Lennox 79J89 Limit Switch When you're troubleshooting a system

When you're troubleshooting a system that keeps short cycling or tripping on low pressure

Internal Restoration: Replaces the critical paddle and seal assembly to stop bypass and internal leaking

ensuring a drop-in fit with existing mounting holes and standard spade connector terminals

this assembly is functionally identical to the Honeywell Q314AFK series

'close on fall' means the electrical circuit completes when the negative pressure (vacuum) reaches the designated set point of -

Lennox 79J89 Limit Switch When you're troubleshooting a systemThe 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