Radiators hot downstairs, cold upstairs. Need help!

[chris459]

Really wanting to see if someone can help me. I have so much trouble with my boiler and heating system over the last year.

I have a Grant combi boiler, oil fired. Its less than 10 years old and has been regular serviced etc. The house has 2 individual thermostats, one for downstairs and upstairs.

About 4 months ago, the heating and the hot water stopped working. Called plumber and he came out. Discovered the system had drained itself, put this down to a leaky fitting on the expansion vessel. Also discovered that a small circuit board was burnt out, so was replaced by a different engineer (worked for grant), and the boiler fired up and everything looked fine.

However a few nights ago we turned on the heating, downstairs radiators warm, upstairs cold. Hot water upstairs has never been effected, but the radiators will not heat up. Tried turning off the downstairs thermostat, and turned up the upstairs up full. Makes no difference at all.

Really don't want to get plumber out again as its costing me a fortune. Any help would be greatly appreciated. Thanks

 

[bellairaphon]

Is the upstairs thermostat turned up? Do you know where your zone valves are located?

Nathan

 

[chris459]

Hey. No Im not too sure where they are, any easy way to find them? Also, what exactly do they look like? Ive had the thermostat up full, makes no difference

 

[tincup]

Hi

Have you checked there is water in the upstair rads?


HTH

 

[chris459]

Yes there is water in them, first thing I tried was bleeding them, water coming out

 

[CBF]

they will look something like this


http://postimage.org/

 

[chris459]

Someone suggested they might be behind a removable panel in cupboard or something like that, cant think where as Ive had a look