Specific Propane Calibration: Preset for 10 inches water column

Direct Fit: Replaces part numbers 010787F and A39790-001 without modification to the wiring harness

It is indexed for a 40-80°F setpoint range typical of frost protection and comfort heating in high-ceiling spaces

low-emission combustion

Lennox 59W35 Ambient Switch 320074-702 Specific Propane Calibration: Preset forThe Lennox 59W35 is a critical low ambient pressure switch specifically engineered for Lennox HVAC units operating in cold weather environments. As a veteran technician knows, maintaining proper head pressure is non negotiable when the mercury drops; this OEM replacement part (102312 01) ensures the system modulates fan cycles or provides compressor protection by monitoring refrigerant pressure thresholds. This HVAC pressure switch is a single pole,