Issue with Intergas combi

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26 Jun 2016
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hello
Looking for some assistance. We inherited a Intergas combi hre 36/30 and not really had many issues. We had a Leaking cold water valve which was replaced and that was about it. In the last couple of days my wife noticed the bathroom towel rail was hot even though the heating wasn't on. I felt the pipes under the boiler and the cold water valve was red hot. It seems that when I then run the hot water or heating or switch the boiler off and run the hot water it then cools down to cold. Within half a day to a day it is then hot again and when it gets red hot is when the rads upstairs then start to warm up. Anyone got any ideas?? I've tried to upload a photo. It is the valve on the left. Any help would be great
 

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