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Glow-worm Fuelsaver Mk2 - Pilot light won't stay lit?

Hi all,

I have the same boiler as Glen (Mk2 30B, 4131304) and seem to be in pretty much the exact same situation.

Re: http://www.howtomendit.com/answers.php?id=49618

I have replaced so far:

New t/c - no effect (£5)
New o/h stat- no effect (£38)

Could the problem be the t/c that is used for sensing the water temp of the system for the stat on the front of the boiler?

If it is the gas valve - Curzon do the 24v~ one (blue connector block) for approx £60 and the 240v~ (black connector block) for about £10 more, both with a grey knob - is there any way of verifying that gas valve is not working? If so how?

I can hear mine click as remove and re-connect one of the orange power leads - so i know its not an power supply issue - but the pilot will not stay alight.

I'm trying to avoid wasting any more money on the problem and would like to know if that is possible.

Any help greatly appreciated.

Regards

David
December 2006

Glow-Worm Heating, Home Heating Systems Glowworm Fuelsaver Light

Pilot light wont stay on, can you help

Dave Griffiths
March 2011

go for thermocouple first doddle to change you dont have to touch combustion chamber

robi robinson
March 2008

Number one... The Fuelsaver MK2 is balanced flue, which means to change the thermocouple or overheat stat requires removal of the combustion chamber which should only be done by a registered CORGI Engineer as per the Gas Safety Act 1998.

Number two... Yes, the gas valve can be checked (To a limit)... The gas valves on these use an electro magnet which, after time does loose it's ability to stay first off, ensure you are using a high quality thermocouple; long life ones will usually conduct the voltage much better, then try linking out the overheat stat FOR TESTING PURPOSES ONLY (Do not leave it unattended whilst linked out) to ensure that the overheat stat is not causing any additional resistance to the conducting circuit.

Check and clean the pilot, make sure the injector is clear of any debris and that the pilot is of adequate size and is fully playing on the thermocouple tip...

If; after a 20sec waiting period the gas valve is not holding open, you will need to make arrangements to have it changed and the new one setup...

I do beg people not to try and skimp on gas fittings, we know they're not cheap... But these things can kill if done incorrectly.

GasAid.co.uk
December 2006