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this is what happens. Any ideas most likely cause. Burner locks out. I press the reset and can hear the fan is not spinning. I remove the burner and fan cover to check motor isn’t seized. It’s not and I spin the fan by hand put back together press reset and it fires and heats up correctly. When...

Hello. Burner immediately trips the rccb when call for heat is initiated. Circulation pump and other wet side components are not causing this as work fine when boiler power is off. An earth leak in the burner but any ideas how I find out what exactly, or what is most likely to cause this. Boiler...

Burner generally works but locks out at random times on restart when hot and cold. When locked out it sometimes restarts after pressing burner reset button, but not always. When locked out the motor/fan doesn’t even start to spin before burner locks out again. It seems that gently tapping the...