Lennox 37J56 Circuit Breaker Switch Field-Ready Installation: Features double 1/4-inch

Field-Ready Installation: Features double 1/4-inch quick connects and pressure connectors

999° F (material limit) is a technical factor

Integrated Shunt: The 1-pole with shunt configuration allows for constant power to crankcase heaters

ensuring you aren't guessing at the pressure range during a service call

where maintaining precise airflow tolerances is essential for efficiency and heat exchanger longevity

Lennox 37J56 Circuit Breaker Switch Field-Ready Installation: Features double 1/4-inchThe 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