potterton profile 50e?

Hi,

My old Potterton 50e has started to make a grinding noise when in hot water and ch mode. There is also a bit of kettling happening when the boiler is switched off (both modes) It does not sound healthy! Weirdly enough it started to heat only two radiators upstairs when on hot water mode (Central Heating was turned off)
This I guess is not normal - can anyone help?

Cheers,

Si

Simon
August 2009

Thanks everybody for the help, John turned out correct the flue had what looked like dried nettle leaves in it, perhaps a bird trying to make a nest!
its never happened before and the boiler has been there for about 17 years.

Frank Emery
August 2009

if the switch and tubes are ok then the fan isn't producing enough draught to operate the switch, try cleaning the fan impellers.

Ian
August 2009

have you checked the tubes are both clear ?

hi-spec plumbing & heating (essex)
August 2009

I'm only a simple OFTEC man, but if this happens to me the flue needs a clean out...its the air pressure differential that causes the air switch to shut things down.

John
August 2009