Heil Quaker ICP 1172766 Defrost Sensor

When the outdoor coil on a heat pump or cooling unit starts pulling high head pressures or loses efficiency due to ice bridging, the ICP 1172766 Defrost Sensor is the primary diagnostic point. This is a genuine Heil Quaker replacement part engineered as a fixed-temperature bi-metal switch, specifically calibrated with an O60 C32 defrost termination specification. This means the circuit opens at 60°F to terminate the defrost cycle and closes at 32°F to signal the board that a cycle is required. As an OEM HVAC sensor, it ensures the defrost control board receives accurate input, preventing the evaporator coil freezing issues that lead to compressor slugging or reduced heat transfer.

Replacing a drifted or failed sensor with this 1172766 defrost thermostat restores the factory-spec timing for heating cycles. This component is a direct 1064310 replacement and is compatible with a wide range of International Comfort Products (ICP) brands, including Tempstar, Comfortmaker, and Arcoaire. Its rugged, moisture-resistant design is built to withstand the rapid temperature fluctuations and harsh outdoor environments common in split-system heat pumps and commercial refrigeration units.

• Precise Defrost Termination: Fixed O60 C32 logic ensures the system exits defrost mode quickly once the coil is clear, reducing energy waste and preventing "smoke" calls from homeowners.
• Universal ICP Compatibility: Officially supports Heil, Quaker, Tempstar, and Comfortmaker equipment, providing a drop-in fit for numerous defrost control boards.
• Heavy-Duty Construction: Built to endure sub-freezing temperatures and vibration on the refrigerant lines without lead-wire fatigue.
• System Protection: Proper sensing prevents heavy ice accumulation that can bend fan blades or cause low-pressure trips.

How do I test if the 1172766 sensor has failed?
Use a multimeter to check for continuity. At temperatures above 60°F, the sensor should be open (infinite resistance). To test the "close" function, it must be cooled below 32°F using a freezing agent or ice bath to ensure it shows near-zero ohms.

Will this sensor fix a heat pump that stays in defrost too long?
Yes, if the original sensor has drifted and is not "opening" at the 60°F threshold, the board may run the cycle until the safety timeout (usually 10 minutes) is reached. Installing a new defrost sensor often resolves this.

Does this replace the 1053015 or 1082738?
Yes, this is an authorized service replacement for several legacy ICP part numbers, including 1053015, 1082738, 1087515, and 1113680.

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.