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no hot water

Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws

R

robbie g

hot water only comes on when the heating is on can anyone say what might be the problem
 
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Possibly the zone valve is broken.

Unlikely, but the switch selecting Hot Water or HW/Central Heating might be broken or have a loose connection.

Hopefully others will come up with more sensible suggestions.
 
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