4 hours ago Jo asked ... How to engage clutch on old sewing machine to engage needle?    |    Jacky asked ... Miele Vacuum cleaner?    |    Ben asked ... Toyota Yaris French or Japanese?    |    Andy asked ... How can I mend my MacAlistair 450w hedge trimmer?    |    Felix asked ... Hitachi vt-m70em?    |    Click here to ask your question

Can only get hot water when central heating is on?

I can only get hot water if I turn the central heating system on. Once the heating is on I can then switch off the heating and the hot water remains hot, until I turn off the tap. Then I have to repeat the process.
Jenz, June 2009
I assume you have a Combi ? but maybe it isn't, do you have a Hot Tank in an Airing Cupboard ?

Assuming a Combi sounds like either a Hot Water Diaphragm, or depending on the boiler type & Model the Hot Water Flow-Switch

www.elanar.co.uk, June 2009
We had same problem and it was the pressure diaphram had a small hole in it..

JOE WHYATT, June 2009