Boiler help - Glow worm 18hxi boiler randomly fires up

14
Found 31st Mar 2015
Boiler help - Glow worm 18hxi boiler randomly fires up, despite no call for heat. LCD screen will go to 71 then switch off. Probably does this once every few hours. Boiler is working fine just curious if this should be happening, new house and other neighbours experiencing same thing but never experienced this before with any other boilers.
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14 Comments
It may have a water preheat setting enabled. That means it will fire up now and again to ensure your hot water is available from the tap quickly.
moob

It may have a water preheat setting enabled. That means it will fire up … It may have a water preheat setting enabled. That means it will fire up now and again to ensure your hot water is available from the tap quickly.


How can you turn this off, do you know?
That's a regular boiler so it doesn't preheat hot water.

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themorgatron

That's a regular boiler so it doesn't preheat hot water.

yes it's not a Combi-boiler
nwressell

How can you turn this off, do you know?



It's called the manual

glow-worm.co.uk/glo…pdf

Alternatively call their customer service people 01773 828100, probably your best bet to getting a clear and safe answer about what's up with it.


Edited by: "Astec123" 31st Mar 2015

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Astec123

It's called the manual … It's called the manual ;)http://www.glow-worm.co.uk/glow-worm/hxi-range-157210.pdfAlternatively call their customer service people 01773 828100, probably your best bet to getting a clear and safe answer about what's up with it.

cheeky chops I've tried the manual no joy, was wondering if anyone on here experienced the same as have called helpline and they were not very helpful and said they would need to charge a call out to see it
Have you tried adjusting the temperature dial to see if the number changes, 71 could be the flow temperature (although doesn't explain the random firing). Also try drawing off lots of hot water with hot water programme off to check it doesn't still call for heat at the boiler, (or just turn the hot water stat up)

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themorgatron

Have you tried adjusting the temperature dial to see if the number … Have you tried adjusting the temperature dial to see if the number changes, 71 could be the flow temperature (although doesn't explain the random firing). Also try drawing off lots of hot water with hot water programme off to check it doesn't still call for heat at the boiler, (or just turn the hot water stat up)

where is the hot water stat usually?
nwressell

Comment where is the hot water stat usually?



If you have an unvented cylinder it will be white box about 1/3rd up from bottom, small dial that can be easily rotated. Older foam/copper cylinders are similar but need a screwdriver to adjust. Just remember the temp it was set to and put it back afterwards.
Found it and adjusted it and no call
For heat, was set around 60
I would call Glow-worm up again and ask for technical, you can normally get through to someone with half a brain.
when your boiler goes funny its most likely in need of repair things like this should work as expected not as they wish
Sounds like the frost stat which is built into the system. Easiest and cheapest option is to link it out but you will need a controls tech. or electrician to do this for you. Call the service/repair centre and see what the guy who turns up has to say, some are as thick as two short planks, others are very good and ask him what a stat would cost you and is it better to just link it out. If the boiler is in your house working of a room stat then the temperature inside is never going to drop to the frost setting anyway, so in a home it is pointless.
Edited by: "059" 1st Apr 2015

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059

Sounds like the frost stat which is built into the system. Easiest and … Sounds like the frost stat which is built into the system. Easiest and cheapest option is to link it out but you will need a controls tech. or electrician to do this for you. Call the service/repair centre and see what the guy who turns up has to say, some are as thick as two short planks, others are very good and ask him what a stat would cost you and is it better to just link it out. If the boiler is in your house working of a room stat then the temperature inside is never going to drop to the frost setting anyway, so in a home it is pointless.

we have the Hive system so the frost stat is built into that so we already have this then don't we?
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