Originally posted by: kieronbrophy
Originally posted by: haslemere1
Originally posted by: John Creasey - Boiler Installation & Service, Gas & Heating Maintenance
My central heating radiators work upstairs and hot water is fine however the system only just heats some of the...
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Does it heat some of the radiators - or 'some' of each radiator? i.e.: are there cold spots on the rads. Sludge will tend to hit...
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Hi, I have much the same problem. I have a Gloworm 24hxi with expansion tank in loft serving a cylinder in in small bedroom (for power shower) running 7 no rads( 1-4 years old) and an underfloor heating system, with its own pump connected, in the extension (15M2) I have had 3 power flushes in the last 18 months (ouch). Problem is, 2 no rads downstairs(returning to boiler??) get warm to quite warm at the top only, until you turn off all the other rads in the the house and these 2 rads are hot top and bottom!!. Logic to me says that central heating pump for rads is not powerful enough. Any feedback is much appreciated thanks regards Kieron
As per Remloc above.
Very common cause of this is where builders put on an extension, and fit extra radiators or circuit to pipe-work that was never designed/sized for the extras. In order to get one new part working, something else suffers. Often the builders will open up their new section fully to show how well it works, and only later does the client realise that something else doesn't work that well.
Does the underfloor heating system have its own mixer/blender valve ?
Balancing is the answer, but if the above pipe-work scenario exists in your case, it may be a battle that keeps recurring.
Thermostatic radiator valves help as they sort of help to self balance (no completely, but to an extent)
All the best,