High
LED Flashing on Johnson Starley J32 System ET

Your boiler's internal fan is failing to start or power up, which means the unit cannot safely clear exhaust gases and will refuse to ignite.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

The fan is not connected, or the capacitor is not connected, or there is a short circuit in the fan supply.

From this model's manual
Verified against the ZZ0819 14HI SPECM31INSTALLATIONINSTRUCTIONS installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 23 fault codes on the J32 System ET

Seeing a different code? Every code this model can display, in one place.

ADC LOCKOUTE-01E01E03EEPROM LOCKOUTF-15F15F37F40FALSE FLAME LOCKOUTFAN FAULTFLAME CIRCUIT FAILUREFLOW THERMISTOR FAULTFLOW/RETURN SENSOR DRIFT ERRORIGNITION LOCKOUTLOW POWER SUPPLY FROM MAINSNO DISPLAYOVERHEAT LOCKOUTREMOTE RESET LOCKOUTRETURN THERMISTOR FAULTSENSOR STUCK LOCKOUTVALVE FEED BACK ERROR

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