I had a Potterton Promax Combi 28HE+ boiler installed in Nov 2011. In Feb 2012 I had a couple of central heating pipes replaced which entailed the system being drained twice. After 2 weeks pipes started vibrating extremely loudly - it sounds like someone drilling through metal and fills the house. The noise starts without warning and comes in pulses i.e. it makes a racket for a few seconds then stops for a few seconds, then it starts again and stops again. Each episode lasts for about 5 minutes in all.
Strangely is this only happens at weekends which could be significant because on Sat/Sun the system is set to come on at 7.30am but 6.30 am Mon-Fri. The noise always happens around 7am. The boiler goes off at 8.30pm every day.
When the boiler comes on it works fine for both heating and hot water although there is an occasional loud bang. All radiators except one have thermostatic valves.
The noise would wake the dead and is driving me mad, and my neighbours with their new baby are not thrilled either. Can anyone suggest what is causing the pipes to vibrate so much when the boiler has been off for hours and what needs to be done to sort it? Thanks.
Strangely is this only happens at weekends which could be significant because on Sat/Sun the system is set to come on at 7.30am but 6.30 am Mon-Fri. The noise always happens around 7am. The boiler goes off at 8.30pm every day.
When the boiler comes on it works fine for both heating and hot water although there is an occasional loud bang. All radiators except one have thermostatic valves.
The noise would wake the dead and is driving me mad, and my neighbours with their new baby are not thrilled either. Can anyone suggest what is causing the pipes to vibrate so much when the boiler has been off for hours and what needs to be done to sort it? Thanks.