thanks for all the help and info above, i got the fan and fitted it adnd we now have central heating again but sadly no hot water.
as soon as i turned the boiler back on the fan started turning so that confirms our old one was def no good.
now tho we have no hot water. doesnt matter if the...
i looked into this a while ago when we got our 2 kittens, iirc you can swap the panel in the door for one with a cat flap in it.
not sure how expensive they are but that was some adivce i got at the time.
well i found someone on ebay selling reconditioned ones for £42.55 plus postage, the pic is exactly the same as the one i had removed from ours.
new they seemed to be £180+
well i think it's been in about 10 years, we have been there 6 years, it was done before we moved in but other than this there havent been any problems with it.
and atm i cannot afford to replace it, hopefully for the sake of a £50 fan it will run a while longer yet.
thank you.
tbh i only checked the fan because that's what seemed to have been getting noisier.
i havent opened any other covers or anything. i have had the fan off now so i guess any seals that could have been damaged will have been by now anyway so i may as well order a new fan then i...
it worked until Friday night, i while i was in the bath it seemed to go off. ( boiler is in the bathroom).
it has been making a strange noise for a week or so, as if the fan was getting louder. i opened it up to see if any obvious blockages and the fan in the top right hand corner seemed ok...