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kevplumb Hi yes when trying to light it tries to go through the ignition sequence and the pilot light will light spark goes off and burner will relight then go out straight away.

Chris R thanks for this help The main burner will run for varying lenghts of time, from 30 secs to full burn upto room temperature. It seems the hotter the boiler becomes the harder it becomes to relight. Sometimes when the boiler reaches the room stat setting, it will relight when the room...

Chris R many thanks have done as you suggested. I have now got to this situation where the main burner will light but will cut off after a short while. Does this sound like the boiler thermostat? i'm not having to reset any overheat thermostat but i'm stumpeed now for ideas. mick33

hi thanks for the reply, very rapid response. I have checked the pump by removing the front screw and the pump is running. I have also checked out the wiring for the pump, 3 way valve and controller but still no joy. I cheated the system by switchhing on the imersion over night and then...

Hi there in need of some help I have a potterton prima30f gas boiler and have come home tonight to no hot water or heating. I have looked to check that the timer and stats are all set correctly and that there are no obvious leaks. The expansion tank is full. The pump runs and the boiler is...