D
doresy
Hi all, first post here so hope it conforms!
My System. Boiler- old Potterton Netaheat 10-16. Pump, newly fitted Grunfoss. Programmer Danfoss.
Heating is pumped and hot water gravity fed.
Ok, after the summer I ran the central heating for the first time and realised that the pump was seized as it was buzzing but no rads were getting hot.
As the shut off valves were totally corroded I employed someone who drained the system and fitted a new Grundfoss pump and 2 new valves.
The problem I have is the pump is live (running) if the room temperature drops below thermostat setting even if the programmer timer is off. The boiler only comes on as well during the timer on period.
I decided to replace the programmer too (like for like) and it seemed to work fine, then later all the rads got hot even though it was set to hot water only. I then discovered the pump was running continuously again, stopping only if I turned the thermostat down to zero.
Any thoughts please???
My System. Boiler- old Potterton Netaheat 10-16. Pump, newly fitted Grunfoss. Programmer Danfoss.
Heating is pumped and hot water gravity fed.
Ok, after the summer I ran the central heating for the first time and realised that the pump was seized as it was buzzing but no rads were getting hot.
As the shut off valves were totally corroded I employed someone who drained the system and fitted a new Grundfoss pump and 2 new valves.
The problem I have is the pump is live (running) if the room temperature drops below thermostat setting even if the programmer timer is off. The boiler only comes on as well during the timer on period.
I decided to replace the programmer too (like for like) and it seemed to work fine, then later all the rads got hot even though it was set to hot water only. I then discovered the pump was running continuously again, stopping only if I turned the thermostat down to zero.
Any thoughts please???