Dimplex Overheating Electrical Component or Insulation

Boiler emits a burning smell or plastic smell during operation

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

Overheating Dimplex pump motor, Failing Dimplex PCB component, Loose electrical connection causing arcing, Foreign object touching hot flue or casing

How to Fix / Troubleshooting

Safety first: If you smell burning plastic or see smoke, switch off power immediately and do not use the boiler until inspected.

User checks:

Visual inspection: Without removing sealed combustion covers, look around the boiler for any foreign objects or melted plastic near the casing or flue.
Listen for unusual noises: A noisy Dimplex pump or fan combined with smell suggests motor failure.

Professional repair:

Inspect internal wiring, Dimplex PCB, pump, and fan for overheating or damage.
Replace any burnt components and rectify loose connections.

Repair Difficulty

Hard 4/5

Required Part

Dimplex main control PCB

Check Price on Amazon

We may earn a commission from links on this page.