Whining from Combi boiler after replacing a radiator.

[rwade]

Boiler Model: Biasi 28s

Problem: Loud whining sound coming from Combi boiler. Not all the time but a majority of the time when either heating is on or hot water is running. Noise suddenly stops when power to boiler is cut.

This has only started shortly after I replaced a bathroom radiator and valves. System was drained and then radiator and valves were removed and replaced with a new. Refilled system till pressure read 1.5bar and blead all radiators and repeated 3 or 4 times. Pressure was rising to 2-2.5bar so turned off and emptied system to 0.5bar and now heating and hot water works fine with pressure rising to 1.5bar when in use.

Issue seems to be getting worse.

Any advice or infomation would be really appreciated.

Thanks, Richard.

 

[JCplumb]

Systems are often noisy for a couple of days after being drained down, unless the noise is worrying you just wait a couple of days and it should die down.
If there are manual air vents or an external pump make sure you bleed them aswell as the radiators.
0.5 bar is too low, you should be at 1.0 bar when the system is cold.

 

[IDCHAPPY]

Your expansion vessel is probably seen better days too, pressure gains during the heating cycle should be minimal if it's going up by 1 bar the charge in the vessel should be looked at

 

[diamondgas]

rwade :welcome: Best advice would be to get someone in to give advice. Noise can be heat related or mechanical. Try turning the control stat down see if the noise disappears. That'd indicate heat related.

 

[stevetheplumber]

its normally the customer whining when they get the bill

 

[rwade]

Thanks for the advice guys, really appreciate it but I think I'll get a professional in to have a look, just wanted to see if it was something obvious.

 

[Ermintrude]

idiotic advice removed.

Are you for real? To do this the op would need to play with his boiler? Not really in keeping with forum rules is this?

 

[wetdrip]

Boiler Model: Biasi 28s

Problem: Loud whining sound coming from Combi boiler. Not all the time but a majority of the time when either heating is on or hot water is running. Noise suddenly stops when power to boiler is cut.

This has only started shortly after I replaced a bathroom radiator and valves. System was drained and then radiator and valves were removed and replaced with a new. Refilled system till pressure read 1.5bar and blead all radiators and repeated 3 or 4 times. Pressure was rising to 2-2.5bar so turned off and emptied system to 0.5bar and now heating and hot water works fine with pressure rising to 1.5bar when in use.

Issue seems to be getting worse.

Any advice or infomation would be really appreciated.

Thanks, Richard.

Did you add inhibitor thereafter?