Vaillant Turbomax VUW 242E not firing

Dod · 3 Jan 2007

I took a shower yesterday morning and the boiler fired up as usual. Later in the day I flicked the time clock to constant for central heating and it failed to ignite. It no longer worked for just hot water either.

The electronic ignition is working fine; the fan kicks in; the water pressure is where it should be; the problem is, there doesn't seem to be any gas reaching the boiler.

Any suggestions?

dan the man · 5 Jan 2007

check power to the gas valve..is it opening?

is the burner clean?

cross thread · 5 Jan 2007

can you hear it sparking? is the lockout switch out? ( small black button on the front)

Dod · 5 Jan 2007

The burner looks clean. I don't know where the gas valve is. I haven't located an explanatory diagram for this boiler, unfortunately. I can't locate the lockout switch either - I don't see any small black button on the front. I can certainly hear and see it sparking, though.

Agile · 6 Jan 2007

Probably the internal o/h stat!

Tony

newcomers · 6 Jan 2007

Dod said:
The burner looks clean. I don't know where the gas valve is. I haven't located an explanatory diagram for this boiler, unfortunately. I can't locate the lockout switch either - I don't see any small black button on the front. I can certainly hear and see it sparking, though.

Sounds like the gas valve to me

kevplumb · 6 Jan 2007

Agile said:
Probably the internal o/h stat!

Tony

your prob right

DOD

if you look underneath the boiler it's on the right behind the dhw/hex covered in a white plastic cap

remove cap press botton

Agile · 6 Jan 2007

Better to look on the left !!!

On the flow pipe!

You can press to reset through the plastic cover.

Tony

kevplumb · 6 Jan 2007

ok tony i will give you that one

Dod · 6 Jan 2007

If it's the transparent rubbery cover, like a mini babies bottle nipple, with a couple of wires going to it, I pressed that a few times. I couldn't hear or feel an actual 'click', as if I'd reset anything.

No change to the 'non firing situation' afterwards!

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Vaillant Turbomax VUW 242E not firing

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