combination boiler mystery Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[arnauda]

I have a combination boiler .I have switched the central heating off and have left the hotwater to come on twice a day. When the hot water comes on the radiators are boiling hot. What causes this? I have never experienced this in the past. :?:

[htg engineer]

'I have switched the central heating off and have left the hotwater to come on twice a day'

Combi - water will only come on when the hot tap is opened.

Check what type of boiler/system you have and re-post.


htg