This model is rated for a maximum inlet pressure of 1/2 PSI (approx

Supports 5/8" diameter shafts

Avoid mounting near coils

Its robust construction is designed for high-cycle industrial environments

industrial-grade plastic

Lennox 21L89 Limit Switch This model is rated forThe Lennox 21L89 Limit Switch is a critical safety component designed for precise thermal regulation in Lennox HVAC systems. This auto limit switch features a 3 inch insert and is engineered to open the electrical circuit if the heat exchanger temperatures reach the 210F to 240F range. As a direct OEM replacement part, the 21L89 is identical to the 21L8901, ensuring a drop in fit for contractors maintaining residential furnaces and air handlers. This