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i never use the timer, it's always set in the 1 position, but on the recent occasions that the boiler hasn't started running (whether it fires or not) when the selector is put to CH I have just nudged the timer selector a millimetre and it has jumped into life. Odd. Even then sometimes I have...

any thoughts on this problem, guys? am i right to think it's unlikely to be the pcb since it (the CH) does fire up for an hour or so and always when the water is turned on. Lately it has stayed dead when i turn the switch to the CH position but as soon as I nudge the slider on the timer the...

My vokera linea 726 central heating intermittently doesn't refire after temp reached and it cools. This usually occurs daily though may work okay for several hours and can be refired by opening the hot tap. Then after firing and refiring for another hour or two it may not refire again. It...