I have a Thorn housewarmer E backboiler which reciently the burners stopped working, the pilot light is still ok. I have been told it could be the gas valve, or that it could be the thermostat. Now im not sure which it could be, I know the make and model of the valve, 'Honeywell'etc, but only know the make of the thermostat, 'Ranco', but cannot find what parts number it is. I have written the details that are on the existing unit, but without a parts no. im not sure which one to buy. So can anyone help on whether it is the valve or thermostat and also which model it would be. Thankyou