Ferolli Falcon II boiler

[shabir.mehdi]

Ferolli Falcon II boiler: I switched the system off when I went on my holidays, on my return, the CH did not work, the DHW is fine.
I have tried to rotate the grunfdos pump , it seems to be jammed, is this the likely cause of the problem ?
This is the 2nd problem that I have expereinced with the boiler, I did repalce some thermistors last year because the CH was intermittent, this cured the problem

 

[Dan Robinson]

Have you checked for demand at the boiler from the heating controls?

 

[ChrisR]

Well it shouldn't seem to be "jammed"! Try putting the CH on and giving the screw a tweak to help it start.

 

[shabir.mehdi]

Well it shouldn't seem to be "jammed"! Try putting the CH on and giving the screw a tweak to help it start.

The central screw on the pump is totally jammed solid

 

[gas4you]

What, the big silver outer one or the one inside under this?

 

[shabir.mehdi]

What, the big silver outer one or the one inside under this?

The big silver one outside

 

[gas4you]

That one is just a cover/seal for the important one underneath it. Can you feel/hear the pump running?

 

[shabir.mehdi]

That one is just a cover/seal for the important one underneath it. Can you feel/hear the pump running?

No the pump is totally dead

 

[gas4you]

Well if you have checked there is demand for ch or hw as Dan previously said and there is 240V at pump then it is time for a new pump.