How much does it cost to fix boiler error code LOW POWER SUPPLY FROM MAINS?

Typical repair cost for the boiler LOW POWER SUPPLY FROM MAINS fault is £180-450 including labour.

LOW POWER SUPPLY FROM MAINS High

Boiler Fault Code LOW POWER SUPPLY FROM MAINS

Also written as LOWPOWERSUPPLYFROMMAINS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LOW POWER SUPPLY FROM MAINS 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 is not receiving the correct amount of electricity from your home's power supply to run safely and has shut down as a precaution. (As reported on Johnson Starley J32 System ET)

Pick your boiler brand for the LOW POWER SUPPLY FROM MAINS fix

Johnson Starley LOW POWER SUPPLY FROM MAINS 1 model

Source

Information for the LOW POWER SUPPLY FROM MAINS 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