I have a 10 year old Caffoteaux Calydra. Hot water works fine, except that, once the hot water sink tap has been turn off, and the boiler reached temperature, the gas stops but the pump and fan do not stop after the set 4 minutes. I have left it for a few hours and it never stops.
Also, when I switch the boiler to heating or water and heating ( with the room thermostat well above the actual temperature) the pump and fan start immediately but no gas/flame.
I assume both are related.
I am thinking of replacing the 3 way valve (but I assume this will not fix the fan/pump overrun on heating), the water throttles (hot water and heating) and the heating temperature sensor.
Do I need to replace all of these and I am missing anything?
Also, when I switch the boiler to heating or water and heating ( with the room thermostat well above the actual temperature) the pump and fan start immediately but no gas/flame.
I assume both are related.
I am thinking of replacing the 3 way valve (but I assume this will not fix the fan/pump overrun on heating), the water throttles (hot water and heating) and the heating temperature sensor.
Do I need to replace all of these and I am missing anything?
