Another "pump not working" question.

[Minty]

Hi folks, I've got a Grundfoss CH pump not working. I've taken the silver end cap off and spun it with a screwdriver but still no go. I don't think I've got any motorized valves as its an old system with 2 flow pipes for hot water and CH and 2 returns. Satchwell room 'stat clicks when you turn it up. It has a Dandfoss 102 programmer (timeswitch?). Could the room stat be faulty even though it clicks when you turn it up? Could the programmer (timeswitch) be faulty even though it turns the water (boiler) on? Is it a plumbers job or an electricians?
Many thanks to anyone who offers help or advice.

 

[Scottley]

test the supply to the pump to see if its live?

 

[Minty]

I've thought of that; is it always live or just when the timeswitch is on 'and' when the thermostat is calling for heat. I got a multi-meter, so I guess I check between live and neutral?? Luckily I got RCD protection

 

[Billy Bob Bob]

call a pro in mate any competent plumber/rgi should be able to sort it,your messing and unsure of what your doing at best you could get spiky hair and a permanent stiffy LOL at worst ......death

 

[Minty]

Thought of a safer approach; I turned off the electric to the timeswitch and pump. Dis-connected the pump from the power supply. Connected the pump direct to a wall socket and hey presto it works. So its got to be the thermostat, timeswitch or faulty wiring. Tried turning the thermostat down to see if it turned the boiler off but it didn't. But you can hear the thermostat click as it goes past room temperature. I am now controlling the heating by turning the pump on and off from the wall socket it is connected to. Any suggestions?

 

[Dotty]

Yep. get an electrician in mate.