Glow Worm Compact 75p not modulating

[MK Heating]

Ive been to a Glow Worm that on both Heating and DHW will run on low light for 5 mins then go off. Took the Covers off, everything freezing cold. Got into the burner, all clean as a whistle, Fired it up for a sec with the covers off, tiny little flame on the burner just as I thought. First guesses are PCB or Gas Valve? Either of these common on these boilers? Ive not come across one until today. Could be one of the thermistors but I was getting good readings from them.

 

[Kev the gas]

Presume you checked the working pressure at the meter and then inlet pressure at the gas valve ??

 

[MK Heating]

Yeah, both fine. Customer has since rang back and requested a price for a new boiler. Result. Still wouldn't mind knowing what peoples opinions are though

 

[Kev the gas]

I have had the pcb doing this before on the compact

 

[zeebeedee]

Changed a pcb on a compact 80e for the same thing the other week.

 

[MK Heating]

Good to hear. I did think that. They have chose to upgrade. There will be a Main 30 in there on thursday.

 

[buckley plumb]

pcb they not cheap - £210 from memory glowworm will do for £260

 

[SafeGasInstall]

pcb they not cheap - £210 from memory glowworm will do for £260

that is half the cost of Main 30he , dont charge too much for install and you will keep them for a customer and se them every year for service

 

[MK Heating]

Sorted her a Main out today, did her a great price on it, was as easy change as could be albeit with a straight vertical flue on a pitched single extension. Fired and flushed for 3 o clock with a chippy dinner. Good job

 

[SafeGasInstall]

Good man