ensuring precise fuel-to-air ratios and stable burner performance

indicating the direction of the air moving from the return ducts and through the unit

Durable Internal Components: Features a rugged stainless steel spring and EPDM disc for long-term seat reliability

Precision Fit: Specifically engineered for the S211-N1-J5 model to maintain the original Cv factor and response time specifications

Lennox 79J63 Control mario ensuring precise fuel-to-air ratios andThe Lennox 79J63 Control is a critical high limit safety component designed to monitor and regulate internal plenum temperatures in residential and commercial units. As an auto reset limit switch, this part is engineered to break the heating circuit when temperatures hit the high limit threshold of 170F (Open), and automatically re engage the sequence once the heat exchanger cools to 130F (Closed). Frequent cycling of the Lennox 79J63 often indicates