Lennox 79J89 Limit Switch using this HVAC repair part

using this HVAC repair part ensures OEM ignition compatibility and long-term reliability without the fitment issues common to universal alternatives

this relay serves as a vital safety interlock

those two part numbers represent the same technical component

Key Benefits for HVACR Contractors Durable Construction: Fabricated from 304 stainless steel to resist oxidation and scale buildup in hot or chilled water applications

Lennox 79J89 Limit Switch using this HVAC repair partThe Lennox 79J89 Limit Switch is a critical OEM replacement part designed for precise thermal regulation in Lennox residential and commercial furnaces. This 140 170F AUTO Limit Switch functions as a primary safety mechanism, monitoring internal plenum temperatures to prevent heat exchanger damage or unsafe operating conditions. Engineered with a 170F cut out temperature and a 140F cut in temperature, this automatic reset limit switch ensures the