BoilerFaultCodes Pump overrun thermostat fault High
Boiler Fault Code Pump overrun thermostat fault
Also written as PUMPOVERRUNTHERMOSTATFAULT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Pump overrun thermostat fault appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a faulty component that usually helps cool the system down after it finishes running, meaning it may stop working to prevent overheating. (As reported on Potterton Profile 30E)
Pick your boiler brand for the Pump overrun thermostat fault fix
Source
Information for the Pump overrun thermostat fault 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 27 April 2026