p/-.- High

Boiler Fault Code p/-.-

Also written as P — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code p/-.- appears across 4 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is signalling an issue with the water pressure level, either because it has become too high or the sensor is failing to read it correctly. (As reported on Worcester Bosch GB162)

Pick your boiler brand for the p/-.- fix

Dimplex p/-.- 1 model Gledhill p/-.- 1 model Halstead p/-.- 1 model Worcester Bosch p/-.- 5 models

Source

Information for the p/-.- fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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