Lennox 20J83 Limit Switch OEM Compatibility: Specifically designed for

OEM Compatibility: Specifically designed for Nordyne G6 series furnaces and Miller/Intertherm mobile home units

Contractor Grade: Designed for rapid field installation to reduce labor time during HVAC sensor maintenance

What symptom indicates a failed damper door spring

As a critical replacement part

using a genuine Weil-McLain seal is necessary to ensure precise tolerances and long-term reliability

Lennox 20J83 Limit Switch OEM Compatibility: Specifically designed forThe Lennox 20J83 Limit Switch (Model 20J8301) is an essential HVAC OEM replacement part engineered for precise thermal management in high efficiency furnaces. This single pole, single throw (SPST) automatic control is factory calibrated to actuate at 165F, effectively breaking the circuit to prevent heat exchanger damage or unsafe operating conditions. Once the plenum temperature cools to 135F, the switch automatically resets, restoring normal system