baxi back boiler - no heating

[Jupiter01]

hi,

My back back boiler is producing hot water but no heating. Does this point to a specific issue?

thanks in advance.

 

[muggles]

Broken 3-port valve I expect

 

[Jupiter01]

are there any further tests I can conduct to verify that this is the fault?

 

[ianmcd]

can you have CH without your HW being on ? if not you have a gravity HW system and your pump is knackered

 

[Jupiter01]

There is activity in the pump. I could feel this by touch.
I tried switching the Heating on after switching the hot water off and this didn't work either.

 

[ianmcd]

can you have CH on without HW being on , this lets us know if you have a fully pumped or a gravity HW system

 

[FiremanT]

There is activity in the pump. I could feel this by touch.
I tried switching the Heating on after switching the hot water off and this didn't work either.

Feeling activity doesn't guarantee production.

If gravity system, then suspect pump or anti gravity valve (sorry. Anti curculation valve)