P High

Dimplex P Fault Code

The Dimplex P fault code means: your boiler is struggling to operate because it isn't receiving enough electrical power or is failing to detect a flame.. It appears on 1 Dimplex model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Error in power supply / No flame - Low mains voltage
Typical repair cost £100-280 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Dimplex models that show the P fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Dimplex P fault code information on this page is sourced and cross-checked against the official Dimplex service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026