Radiators not coming on

[Funkyfridays]

Deffo the only valve I'm sure

 

[terryplumb]

No two way valves under the combi?

You would think the stats on the middle and top floors would drive two way valves?

That's what I was expecting. I can't think what the thermostats control other than them

 

[SpecialK]

Could be wired in parallel but would be very odd!

Have you tried turning off the working rads on the top floor to see if the ones on the middle floor work.

If you turn all the stats off apart from the middle floor does the boiler fire?

Is it also odd the middle floor stat is polypipe?

That's what I was expecting. I can't think what the thermostats control other than them

 

[Funkyfridays]

Should the valve be to the right or left?

 

[SpecialK]

The lever on the 2 way valve? To manually operate the valve it goes in the opposite direction to your picture and clips in.
If the valve is electronically opened there will be no resistance when you move the lever.

Have you found some more?

Should the valve be to the right or left?

 

[Funkyfridays]

No more valves

 

[SpecialK]

I thought the UFH was working? If so you can ignore that 2 way valve as it works...

 

[Funkyfridays]

Yes the ufh and top floor are on but the middle floor isnt, there is only x1 2way valve

 

[JohnD]

there is only x1 2way valve...

...that you've found so far.

I understand you have a room stat for each floor. That would make sense if each of them controlled a valve to turn the heating on and off for that floor. Might be hidden under floorboards or in a service duct.

 

[Funkyfridays]

That's correct, I built the house 5 years ago and I'm certain there is only x1 valve which is in the cupboard with the ufh manifold, there is no room anywhere else for one to be

 

[ianmcd]

You must have two other MValves, otherwise what do the thermostats control ?

 

[terryplumb]

Could you contact the installers ,and ask them funky ?

 

[Funkyfridays]

Could one valve not do all of it?

 

[terryplumb]

Could one valve not do all of it?

Not if the two floors heat independently.

 

[Funkyfridays]

I'm not sure then, but there is definitely only x1 mv