Baxi 80 eco

[ard1]

Hello all, my boiler named above is constantly over pressureing and hence bleeding outside down the wall. At first i thought maybe it was due to the manual top up valve leaking so i have replaced and the problem continues. I have read on here that there is a pressure unit onboard but upon inspection of the boiler i cant find it. is this located in the same area as the pump as thats the only bleed point i could find.

Any help would be great

 

[scatmanjohn]

You need a new plate heat exchanger.

 

[ard1]

is this the only way of fixing it? as i can see the exchanger at the back. Do you mean that it is blocked? and thats where the preasure is coming from?

 

[namsag]

It means water from cold mains side is passing into heating side .

Empty the boiler, 2 screws 5 mins gets part out and in ,part about 40 quid dead simple job

 

[baxpoti]

Replace the 4 seals as well. Prt Nos. 248049

 

[ard1]

best places to get a heat exchanger? ive found online plumbing supplies are they any good?

 

[Agile]

Just before you rush out, does this happen all the time even though the boiler is not being used?

If so then fine! If not then ask again.

Tony

 

[ard1]

yep afraid so, even when the boiler is completly off, and the amount of water ive bleed from the radiators to bring it down would fill the system several times

 

[namsag]

gas appliance spares preston 01772702755 list price 30 quid plus vat washers are about 2 quid each but to be honest there not usually needed

 

[ard1]

Replace the 4 seals as well. Prt Nos. 248049

is this the part number for the exchanger or the seals, as ive found two heat exchangers with numbers either side of this?