING THE BREAKER?

A serious internal short circuit, damaged rectifier, IGBT failure or other power-stage fault may be responsible.

WHY DOES MY TIG MACHINE OVERHEAT?

Blocked ventilation, excessive duty cycle, failed fan, high ambient temperature or internal component problems can cause overheating.

WHY IS MY TIG MACHINE DISPLAY WORKING BUT THERE IS NO ARC?

The control electronics may be operating while the welding output stage, HF circuit, torch circuit or power stage has a fault.

CAN A TIG WELDING MACHINE BE REPAIRED?

Yes. Many TIG welding-machine faults are repairable, depending on the machine design, component availability and extent of damage.

46. WHEN SHOULD YOU STOP USING THE TIG MACHINE?

Stop using the machine immediately if you notice:

Burning smell
Smoke
Sparks inside the cabinet
Repeated breaker trips
Unusual buzzing
Severe overheating
Melted cables
Repeated fuse failure
Electrical shock
Visible PCB burning
Abnormal output

Continuing to operate the equipment can increase the damage.

47. TIG WELDING MACHINE REPAIR AND ELECTRONIC COMPONENT REPLACEMENT

A professional repair may involve replacement of individual components rather than replacing the entire machine.

Depending on the diagnosis, components may include:

IGBTs
Diodes
Capacitors
Resistors
Relays
Rectifiers
Cooling fans
Sensors
Connectors
Switches
Control boards
Power boards

The correct component must match the electrical and thermal requirements of the original design.

48. TIG MACHINE SPARE PARTS

Availability of spare parts can influence repair decisions.

Common replacement items include:

Welding torches
Torch switches
Welding cables
Work clamps
Cooling fans
Control boards
Power boards
IGBT modules
Rectifiers
Capacitors
Gas solenoids
Connectors

Before purchasing a replacement board or module, identify the exact welding machine model and board number.

49. WHY RANDOM ONLINE REPAIR GUIDES CAN BE RISKY

Two TIG welding machines may look similar but have completely different electronic designs.

A repair method suitable for one machine may be inappropriate for another.

Differences may include:

Input voltage
IGBT configuration
Gate-drive architecture
Control-board design
Protection system
Output topology
HF circuit
Sensor arrangement

Therefore, model-specific troubleshooting is preferable.

50. TIG WELDING MACHINE REPAIR IN KENYA

Pro-Logic Technologies Limited can be contacted for electrical and electronic equipment troubleshooting and repair services in Nairobi and surrounding areas.

For welding-machine repair, provide as much information as possible, including:

Machine brand

Model number

Input voltage

Welding current rating

Fault symptoms

Error code

Whether the machine was exposed to a power surge

Whether the machine was recently overloaded

Whether it trips the breaker

Whether the display comes on

This information makes diagnosis more efficient.

51. AREAS SERVED

TIG welding-machine repair and related electrical/electronic services can be relevant to customers in:

Nairobi CBD
Luthuli Avenue
Industrial Area
Westlands
Ngong Road
Kilimani
Lavington
Karen
Runda
Kasarani
Roysambu
Embakasi
Donholm
Umoja
Ruai
Kangemi
Kikuyu
Kiambu
Thika
Ruiru
Limuru
Ngong
Machakos
Nakuru
Kisumu
Other parts of Kenya

For locations outside Nairobi, service arrangements can depend on the equipment and nature of the fault.

52. PRO-LOGIC TECHNOLOGIES LIMITED TIG WELDING MACHINE REPAIR

When a TIG welding machine will not start, the most important thing is to identify which stage of the machine has failed.

A completely dead machine is investigated differently from a machine that powers on but has no arc.

Likewise, a machine that trips the breaker requires a different approach from one displaying a thermal warning.

A professional repair assessment can help determine whether the fault is caused by:

Input power

Power switch

Fuse

Rectifier

DC bus

Capacitors

IGBT inverter

Auxiliary power supply

Control PCB

Gate-driver circuit

Cooling system

Torch trigger

HF ignition

Gas solenoid

Output stage

Protection circuit

Understanding the difference prevents unnecessary replacement of expensive parts.

CONCLUSION

If your TIG welding machine won't start, do not immediately assume that the entire machine is damaged. The fault could be external, such as a failed socket, breaker, power cable or incorrect supply. It could also be an internal electronic problem involving the auxiliary power supply, rectifier, DC bus, IGBTs, control board, cooling system, HF ignition or welding-output circuit.

Start with safe external checks. Confirm that the machine is receiving the correct electrical supply, inspect the power cable and switch, check the breaker, look for error codes and ensure the ventilation is not blocked.

If the machine is completely dead, repeatedly trips the breaker, smells burnt, produces smoke, or has suffered a suspected electrical surge, stop attempting to restart it. Internal inverter welding equipment can contain hazardous stored electrical energy, and diagnosis of the high-voltage sections should be carried out by a suitably trained technician.

For professional TIG welding machine repair, inverter welding machine repair, welding-machine electronics diagnosis, IGBT repair, control-board troubleshooting and related electrical equipment services in Nairobi, Pro-Logic Technologies Limited can assess the machine and determine the appropriate repair approach.

Pro-Logic Technologies Limited
Luthuli Avenue, Kangari Building, 3rd Floor, KA7, Nairobi CBD
Email: info@prologictechnologies.co.ke
Website: prologictecnologies.co.ke

Whether your TIG machine is completely dead, powers on without producing an arc, keeps tripping the breaker, overheats, displays an error, fails to ignite the arc, or stops during welding, proper fault diagnosis is the best starting point before replacing expensive components.

TIG WELDING MACHINE NOT STARTING? GET THE FAULT DIAGNOSED BEFORE REPLACING PARTS.