Combi boilers/heaters : Fri Jul 12, 2013 9:01 am  

Does anyone on here have an idea what may be going on with said heater when the hot water suddenly turns to cold water please as I find it baffling ?

Thank you.

Re: Combi boilers/heaters : Fri Jul 12, 2013 9:03 am  

Dead Man Walking wrote:

Does anyone on here have an idea what may be going on with said heater when the hot water suddenly turns to cold water please as I find it baffling ?

Thank you.

If the radiators are also coming on, my bet would be a diverter valve problem

Re: Combi boilers/heaters : Fri Jul 12, 2013 9:08 am  

Dead Man Walking wrote:

Does anyone on here have an idea what may be going on with said heater when the hot water suddenly turns to cold water please as I find it baffling ?

Thank you.

Have you checked whether the heater is genuinely cutting-out or whether the heater is working OK and the problem is elsewhere?

Re: Combi boilers/heaters : Fri Jul 12, 2013 9:19 am  

It had this problem the other week and a council plumber came out and tried to see if he could get it to cut out but couldn't. The radiators came on fine though when he set it off.