Radiator Circuit heats up when hot water is demanded!

Joined
25 Nov 2007
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Location
UK
Country
United Kingdom
Hi all!

My problem is this:

My Worcester Bosch (15+ years old) has been switched to Hot Water "on" and Central Heating "off" all summer. However whenever i demand hot water (either washing machine, tap, shower etc) i can hear the pump running in the boiler and the central heating pipework heats up aswell.

None of the radiators are heating up because ive turned all the TRVs right down, but surely this is using un-needed gas and thus costing me money! Ive also noticed that the pump switches off a couple of minutes after the hot water demand has been switched off.

Any body got any ideas? They would be gratefully received!!


Peterb
 
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