Lennox 36W77 Pressure Switch 321042-401 000-ohm thermistor probe provides high-accuracy

000-ohm thermistor probe provides high-accuracy outdoor air temperature monitoring

This HVAC expansion valve is a critical replacement for maintaining the long-term operational integrity of Carrier and Bryant air handling units

Its durable construction resists blade deformation under high-velocity operation

This heavy-gauge steel housing is built for industrial-grade durability

Lennox 36W77 Pressure Switch 321042-401 000-ohm thermistor probe provides high-accuracyAs a seasoned technician, you know that a failing 2 stage pressure switch can ground a high efficiency furnace during the peak of the heating season. The Lennox 36W77 is a dual stage assembly engineered specifically for variable capacity and modulating furnaces, such as the G71MPP series. This genuine HVAC OEM part features two distinct set pointsa Low Fire stage at 0. 25" W. C. and a High Fire stage at 1. 22" W. C.to ensure the inducer motor is