am sure these work on negative ie the fans suck the air pressure switch into a closed position cheak the tube that connects from the fan to the APS
is not blocked with anything.
this is being sorted by my gas man, but it is a bugger of a boiler and he has changed a gas valve already.
E34 and 33 have popped up recently. Now it is the E33 code.
The tenant has said the water is not as hot as it should be, but the boiler is now firing back up on its own and she doesnt have to keep doing it manually.
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