Hot water no heating after fitting new danfoss HSA3 valve and actuator

24 Jan 2016
Reaction score
United Kingdom
Since switching my heating on this winter I have had hot water no problem but to get heating had to manually push the spindle on the actuator head to manual which works fine until house gets to temperature then cuts out and I gave to do this again to get heating. Found on a lot of threads that it was the actuator so we changes the whole thing yesterday valve and head but still have the same problem (plenty of hot water which cuts in and out but no heating unless I push the spindle across) please can anyone advise as this is so frustrating
Have Ideal Icos HE15 boiler
Danfoss actuator and valve
Danfoss wireless thermostat and timer
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At the programmer.
set hot water to off
Set heating to on
room thermostat to max
Any heating?

Set hot water to on
Set heating to on
Room thermostat to max
Set clyinder thermostat to min
Any heating?
Does the valve move when you call for heat? There is an indicator on side marked W M H. It should move to H when heating is on or M for water and heating.
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I gave just sat up by where 3 way valve is and when I switch thermostat up and then off you can hear the spindle move back its seems as though it's not moving over enough because if I then push it a bit the pump starts to run and we have heating
Hi yes you can hear it move but not enough to get pump to work if I push to manual pump kicks in
Sorry ignore my post I was thinking of a Drayton valve not a Danfoss.
Do you have a multi meter and know how to use it?
No got my brother coming to have a look to test electrics toMorrow as seems as though the pump is not being called for when heating is on so nothing pumping around system

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