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Plumbing & Plumbers Forum - Glow worm ultracom 18hxi-occasional 100 degrees/boil
Glow worm ultracom 18hxi-occasional 100 degrees/boil
Discuss Glow worm ultracom 18hxi-occasional 100 degrees/boil in the Central Heating Forum at Plumbers Forums; Hi everyone Thought I'd run this problem past you guys in case someone has come across it before. Basically my boiler is heating my tank up fine, but occasionally when ...-
07-10-2011 #1New to Plumbing Forum
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Glow worm ultracom 18hxi-occasional 100 degrees/boil
Hi everyone
Thought I'd run this problem past you guys in case someone has come across it before. Basically my boiler is heating my tank up fine, but occasionally when the stat is not calling for heat the boiler fires up. Within a few seconds the temperature races up to around the 100 degree mark and then switches off ( and making a bit more noise whilst doing so). The boiler is not showing a fault code. I imagine this is not doing the boiler any good. I guess that an inevitable call to Glow worm is in order.
Thanks for reading
Dave
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07-10-2011 #2Top Plumbing Forum Contributor
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Re: Glow worm ultracom 18hxi-occasional 100 degrees/boil
diverter is stuck or sticking. Think 100degrees may be a bit beyond what I've ever witnessed, Give BG a ring, they'll be cheaper
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07-10-2011 #3Plumbers Arms member
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Re: Glow worm ultracom 18hxi-occasional 100 degrees/boil
Or get a local GSR engineer in they will be cheaper than Glowworm or BG.
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08-10-2011 #4Top Plumbing Forum Contributor
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Re: Glow worm ultracom 18hxi-occasional 100 degrees/boil
You say that but where there's expensive parts to fit or heat exchangers etc.. but a hundred and odd quid for a first fix (lol!) wouldn't be a bad deal
Originally Posted by armourer
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09-12-2011 #5New to Plumbing Forum
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Re: Glow worm ultracom 18hxi-occasional 100 degrees/boil
glowworm 18hxi f4 Fault - any ideas?
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09-12-2011 #6UK Plumbersforums Trusted Advisor.
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Re: Glow worm ultracom 18hxi-occasional 100 degrees/boil
F4 is ignition lockout jayh1969 Originally Posted by jayh1969
... Lots of possible causes on that one .... Only thing you can do is make sure you haven't ran out of gas or accidently turned off the main control valve next to the meter 
"Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. THAT'S relativity." Albert Einstein
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