hi ,brittony combi se, dumping pressure out of prv valve but only on heating, if heating is not used hot water works ok , and keeps pressure , when heating is used the pressure leaks out of prv ,, ?
brittony
- Thread starter lee32
- Start date
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When system is cold, check the amount of air in the expansion vessel which is the red tank behind the boiler, Stick your finger in the shrader valve and see if water comes out of it. If water does come out of it, get a RGI to replace it.
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