My Boiler is a THORN MARATHON 56/76C converted to run on Propane.
The pilot light fails when the Boiler thermostat turns the Burner off.
A Heating Engineer fitted a new Thermocouple to the pilot but this does not cure the problem.
The Pilot will burn continuously if the burner thermostat is turned off and the burner will light O.K. when the Boiler is thermostat (knob) is turned. and it will relight when the knob is turned on and of manually, but when the burner is turned of automatically with the thermostat, the pilot goes out with it.
The pilot light fails when the Boiler thermostat turns the Burner off.
A Heating Engineer fitted a new Thermocouple to the pilot but this does not cure the problem.
The Pilot will burn continuously if the burner thermostat is turned off and the burner will light O.K. when the Boiler is thermostat (knob) is turned. and it will relight when the knob is turned on and of manually, but when the burner is turned of automatically with the thermostat, the pilot goes out with it.