OEM Lennox Defrost Thermostat 102438-01 — 65W68
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The genuine OEM Lennox 65W68 (factory number 102438-01) is a defrost thermostat used on Lennox heat pump systems. Mounted to the outdoor coil, it senses coil temperature and signals the defrost control board to initiate or terminate a defrost cycle, preventing ice buildup that would otherwise choke airflow and cripple heating performance in cold weather.
Common failure symptoms: When the 65W68 fails or drifts out of calibration, you may notice the outdoor unit icing over and never defrosting, defrost cycles that run too long or too frequently, reduced heating output, or the compressor short-cycling. A thermostat stuck open or closed is a frequent culprit behind poor heat-pump heating in winter.
Why OEM matters: Lennox engineers this defrost thermostat to open and close at exact temperature setpoints matched to their coil geometry and defrost logic. Generic substitutes with different trip points can cause premature or delayed defrost, wasting energy and stressing the compressor. Choosing the factory 65W68 guarantees correct calibration, proper fit, and reliable defrost operation for your Lennox equipment.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
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Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days