Key Benefits Durable Silicone Insulation: Engineered to withstand the extreme internal temperatures of gas-fired boilers without degrading or cracking

maintaining the integrity of the original system design without requiring extensive modification

the switch should be normally closed (0 ohms)

If your motor has been upgraded to a larger shaft size

ensuring the inducer motor is pulling a sufficient draft before allowing the gas valve to open

Johnson Controls A421GEF-01C Temperature Control Els PW 17895 Key Benefits Durable Silicone Insulation:The Johnson Controls A421GEF 01C is a professional grade electronic temperature control designed for precise thermal management in demanding HVACR environments. Operating on 24 VAC, this unit offers a broad setpoint range of 40 to 212? F, making it suitable for both refrigeration and heating applications. As the direct replacement for A419GEF 1, it features an upgraded front panel LCD for real time monitoring and simplified on off temperature control