Recent content by Stagman74

Mandate, Many thanks for all your help and for so logically laying out the conclusions from the tests that you advised I perform. I have replaced the complete actuator and all appears to be working fine now. Regards.

Thanks Mandate. In my case I have on the programmer either HW or HW and CH together operating what appears to be a "Mid Position Valve". With HW selected on the programmer the actuator is at rest ie unwound. All appears to works fine ie HW is brought up to temperature and then kept at the...

Thanks Mandate. Final question(s) before I depart for the day: With actuator manually operated in order to fire up the boiler, I still get 0V between Blue and Orange with the boiler running. Is this what would be expected? Also the hot water works fine and once you have manually...

With controls set for CH: Multimeter readings as follows: Blue - Brown/white ~240V. Blue - Grey ~240V. Blue - Orange ~ 0V. Hope this makes sense.

Thanks for the prompt reply. My next step would appear to be a new actuator. Wickes has a 3 Port Danfoss actuator (Wickes Code 228352) which I assume is a replacement for the Danfoss P/N 5933, Type HSA3 as presently fitted. I will hopefully buy this tomorrow and fit it unless anyone...

4 wires to actuator: Brown/white wire connected to 'actuator'. Blue wire connected to Synchron motor. Grey wire connected to 'actuator'. Orange wire connected (return from?) to Synchron motor. Have put multimeter across the Brown/white and Blue wires. Reading of ~240V recorded...

Advice please: I have a conventional heating system from the late 80s - boiler, hot water tank and radiators. This is controlled by a timer (acl switchmaster), room thermostat and tank thermostat (both are the original Sunvic units). With the timer's controls set to Heating and Water, I can...