can anyone help me ive got a vented old system and suffer from venting (heating the refill tank) the pump looks ok and is working, the hot water-central heating and hot water valve works ok. ive bled everything but when you put heating on even on hot water only it just bangs and vents to the refill tank and you can hear water falling back from the pump causing airation. is this likely to be a blocked, scaled up heat exchanger? any help would be gratefully appreciated. thanks. its a thorn apollo 15/30b boiler
central heating venting
- Thread starter red49
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How do you know the pump is working? You cannot tell, just because you can hear it.
The cold feed may be blocked also, but I have known the heat ex's to block on these. Easy to fix with the right chemicals, but you would need an RGI.
Mr. W.
The cold feed may be blocked also, but I have known the heat ex's to block on these. Easy to fix with the right chemicals, but you would need an RGI.
Mr. W.
the pump is brand new. the cold feed seems fine so it looks like a blocked exchangr then?
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or a blockage after the openvent..... maybe in the pipework somewhere
I Would try a powerflush
I Would try a powerflush
or a blockage after the openvent..... maybe in the pipework somewhere
I Would try a powerflush
I would agree, is it an old OV system if so when was it last flushed, you will have alot of crud in the system if it's old, if you go for a flush don't get BG to do it as they charge a fortune, also how do you know cold feed is ok, just because water falls down it ok it doesn't mean hot water will expand up it ok
got my boiler fixed it was the heat exchanger blocked. thanks to all for your advice. I,m changing to a combi boiler in august can anyone point me in the direction of a decent make and model. My house is a three bed semi with 7 radiators. Once again thanks to all
As a householder only, I think Vaillant boilers are a good bet, others opinion will vary on this.
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what do you suggest Mr W. 3 bed semi, 7 radiators?
No idea what you're talking about, Vaillant are fantastic boilers as are WBosch, I would go with vaillant though and as already said make sure you get a decent installer, don't go for cheapest
Their more expensive models are not bad, but their service is atrocious.
I will somewhat agree with this statement in that service is not their strong point but hopefully you get a good RGI and he/she will look after you as a customer
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