Upstairs heating

[Bomber74]

Ok I have a dual oil and back boiler system. Ever since I moved into this house of horrors I’ve had no heating upstairs. Downstairs rads ok but nothing upstairs . No air in system and all valves open. Can’t figure out why no pressure upstairs. Had the whole system professionally flushed as well and both circulating pumps working 100%. Any help much appreciated

 

[Aquarius]

No pressure upstairs? Not sure what you mean here as you said there’s no air? Is there a zone valve?

 

[Bomber74]

By no pressure I mean when I have heating on and open a radiator to bleed very low presssure obviously forcing any water out. No idea what or were a zone valve is.

 

[Aquarius]

This is a zone valve, although some have plastic heads. Usually located in cylinder cupboard. Have you tried closing all rads downstairs?

You don't have permission to view attachments. Attachments are hidden.

 

[SJB060685]

Does water come out of the bleed ports when you try and vent the upstairs radiators?

 

[Bomber74]

Yes I have a zone valve. When oil heating is on its moving automatically to open position. I have tried closing all down stairs rads but no joy. I have noticed that when oil heating on it still heats water in my back boiler of open fire

 

[Bomber74]

Does water come out of the bleed ports when you try and vent the upstairs radiators?

Very little

 

[SJB060685]

Ok. Possible but not definite the ball valve in the loft is stuck and you don't have enough water in the system. Check the small head tank in the loft and see if there's water in it. At least rule this out first.

 

[Bomber74]

Ok. Possible but not definite the ball valve in the loft is stuck and you don't have enough water in the system. Check the small head tank in the loft and see if there's water in it. At least rule this out first.

It’s fine. Checked it last night when I went over whole system again for faults

 

[SJB060685]

Ok you can rule that out then. You say both pumps are 100% ok, whats the temperature of the boiler pump like when the boiler is running?