Hello, my boiler is a Potterton Supprima. It's about 19 years old. The original PCB was replaced some time ago by a Siemens one.
With heating demand from the thermostat, the pcb indicator light is steady orange, which means the pcb is not receiving a heating demand.
I wanted to check whether the problem was the thermostat. It's a Honeywell T6360B.
When the set temperature is above ambient the thermostat clicks.
The terminal to terminal AC voltages are as follows:
Set temp above ambient: 2-3 246V and 1-3 0V
Set temp below ambient: 2-3 20V and 1-3 220V
Looking at the circuit diagram of the thermstat it looks as if might be behaving as it should. Would anyone care to comment please?
If it's not the thermostat, I assume it's starting to look as if the part of the pcb dealing with heat demand has failed.
I would appreciate any comments or guidance.
With heating demand from the thermostat, the pcb indicator light is steady orange, which means the pcb is not receiving a heating demand.
I wanted to check whether the problem was the thermostat. It's a Honeywell T6360B.
When the set temperature is above ambient the thermostat clicks.
The terminal to terminal AC voltages are as follows:
Set temp above ambient: 2-3 246V and 1-3 0V
Set temp below ambient: 2-3 20V and 1-3 220V
Looking at the circuit diagram of the thermstat it looks as if might be behaving as it should. Would anyone care to comment please?
If it's not the thermostat, I assume it's starting to look as if the part of the pcb dealing with heat demand has failed.
I would appreciate any comments or guidance.