CH pump remains on

[180turbo]

Hi.

Wonder if anyone can point me in the right direction please, even though we know roughly what the problem is.

We have a Baxi Solo 3 PFL poiler, controlled by a Danfoss CP 715.

In normal use after the boiler goes off (timer stops on the 715) you can hear the CH pump working for 5 minutes then it turns off.

Now after the boiler goes off, when the timer finishes, the pump stays on.

We had british gas cover 6 years ago and the same happend then, so the guy change the PCB and all was fine.

So i'm guessing 'the PCB' has gone again. The only way to stop it running it to turn off the mains switch to the pump and CP715 (they must both be controlled through it.

Is PCB something i can replace myself, or does it require a corgi registered engineer to fix it? Anyone know roughly how much to replace it?

Many Thanks.
Paul

 

[lightning]

Faulty 2 or 3 port valve

Paul

 

[TCCHeating]

Faulty 2 or 3 port valve

Paul

Not if the boiler turns off.

Sounds like a Faulty pcb. The pump is controlled by the pcb for overrun.

You need a gs registered engineer to change it

 

[180turbo]

Yes the boiler does turn off. It'll be the 2nd PCB, Not sure how long they last in general but they are not cheap.

Would be ok i guess if we didn't notice it running all night in the background when its very quiet.

Does the PCB need programming via a laptop to set the parameters?

 

[bazdaman]

Defo pcb