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empty header tank?

have a leak on a radiator so emptied the header tank and tied up the ball cock. Can I run just the hot water with the heating switched off
judith, April 2014
If you are talking about a combi boiler then the answer is no,if you have a hot water tank you can heat it with the immersion heater.If the leak is only on a radiator why not just turn valves off to that radiator and leave your system full

toptrish, April 2014