by plastic_man77 »
Sat Jan 29, 2011 8:30 pm
Don't know the particular boiler you have had installed. I don't understand why the rads need bleeding either- is this just so you can reduce the pressure in the system or do you get air out and improve the problems you are having?
Does the pressure slowly rise if you don't have the heating on- in which case it could be a faulty filling loop- passing mains water in to the heating system.
If this is not the case it could be another part of the boiler, where mains water and heating water are is close proximity, such as the plate heat exchanger, and mains water could be leaching through a failed component or seal, thus slowly increasing the system pressure.
Don't know about the noises, it could be part of the same thing, depending on how high the pressure rises. Does it get to 3 bar?
To me, the obvious thing would be to call your installer, he double checks his work, if he's left scratching his head- call the boiler manufacturer out under warranty to assess the problem. If their product is at fault they will pay for the repair. But, if you get charged for something your installer has caused, send him the bill.
Incidently- uneven heating is probably down to balancing, not the boiler, and, are the noises coming from the boiler or the radiators? If it's the rads, did you have rad thermostats fitted before the work was carried out and are they bi-directional? If you already had TRVs installed and they aren't bi-directional, then the flow and return pipes may have been swapped over during the new installation, causing the valve to chatter. The quickest cure is to swap the flow and return back over at the boiler. Alternatively, buy some bi-directional TRVs and have them fitted.
