Radiator heating when hot tap turned on.

Joined
13 Apr 2011
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295
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Location
Antrim
Country
United Kingdom
Hi for about two weeks my radiators heated up when hot water tape was turned on. But all of a sudden its rectified itself. Could a possible power cut have reset the boiler to fix itself as we gave not switched it off? I have no idea how it's fixed but it has
 
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Lots of combi boilers "dump" excess heat through the heating circuit when the water has been run and turned off (the first rad on the circuit warms up), very hot weather might well make it more noticeable, It might just be that.
 
Nothing to worry about then? It was doing it for about a week or two
 
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Hi so I released the pressure and for three or four days the radiators stopped heating when the tap is turned on. But they have started heating again. The pressure is still around what I released it to. Is this simply the boiler dumping extra water or something more serious?
 

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