While factory-set to 3

Key Benefits Precision Metering: Includes high-flow gas orifices calibrated specifically for 50

while the flame sense test pins allow for direct flame current measurement without breaking the circuit

Enhanced Lead Length: 18-inch leads provide additional reach for easier termination in complex wiring configurations

For fail-safe operation

Lennox 38M78 Ambient Switch 324846-701 While factory-set to 3This Lennox 38M78 Ambient Switch is a critical pressure actuated component designed for head pressure control in low ambient cooling applications. Engineered for precision, this low ambient pressure switch ensures reliable operation of your HVACR system when outdoor temperatures drop, preventing compressor slugging and maintaining the necessary pressure differential for efficient thermal transfer. The Lennox 38M7801 features a specific cut in point of