Glowworm 18HXi - not again!!

paul-H · 28 Dec 2007

Hi all.

i was having problems with this boiler constantly faulting on F1. Electrode was replaced which appeared to have sorted it short term. Still get occasional F1. (has also shown F4 and F13)

However, this morning was met with F5. Whatever, i do i cant get it to start. I reset the boiler and within seconds its straight to F5.

Any ideas and help....

Paul

wishiwascorgi · 28 Dec 2007

its overheating

wishiwascorgi · 28 Dec 2007

F5 = Boiler overheated. Allow to cool and reset.

It also sounds like you have a pcb problem F13 or that could be a faulty thermistor causing both problems

corgiman · 28 Dec 2007

it has a resettable OH stat within the combustion chamber RGI job I owuld have said , as if its not reset it wont matter how cool the system is it will go to F5.

paul-H · 28 Dec 2007

wishiwascorgi said:
F5 = Boiler overheated. Allow to cool and reset.

It also sounds like you have a pcb problem F13 or that could be a faulty thermistor causing both problems

Thats what i was thinking. Can't be overheating as its going straight to F5 every time.

I cant get hold of anyone and the glowworm number is on answerphone. Just wondered if anyone had any advice on getting it going in the meantime.

corgiman · 28 Dec 2007

paul-H said:
wishiwascorgi said:

F5 = Boiler overheated. Allow to cool and reset.

It also sounds like you have a pcb problem F13 or that could be a faulty thermistor causing both problems

Click to expand...

Thats what i was thinking. Can't be overheating as its going straight to F5 every time.

I cant get hold of anyone and the glowworm number is on answerphone. Just wondered if anyone had any advice on getting it going in the meantime.

See my reply

paul-H · 28 Dec 2007

corgiman said:
it has a resettable OH stat within the combustion chamber RGI job I owuld have said , as if its not reset it wont matter how cool the system is it will go to F5.

I wont touch anything that has a gas valve, burner, or fan attatched to it.

Why put a reset button behind the metal cover panel ?????

wishiwascorgi · 28 Dec 2007

so heating engineers can make a nice profit for a minor job that you need to be corgi reg to legally repair.

corgiman · 28 Dec 2007

paul-H said:
corgiman said:

it has a resettable OH stat within the combustion chamber RGI job I owuld have said , as if its not reset it wont matter how cool the system is it will go to F5.

Click to expand...

I wont touch anything that has a gas valve, burner, or fan attatched to it.

Why put a reset button behind the metal cover panel ?????

so that a competant person can investigate the reasons for the overheating rather than you just keep pressing the button and possibly causing more damage

corgiman · 28 Dec 2007

wishiwascorgi said:
so heating engineers can make a nice profit for a minor job that you need to be corgi reg to legally repair.

see my previous reply

paul-H · 28 Dec 2007

the manual does not show a O/H stat??????

corgiman · 28 Dec 2007

paul-H said:
the manual does not show a O/H stat??????

Well it does have one

corgiman · 28 Dec 2007

I am looking at it on partsarena now

gas4you · 28 Dec 2007

This is a discontinued Vaillant Ecomax Pro.

The overheat stat is top left behind the inner front panel. A little red button.

Only 2 screws hold this panel on then you lift forward and up to remove.

Reset the stat and check whether your pump is set to 3 or maximum and that it is working correctly.

The Vaillant version had a problem with needing a fast flow through it otherwise it could lock out for no serious reason.

Replace inner front cover and try again. This cover is easily re-fitted and self sealing and you do not have to touch any gas parts.

corgiman · 28 Dec 2007

gas4you said:
This is a discontinued Vaillant Ecomax Pro.

The overheat stat is top left behind the inner front panel. A little red button.

Only 2 screws hold this on then you lift forward and up to remove.

Reset the stat and check whether your pump is set to 3 or maximum and that it is working correctly.

The Vaillant version had a problem with needing a fast flow through it otherwise it could lock out for no serious reason.

Replace inner front cover and try again. This cover is easily re-fitted and self sealing and you do not have to touch any gas parts.

You are a lovely fella gas, nicer than me thats for sure

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Glowworm 18HXi - not again!!

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