Williams Furnace Thermocouple. This is a direct replacement thermocouple for use with Vented Hearth Heaters.
It can be used with either Enclosed Front Hearth Heaters including 3501A, 5001A and 6501A models as well as Fireplace Front Hearth Heaters including 3502A, 5002A and 6502A models.
Click here to download the replacement parts lists and exploded view diagrams. Please refer to the appropriate section for your specific furnace.