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Potterton 80e boiler air pressure switch is tripping out?

My 14 year old Potterton 80e boiler air pressure switch is tripping out every 3-4 days due to water (I assume condensation) running in to it from the flue via the red pipe. Once the water is removed and the air pressure switch is re-set it runs fine again for a similar amount of time, at which point I then have to repeat the procedure again. The fan has just been replaced, the gas pressure and the flue for corrosion or perforations have been checked by a qualified engineer and are all ok, but it still does it. The only other symptom is the boiler tends to not always start up from cold the first time, it sometimes hunts and takes 7 or 8 attempts to ignite. When it fires up it runs ok.
Any suggestions what to do next?



Mikey
April 2008


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the flue should not allow water in!
it should have a slight tilt so water does not flow into your boiler and rot it! hence your fan change etc.

The solution here would be to get the inital problem fixed with the flue before addressing anything else.

On that note, all new condensing boiler SHOULD have the flue inclined to allow water & condensate to flow through the boiler, but these are made of stainless and won't rot like yours will

T
April 2008

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Aug 2019


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