Heil Quaker ICP 1082065 Defrost Sensor

The Heil Quaker ICP 1082065 Defrost Sensor is a critical OEM thermostatic switch designed for precise termination and initiation of the defrost cycle in heat pump systems. Engineered as an L51-20F sensor, this component is calibrated to close at 31?F (initiating a defrost readiness state) and open at 51?F, ensuring the outdoor coil is completely clear of ice before returning to heating mode. As an authentic International Comfort Products (ICP) replacement part, it maintains factory-spec resistance-to-temperature curves, preventing the high-head pressure or auxiliary heat waste common with off-brand thermistors. This sensor replaces legacy part numbers 1052761, 1066430, 1066934, and 1067867, offering universal compatibility across Heil, Tempstar, Comfortmaker, and Arcoaire packaged units and split systems. Integrating this HVAC defrost thermostat into your maintenance routine ensures the defrost control board receives accurate telemetry, preventing coil freeze-ups that can lead to compressor slugging or complete system lockout.

• Precise Thermal Calibration: Operating with an O51/C31 logic, this sensor prevents premature defrost termination, ensuring full coil clearance in high-humidity conditions.
• Broad ICP Compatibility: Designed for seamless fitment in PH55, PYPA, and RCC series heat pumps, reducing truck stock requirements for multiple brands.
• OEM Durability: Built to withstand the extreme thermal cycling of the outdoor liquid line without drift in electrical resistance.
• Plug-and-Play Integration: Features factory-terminated leads for rapid connection to the DFT terminals on the defrost control board.

How do I verify if the 1082065 sensor is faulty during a service call?
Perform a continuity test: when the coil temperature is below 31?F, the sensor should read near zero ohms (closed). If the coil is above 51?F and the sensor remains closed, it is mechanically stuck and will trap the unit in defrost or prevent efficient heating.

Will this sensor resolve a "solid block of ice" outdoor unit?
While a failed sensor is a primary cause, verify that the defrost board speed-up pins can force a cycle. If jumping the sensor terminals initiates defrost, the 1082065 is the confirmed failure point and requires immediate replacement.

Can I use this on 13 SEER and 14 SEER Heil units?
Yes, this sensor is the standard OEM replacement for most ICP-manufactured 13 through 16 SEER heat pumps that utilize a physical clip-on liquid line sensor.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.