Lennox 38M78 Ambient Switch 318423-701 This 10x9x5/8 blower wheel features

This 10x9x5/8 blower wheel features a clockwise (CW) rotation and is constructed from heavy-duty galvanized steel to withstand the high static pressures common in modern HVAC systems

Key Benefits for Technicians: Direct Retrofit Compatibility: Seamlessly replaces the discontinued Veris PXPXX02S without requiring extensive panel modifications

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

Power Outage Reliability: Millivolt control system operates without electricity

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

Lennox 38M78 Ambient Switch 318423-701 This 10x9x5/8 blower wheel featuresThis 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