DIY Doctor UK DIY Forums

Hi
I've had a new gas central heating system installed and have numerous problems .As i've had 7 visits by the gas people and still none the wiser i was hoping to get a bit of info on this forum.It's a new Potterton boiler with 6 new radiators.
Problem 1 When i first turn on the heating in the morning (by wall mounted thermostat) all the radiators heat up to a uniform heat but when the boiler automatically re-fires the radiators in my bedrooms and toilet upstairs and in the kitchen don't heat up,but the other 3, 1 in the hall and 2 in the living room heat up o.k.I have all the radiators set at number 4.
If i turn up all the radiators fully this problem does not happen but the house is then too warm.
Problem 2 When the boiler is heating up i get a noise from the 2 nearest heaters that sounds like a kettle when it's heating up prior to boiling.I don't know if this is a problem but i've not heard that noise on my son's similar heating system
Brian

Hi Brian,

Problem 1. Try balancing the system using the lockshield valves,ie the ones nearest the boiler that get hot first, turn those down and follow on.Also play with the trvs to balance too.

Problem 2.Air perhaps- bleed them with CH off , or turning valve down will make the possibly very hot water circulate/dissipate more speedily.

Hth

Thanks for your input Steve.I've noticed that the radiators up the stairs that don't come on all the time although the living room and hall ones do the temparture in the upstair rooms is still warm.Could this be that the Trv's on these radiators are not coming on as they're regulating the temp as there supposed to do and the temp has not dropped enough for them to activate the radiators.
Thanks again for your help.
Brian

Yes Brian, plus as heat rises - keeps upstairs a little warmer!