the DML165S ensures that essential oil additives remain intact

leak-free braze joint for standard liquid lines

Common Questions What happens if the slinger ring fails

Standard Compliance: Meets AHRI and ASA specifications

Lennox 20J83 Limit Switch the DML165S ensures that essentialThe 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