Heat transfer grease is an insulator and will prevent the sensor from making the necessary metal-to-metal contact required to track water levels

What happens if my furnace keeps tripping this switch

Key Benefits Optimized Fan Cycling: Precisely maintains head pressure by cycling condenser fans at 170/250 PSIG setpoints

provided the regulator body is rated for the fuel type

TB Woods 4J-3/4 Coupler Flange Heat transfer grease is anThe TB Woods 4J 3 4 Coupler Flange is a Type J Sure Flex Plus power transmission component engineered for heavy duty industrial and HVAC applications. Manufactured from high strength sintered carbon steel using a powdered metal process, this Size 4 flange provides exceptional dimensional accuracy and uniform material properties. It features a precision 3 4" bore with a standard 3 16" x 3 32" keyseat and a primary setscrew positioned over the keyway