Lennox 38M78 Ambient Switch 318423-701 While the wattage and voltage

While the wattage and voltage may match

This adapter is essential for maintaining the 90 lb force output required in modern hydronic balancing

An insertion crankcase heater provides more efficient heat transfer by being submerged in a well within the sump

the failure is likely concentrated in the HK46ER253 module

Lennox 38M78 Ambient Switch 318423-701 While the wattage and voltageThis 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