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Central Heating Question
Hot water tap runs hot then cold
For the last 4 weeks ALL of the hot water taps in my house run hot then cold. I can fill up half a washing up bowl with the hot water then it goes cold. I cannot get the hot water again until about an hour later and then only half a washing up bowl.
I have a combi boiler but the heating is working fine - all radiators are unaffected and my electric shower works fine to.
Two possible causes here:
1. Diverter valve not operating correctly
2. As above plus Hot Water stat/sensor faulty
Suggest you contact a competent Gas Safe heating engineer
Answered 3rd Mar 2013