Hot water only works when radiators are on Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[Lord-axminister]

I can only get hot water from my Ravenheat combi boiler (B&Q) when I turn the radiators on full and then turn the tap on has any one any idea what the cause is and the cost of repair/parts Thanks

[holland park heating]

diverter valve.

[property man]

Diverter valves can cost £120+vat for the part plus 1.5 hours labour to replace