BoilerFaultCodes
The most common Protherm faults
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the tap or taps on the filling loop until you hear water flowing.Watch the pressure gauge until it reaches between 1.0 and 1.5 bar, then close the taps fully.
Your boiler has failed to light or has lost its flame, so it has shut down for safety purposes.
Check if your gas meter has credit and the gas supply to the house is turned onCheck if other gas appliances in your home, like a hob, are working correctlyPress the reset button on the front of the boiler to try and restart it
Your boiler is not receiving any electrical power, which could be due to a tripped switch or an internal fuse failure.
Check if your home's main fuse box has tripped a circuit breaker.Ensure the boiler's isolation switch (fused spur) is turned on.Try replacing the 3-amp fuse in the external boiler switch if you are comfortable doing so.
Your boiler has shut down because it has detected it is getting too hot, likely triggered by a safety switch to prevent damage.
Turn off the power supply to the boiler.Allow the boiler to cool down completely for at least 20 minutes.Locate the reset button (usually behind the small plastic cover or on the control panel) and press it firmly.Restart the boiler and check if the radiators are bled of air.
Your boiler has stopped working because it cannot correctly measure the temperature of the water inside the pipes.
Full guide for 100EC F2Your boiler is unable to circulate water properly through its internal heating system, causing it to shut down for safety.
Full guide for 100EC F3Your boiler has detected an issue with how it moves air and exhaust gases, which has caused it to stop running for safety.
Full guide for 40-50 CI neon 3 not litYour boiler has failed to light the gas flame or cannot detect that it is lit, so it has shut down as a safety precaution.
Full guide for 40-50 CI neon 4 not litAvoid the next call-out bill
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