3 yr old sytem running vailliant 828 turbo. Turned it on today ( cos of baby) and no heating either upstairs or downstairs. Pressure at 1.5 bar. Whats goin on? 6 rads in total in house.

 

Have you lit the pilot

 

yes Spadge, it lights up when water heating up

 

Does the main burner come on at all when heating is on?

 

when run hot water you hear it flame up, so to speak and the same if ay you turn up the water dial to a higher temp. Orange light comes on.

It doesnt howver come on when heating turned on

 

Combi
Could be anything!
What tests have you done?
Water heating works then?

 

no tests, cos i aint got a clue lol. water heating is sound, no problems

 

Have you got a roomstat and is it working(you can usually hear them click when you turn them)

 

no room stat mate

 

any pipes or anything at all on the heating side getting warm?

If nothing at all, and no room stat, then either control gear or the motorised valve for the heating side. Does anything click or whirr when you switch the heating on and off?

 

Sounds like diverter valve on boiler, dont quote me on that though. On a combi the diverter valve can sieze up cos it made up of a brass valve with a diapraghm(large rubber washer) inside and these tend to become brittle and sieze up. The preset postion its in is for hot water, so thats why your hot water works. Combis are a nightmare, I just fit them, dont repair them yet so it could possibly be something else.

 

ave you tried the heating control dial on the vaillant in case its got a bad segment ?

 

if the burner aint chiming up when you put the heating on its almost certainly an electronic prob

 

Cheers Jonsey! What you reckon that will cost

Nightdavva, turned it up and down, but nothing matey.

 

If it is that? a diaphragm only costs a few quid then about 60 odd quid for the engineer to fit it. The shell of the diverter valve (the brass part) should be fine as the boiler is only 3 years old. They could turn up and it be somethimg else, but diaphragm sounds like most likely cause. By the way the pump does come on when heating is turned on doesnt it? does not make any strange noises?

 

well, when its turned on it tries to start, a bit like a car , but doesnt if that makes sense. It does it 3 or 4 times but then nothing

 

Feel the central heating pipes a couple of metres from boiler and you will feel water flowing through, then pump is fine.

 

ok. will do this tomorrow when i return from rsoc. I am just on way out now. Thanks for all your help guys. let you know tomorrow

 

Give me a call i will sort it si 07786 980 249

 

the boiler has now gone even madder. When you turn the heating off and turn to heat the water, the heating comes on and we get no hot water. Turn it the other way then we get water but no heating when the heating is supposed to be on.
The heating aslo does not come on with the set time on boiler. I came back from Donny on sundat to find the whole house at 83c!!!!!!!