Pump staying on at night. Faulty PCB relay or HPA2 m/switch - or ?

[Dmitri]

Thanks Murdoch. Pic attached - hope it gets thro' OK. I have a multimeter.

 

[Dmitri]

If the boiler is controlling the pump then it's going to be something internal to the boiler that's telling it to run so your going to need to get yourself a gas safe engineer.

Thanks DGT. Msg rec'd & understood

 

[Dmitri]

Had several from experience it's the pcb otherwise the boiler would fire up It's a motorised valve

Please.... so is it the PCB or the motzed valve that's at fault?

 

[Riley]

You won’t get the answer you’re looking for as we will not give advice potentially leading to diy gas work. Please see forum rules

 

[ShaunCorbs]

If just the pump is running frost stat / pipe stat more than likely

 

[Dmitri]

You won’t get the answer you’re looking for as we will not give advice potentially leading to diy gas work. Please see forum rules

Not planning on any DIY. Having just spent £400+ on boiler, just wanting to know likely cost to correct the pump problem. A new PCB is a much bigger expense than a new HPA2 valve.

 

[Dmitri]

If just the pump is running frost stat / pipe stat more than likely

Don't have a frost stat - thanks anyway

 

[Riley]

If you’ve already spent £400 I’d look at getting shot mate

 

[Harvest Fields]

If you’ve already spent £400 I’d look at getting shot mate

Your joking. It’s an investment now

 

[Dmitri]

Your joking. It’s an investment now

Tend to agree Harvest. Another £50 for a valve (if this is the problem) versus £2.5k-£3k for a new boiler (say Worcester Bosch?) would be worth it. That's why I asked the Q in the first place.

 

[Riley]

But if it’s not just a valve then the boiler becomes uneconomical.

 

[Harvest Fields]

So they need an engineer to diagnose properly. Then they go from there.

 

[Dmitri]

So they need an engineer to diagnose properly. Then they go from there.

Roger that Harvest. At least it was worth trying to get a diagnosis via the Forum. Thanks everybody for chipping in.