Lennox 38M78 Ambient Switch 318423-701 An insertion crankcase heater provides

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

Durable Construction: Built with a cast bronze body and brass trim to resist corrosion and withstand fluid temperatures from 35

You can adjust the high and low indicators independently to your required WC settings before replacing the cover

We recommend verifying your unit's parts manual before ordering

Lennox 38M78 Ambient Switch 318423-701 An insertion crankcase heater providesThis 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