Boiler pressure rising?
The pressure in our gas boiler keeps rising. I've bled the radiators which brings it down temporarily. The top up valve is tightly closed so I can't figure out where the water is getting in.
Advice from 9 local tradespeople
Possible expansion vessel problem or it could just be a slight inlet off the cold supply to the heating system via the filling loop.
ADHS PLUMBING & HEATING
Hi there could be a number of things , the expansion vessel could need charging or replacing
It could be your exspaion vessel has lost its air and needs to be pumped back up. or there could be a split/pin hole in it.
The filling loop could be passing or a problem with the expansion vessel
Sounds like your having a over heating issue or the filling loop is letting water by.. things to be checked,
Pump
Vessel
Blockage
Both heat exchangers
Filling loop
By law you are not allowed to remove the case from the boiler. the fault on this is inside the boiler so you need somone who is gas safe sorry.
Exspanstion or filling loop book a boilee service
Expansion vessel in boiler, common problem.
Pressure vessel may need recharging. System could be blocked. System could be overheating
