Medium
57 on Johnson Starley C26d

Your heater has automatically shut down to prevent itself from overheating and becoming too hot.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

In order to limit the warm air temperature the heater will shut off the burner and Lt will be displayed in the centre of the display. This will be stored as error 57.

DIY fix possible

Check all warm air grilles and vents around the home to ensure they are open and not blocked by furniture.Inspect the air filter on the unit; if it is dusty or clogged, clean or replace it.Switch the electricity supply to the heater off and back on again to reset the fault.

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