I have a fully pumped central heating and domestic hot water system operated by separate motorised valves. The central heating works ok but the domestic hot water pipes are not heating up. The bolier is ok; the control programmer is ok, the cylinder thermostat is ok; the motorised valve is opening and closing ok but the return flow pipe just does not get warm / hot. I've drained and refilled the whole system 3 times thinking that I must have an airlock but I still have the same problem; central heating radiators fill, bleed and heat up ok. I can only think that I have an airlock that I can't shift!!! Any ideas?
Domestic hot water cold but central heating ok
- Thread starter PeteG1
- Start date
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is the boiler firing up on hw only ?
did you open the mot valve when refilling ?
did you open the mot valve when refilling ?
Sorry for the delay in replying, I've had problems with the website.
Motorised valves were open when system was draining and refilling.
I tried HW by itself and presumed boiler fired up as the flow pipe heated up but the return pipe remained cold; didn't even get warm.
Motorised valves were open when system was draining and refilling.
I tried HW by itself and presumed boiler fired up as the flow pipe heated up but the return pipe remained cold; didn't even get warm.
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