Our gas boiler has decided of course that this is the week to breakdownIt's an Ideal Mexico Super CF4120, this is a floor standing open flued boiler, it's a pretty basic boiler with nothing in the way of fancy electronics. The only control is water temp thermostat.When required to fire up, it has a pilot ignited by a spark , which then lights the mian burner.So it stopped lighting up. Though I could hear the spark clicking.As I've done a couple of times before when this happened removed the burner unit and gas the pilot light burner and igniter a good clean and blow out with a compressed air can. Unfortunately this did not sort the problem :-(The gas valve is one of these.I've tested the solenoid resistance on the left with my cheapo multimeter at it is showing open circuit , so has presumably failed. Are there any other checks I should do?. Or is that pretty conclusive? I don't know much about the gas valves, does the solenoid control the flow of gas to the pilot as well?Thanks (and glad to see some old faces still here :-))

Sounds it.Mine's a permanent pilot, and yes the solenoid valve supplies it (controlled by thermocouple) ... hope my gas valve keeps hanging on in there ...

Gas boiler not lighting - Gas valve?

Dec 17, 2020 Last reply: 5 years ago 22 Replies

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Chris French 5 years ago

I was talking rubbish, there is a screw lurking at the bottom of the hole.

Actually, in the end it came out easily enough, witht he stilsons.

Then I noticed that the indie of the union on the other end had an allen key fitting, for one of those big allen keys.

Back together, and now working :-)

Household harmony resumes.

Thanks for your help John

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Chris French 5 years ago

I did look a bit to see if I could get the solenoid , but I couldn't find one, and it's winter and we are all at home. Just wanted it fixed :-)

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Chris French 5 years ago

Yep, mine was like that, once I looked more closely :-)

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