Hi,
I have a Glow Worm Ultimate 50FF which is on constantly.
This setup has been running ok for the last 26 years
With the Programmer on:-
Both motorised valves move on/off when thermostat for both water and heating are adjusted - so appears ok
The House/hot water heats up & then when at temp, the motorised valves shut off, and the boiler overheat thermostat trips the boiler out.
If the programmer is switched off, the boiler still fires up and trips out due to overheat.
There doesn't appear to be any leaks anywhere that may have caused a short circuit.
I've had a couple of heating engineers around and neither appear to know the cause.
Any ideas?
Thanks in advance.
I have a Glow Worm Ultimate 50FF which is on constantly.
This setup has been running ok for the last 26 years
With the Programmer on:-
Both motorised valves move on/off when thermostat for both water and heating are adjusted - so appears ok
The House/hot water heats up & then when at temp, the motorised valves shut off, and the boiler overheat thermostat trips the boiler out.
If the programmer is switched off, the boiler still fires up and trips out due to overheat.
There doesn't appear to be any leaks anywhere that may have caused a short circuit.
I've had a couple of heating engineers around and neither appear to know the cause.
Any ideas?
Thanks in advance.