All of a sudden we have no hot water but nice 'n warm radiators throughout the house. Timer hasn't been fiddled with by the kids, the boiler seems to want to fire up on 'OVER RIDE' for the HW but promptly shuts down again. Hot water tank stone cold, BUT when I force override, top feed to the tank copper coil gets red hot very quickly but the bottom coil exit pipe (the one attached to the motorised valve) is cold.
Busted motorised valve???
I fear it may be a while to get a plumber out promptly for this (based on past experience) so as its nearly the weekend I thought I'd just ask you guys for any hints advice suggestions and likelihood of being able to tackle it myself.
I would suspect the valve, if you have isolators both sides these are very easy to replace, if not it's a drain down or possibly freeze.
If the rads get warm when the ch is not calling, but the hw is, then it is the valve.
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