Once the system cools to the 125°F cut-in threshold

The heavy-duty NEMA 1 housing includes a 1/2" NPT nipple for direct mounting to electrical boxes

because Lennox is the parent company for Allied Air brands

Check your valve model against the technical documentation to ensure the spring fits correctly

Built with a corrosion-resistant stainless steel core and a closed-cell foam sleeve

Lennox 80K28 Pressure Switch Els PW 17895 Once the system cools toThe Lennox 80K28 is a critical safety component designed for precise furnace pressure monitoring in high efficiency gas fired systems. This OEM Lennox replacement part, also identified as 80K2801, features a factory calibrated set point of . 43" WC (Water Column) to ensure the inducer motor is generating sufficient draft before allowing ignition. Built for durability in demanding HVAC ventilation systems, the switch utilizes a Single Pole Single Throw