My ravenheat combi boiler is 5 years old and for roughly one year now it hasnt heated my water without the heating being on. This hasnt bothered me in the winter as I keep the heating on alot for my children but now the weather is getting better I ust want to be able to turn on my hot tap and get hot water. Can anyone help or have an idea what it is!

Tina, May 2010

Diverter valve seized, replace part.

Mivy Gas Safe, May 2010

depending on model of boiler either cold water diaphragm or micro switch or flow switch is faulty usually its the diaphragm that needs replacing try ravenheat website for more info

brian, May 2010