The Heil Quaker ICP 1064310 Defrost Sensor is a critical OEM replacement component designed to maintain the operational integrity of heat pump systems during low-ambient conditions. Engineered for precise evaporator coil temperature monitoring, this O61 C36 sensor ensures the defrost cycle initiates only when necessary, preventing inefficient operation and potential compressor slugging. This specific part is a direct ICP replacement sensor utilized across brands including Heil, Tempstar, Arcoaire, and Comfortmaker. It functions as a thermistor-based limit switch, typically calibrated to close at 30?F to signal the defrost control board and open at approximately 60?F to terminate the cycle. By managing the heat pump defrost cycle accurately, it prevents excessive ice buildup on the outdoor fins while maximizing heating capacity. When diagnosing a faulty defrost thermistor, technicians should verify resistance values against manufacturer specifications to ensure the reversing valve and outdoor fan motor respond correctly to thermal changes.

• Precise Thermal Sensing: Features calibrated O61 C36 specifications for accurate defrost initiation and termination.
• OEM Compatibility: Genuine ICP 1064310 part ensuring exact fitment for Heil, Tempstar, and Snyder General units.
• System Protection: Prevents heavy frost accumulation that restricts airflow and reduces HVAC system efficiency.
• Optimized Performance: Reduces unnecessary defrost cycles, lowering energy consumption and mechanical wear on the reversing valve.

How do I test if the ICP 1064310 sensor is bad?
Use a multimeter to check for continuity. The sensor should typically show continuity (closed circuit) when the coil temperature drops below 30?F and show an open circuit once it rises above the termination setpoint. If it stays open during icing, the sensor has failed.

What are the symptoms of a failing defrost sensor?
Common indicators include thick ice sheets covering the outdoor coil, the unit staying in defrost mode too long, or the system failing to switch into defrost at all during freezing temperatures.

Can this sensor be used in other HVAC brands?
Yes, as an ICP (International Comfort Products) component, it is compatible with several brands under the Carrier umbrella, provided the 1064310 or 1172766 part numbers match the service manual.

Item is Non Cancelable / Non Returnable

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.