OEM Compliance: Direct replacement for York S1-9951-1361 to maintain factory-spec combustion performance

and LFL70A tempering valve series

Engineered with a 250-degree F fixed temperature setpoint

By enabling seamless integration with field mounted devices

As a straight-thru-flow regulator accessory

Lennox 37J56 Circuit Breaker Switch OEM Compliance: Direct replacement forThe Lennox 37J56 Circuit Breaker Switch (also identified as 37J5601) is an OEM grade fuseholder type thermal circuit breaker engineered for high precision overcurrent protection in residential and commercial HVAC systems. Rated for 3 Amps at 250V, this single pole thermal breaker serves as a critical safety component, protecting transformers (T1) and control boards from electrical damage. Designed with a robust panel mount housing, it features a push