hot water does not heat up

[sebastienj]

Hi,

I am having a small problem with my hot water system.

The thermostat does seem to be switching on the boiler to get some hot water. In order to get hot water I have to manually push the leaver of the danfoss type hpa2 actuator and keep it in the little recess where the leaver gets stuck in (which i think is the open position - please confirm). After doing so the boiler turns on.

Does this mean the actuator needs replacing? or could the fault come from else where?

Many thanks
Seb

 

[AssuredHeating]

Sounds like the head needs replacing, them ones are rubbish. Replace it with a Honeywell type if you are competent with the electrics.
You would need to test the valve with a multimeter first though, it could even be the cylinder stat or timer.