IVT Electrical Overheating / Component Failure

Boiler emits a burning smell or visible smoke from casing

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Overheated PCB, Shorted pump or fan motor, Loose mains connection causing arcing, Foreign object inside casing

How to Fix / Troubleshooting

Critical safety: Immediately turn off power at the isolator and, if safe, at the consumer unit. Do not attempt to restart the boiler. If you see flames, call emergency services.

Steps:

Do not remove the boiler cover until the unit has completely cooled.
A qualified technician should inspect for burnt wiring, PCB damage, or failed motors.
Replace any damaged components (PCB, pump, fan) and rectify the root cause (e.g., seized pump, loose terminal).

Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB

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