Non starting Potterton boiler

[cliffhangar]

I have a Potterton PrimaB HFG conventional boiler which has suddenly decided it doesn't want to light. The flue fan appears to be working (I can hear it start and stop when switching either heating or hot water on/off). The pump also appears to work (the pipe below the pump is warm, presumably heated by pilot light, before heating turned on but rapidly gets cold after switching on). I spoke to a plumber over the phone and, after explaining the symptoms, he suggested that the flow diverter valve might be faulty. I purchased a new valve but am having second thoughts about fitting it (it cost £82) until I can be sure that this is the problem. I am no expert, but it seems to me that if the pump is pumping, thus water flowing and the fan is working, that perhaps the problem is not with the diverter valve.
Can anyone help me.

 

[gas4you]

Check the air pressure switch. Unless this proves the fan spinning then the boiler won't try to ignite.

Also check the pipes from the fan to the aps, could also be the fan venturi partially blocked.

 

[cliffhangar]

Thanks for the reply Dave. I am somewhat of a novice to boiler maintenance and do not know where the aps is or how to check it when I have located it.



Mark

 

[gas4you]

Unfortunately the safest answer is to call a reputable corgi in then

Several on here who post cover your area. Look them up in their profiles.

 

[Agile]

I have a Potterton PrimaB HFG conventional boiler

I cannot quite immagine what this model is but surely its not a combi with a diverter valve?

In any case the fault is a gas/combustion related problem. All the province of a CORGI engineer.

Tony

 

[solo]

Ha Ha. Tried to pick some blokes' brains over the phone and ended up forking out for a part he may not need. Love it. Tightwad

 

[cliffhangar]

Thanks Tony and Dave for your constructive comments and I shall now call in a corgi engineer. It is a conventional gravity fed boiler probably 15+ years old and not a combi.

As for the reply from solo, I called a heating engineer to try to arrange a visit and the 'bloke', who told me he could not work because he had injured his back, encouraged me to explain the sympoms and kindly offered me his advice. No wonder you're solo. D***head.

 

[solo]

ha ha ha ha ha ha ha