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my mistake that must have been the air pressure valve

Cheers Chris I took the pipes of the water pressure switch and blew in it I can hear a flap moving, I'm guessing that means its working ???

Morning all I checked resistance but I'm non the wiser with the solenoid removed and the multimeter set at 200 kiloms I get a reading of 1.8, with it reconnected to the circuit board but not connected to the gas flow it does not operate on ignition sequence. (service valve on gas flow pipe...

Cheers Agile I guess measuring resistance at the soleniod is a simple job once you know how. I take it I'm looking for a figure in OHMS :? I know anything to do with gas is a CORGI job, I did not actually measure the gas pressure but as far as i'm aware it has not changed.

Cheers Mate I will check if power is getting to the valve but unless I'm being dumb I cannot see that gas pressure to the boiler would have changed and gas pressure to the rest of the house is fine.

Any advice on this would be more than welcome My Vaillant turbomax is not igniting after a water leak near it got it pretty wet (no water got in to the circuit board housing) It was working normally before this, following info might help: Green power light on CH light on Fan...