Glow worm 30ci no DHW but CH ok

nickname · 5 Apr 2010

Hi to everyone.This is my first post,so...
I have problem with my Glow worm 30ci. ch working fine.When i open hot water tap boiler fires up but after 10-15 sec cuts off and red light and f9 flashes. When CH is on boiler working fine but when i open the hot water tap it cuts off after 10 sec and the water from tap is warm. I checked manual and F9 means water pressure sensor fault. Is this wright?

combispecialist · 5 Apr 2010

thats correct but ive also had f9 when the thermistor was out of range.get an rgi to have a look

nickname · 5 Apr 2010

Thanks for the reply.
Checked the boiler again and 3 way valve making quite big noise. Is it common problem on those boilers?

mickyg · 5 Apr 2010

Depends on the age of the boiler what the F9 represents. On older models it was a global fault. ie could be anything. Given the fault condition I'd be checking the DV and plate HE.

nickname · 6 Apr 2010

The boiler is about 7 years old. My friend plumber is coming tomorrow to look at it. Hope he will fix it.

Andygasman2010 · 6 Apr 2010

mickyg said:
Depends on the age of the boiler what the F9 represents. On older models it was a global fault. ie could be anything. Given the fault condition I'd be checking the DV and plate HE.

As above, on older versions of the PCB on this boiler F9 was related to overheat. Probably a blocked plate

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Glow worm 30ci no DHW but CH ok

nickname

combispecialist

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mickyg

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Andygasman2010

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