Dimplex No Power to Control Electronics

Boiler display is blank but fused spur is on

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

Blown internal fuse on Dimplex PCB, Failed Dimplex power supply module, Loose live/neutral connection at boiler, Faulty fused spur or isolation switch

How to Fix / Troubleshooting

Safety first: Only competent persons should open electrical enclosures. Always isolate power before removing covers.

User checks:

Fused spur: Check and replace the fuse (typically 3A) with the correct rating if blown.
Other appliances: Confirm that the electrical circuit is live by testing another appliance.

Professional repair:

Check incoming voltage at the Dimplex boiler terminals.
Inspect and replace internal fuses or the Dimplex power supply module as needed.

Repair Difficulty

Medium 3/5

Required Part

Dimplex internal power supply / PCB fuse

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