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Eh up what's going on here then.


MikeSharp01

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About 2 weeks ago our immersion heaters stat overheat protection tripped out. I changed the stat and yesterday it, the new one, tripped again. So something funny is going on. I guess it must be the boiler circuit overheating the tank and I adjusted the boiler stat down 5 deg last time but that seems not to have cured it. Is there another failure mode I asked myself. The only thing I can think of is that the bypass valve is leaking so even when it is shut hot water continues to get through onto the coil. I will check that later but is there anything I have missed?

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