Lennox 10D08 Wire Harness 321894-708 Optimized Heating Performance: Ensures the

Optimized Heating Performance: Ensures the system transitions between heating and defrost modes only when necessary

While typically installed with the inlet at the bottom and the drain on the side

Common Questions: Is the HY84DA024 compatible with all HVAC brands

Common Questions How do I verify if the 78H11 thermostat is faulty

For technicians troubleshooting a pressure switch open error code

Lennox 10D08 Wire Harness 321894-708 Optimized Heating Performance: Ensures theThe Lennox 10D08 Wire Harness is a critical OEM replacement component designed for high performance defrost control integration in Lennox heat pump systems. Engineered with 24 AWG, UL2468 rated wire, this 50 inch harness ensures precise communication between the defrost sensor and the control board, maintaining system efficiency during low ambient operations. The 10D08 defrost sensor harness features a high temperature 80C threshold and utilizes a