hot water but no heating

pompeyben · 4 Dec 2006

for some reason i have hot water but there is no heating. the thermostat is up high and i hear the pump going but it just wont seem to light for the heating only the water...a couple of weeks ago i had to bleed all the rad\\\'s upstairs because they were only hot at the bottom. i got loads of air out of them and they worked fine then a few days ago the heating just wouldn come on.i hear the pump going when i move the switch over but it doesnt light. i have a vaillant boiler not sure exactly which but the user guide lists a number of turbomax models.. the pressure and everything is fine but still no heating just hot water..any suggestions as to what i could do...many thanks ben

ChrisR · 4 Dec 2006

Need to know which vaillant - descibe it?

pompeyben · 4 Dec 2006

hi thanks for replying, well iv found out that the boiler is a "thermocompact vu" thanks

corgiman · 4 Dec 2006

did you top up the boilers water?

pompeyben · 4 Dec 2006

yes the water is topped up. the pressure is fine. everything seems to be fine it just wont seem to light for the heating. thanks

Blasphemous · 4 Dec 2006

If you had to go round all the upstairs rads and bled them and got 'loads of air out' as you say, then I think there's probably an air lock somewhere. Have you tried bleeding the Pump as well?

pompeyben · 4 Dec 2006

no i haven't tried bleeding the pump. how do i do that?

Stellavision · 15 Dec 2006

Also interested in this. I developed exactly the same fault last night.
Boiler is a Vailant TurboMax Plus Combi.

pompeyben · 15 Dec 2006

well it turns out it was a faulty PCB board which a plumber came and changed so everything is fine now

Stellavision · 15 Dec 2006

And my wife fixed it somehow while I was out!
She said something about reading the instructions!

f1ferrari0 · 30 Jan 2007

Hiya. we have a Thorn Olympus boiler. Last week, it seemed that the thermostat wasn't working, heating was either on HOT or nothing. Now, we can't seem to get any heating at all but we have hot water. The dial on the front of the boiler goes up to 5, nothing on 4 so changed it to 5 this morning, boiler fired up but still no heating.

Any ideas would be much appreciated

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hot water but no heating

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