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pilot wont stay alight. new honywell gas valve ,and tc fitted last week boiler working fine. occupants had a chip pan fire next to boiler very hot heat and smoke. pilot wont stay lit now tryed another tc still no joy suspect gas valve. before i go down that line again any other ideas would be...

bar dial on baxi combi ok when heating/dhw is operating maintains pressure but when switched off pressure drops to 0 after about 20 mins.checked dump valve its ok? checked leakes from rads ok. any ideas please

i have a worcester combi boiler 35cdi mk2. central heating ok but hw fires on and off and fan runs on off , on off , any ideas welcome +++++++++ I have edited your "subject" hope this is more meaningful. Mod R +++++++++

spark but pilot will not ignight ?. spark stops when heat applied to pilot by lighter.

glow worm safe energy 65-75 wont fire up doesnt even try to ignite. power to unit but no power from pcb to gas valve.

when the boiler is switched on it fails to operate. if you leave it in the on position it will operate on its own the next day. ?

thorn m80/100b boiler. the pilot light will ignite but as soon as i lift the button it goes out. any answers please