Heil Quaker ICP 1171481 Defrost Sensor
The Heil Quaker ICP 1171481 Defrost Sensor is a critical OEM replacement part designed for International Comfort Products (ICP) heat pump systems. This O80 C30 sensor functions as a limit switch within the defrost control sequence, engineered to close at 30?F to initiate the timing circuit and open at 80?F to terminate the cycle. By precisely monitoring the evaporator coil temperature, it prevents excessive ice buildup on the outdoor coil, ensuring the system maintains high thermal transfer efficiency during low-ambient heating operations. Built for rugged field conditions, this HVAC temperature sensor integrates seamlessly with existing defrost boards across brands including Heil, Tempstar, Comfortmaker, and Arcoaire. Utilizing a genuine 1171481 sensor ensures compatible resistance values and switching points, preventing common issues like "nuisance defrosting" or complete coil freeze-ups that stress the compressor and decrease overall SEER ratings. For technicians, this part offers a direct-fit solution for restoring automated defrost cycle logic in commercial and residential units.
Key Benefits:
- Precision Switching: The O80 C30 logic ensures the defrost cycle terminates exactly at 80?F, preventing unnecessary auxiliary heat usage.
- OEM Compatibility: Guaranteed fit for ICP Heil Quaker equipment, eliminating the calibration risks associated with universal defrost thermostats.
- System Protection: Reliable coil temperature monitoring prevents a solid block of ice from forming, protecting the fan motor and reversing valve.
- Energy Efficiency: Maintains optimal heat pump performance by ensuring defrosting only occurs when the coil surface reaches the 30?F threshold.
Common Questions:
How do I test the ICP 1171481 sensor in the field?
Using a multimeter set to ohms, check for continuity. At room temperature, this sensor should be open (no continuity). To test the closing point, the sensor must be cooled below 30?F?often achieved using a freezing spray or ice bath?at which point it should show 0 ohms.
What are the symptoms of a failing defrost sensor?
Technicians typically look for a heavily iced outdoor coil while the system remains in heat mode, or a unit that stays in defrost mode too long, leading to excessive steam and lack of indoor heat. If the sensor is stuck open, the defrost board will never receive the signal to start the timer.
Does this part work with all ICP brands?
Yes, the 1171481 is the standard OEM defrost sensor for many units under the Heil, Tempstar, KeepRite, and Comfortmaker umbrellas. Always verify the L-code or O/C temperatures on the original housing before replacement.
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.
Original: $30.94
-65%$30.94
$10.83Heil Quaker ICP 1171481 Defrost Sensor
The Heil Quaker ICP 1171481 Defrost Sensor is a critical OEM replacement part designed for International Comfort Products (ICP) heat pump systems. This O80 C30 sensor functions as a limit switch within the defrost control sequence, engineered to close at 30?F to initiate the timing circuit and open at 80?F to terminate the cycle. By precisely monitoring the evaporator coil temperature, it prevents excessive ice buildup on the outdoor coil, ensuring the system maintains high thermal transfer efficiency during low-ambient heating operations. Built for rugged field conditions, this HVAC temperature sensor integrates seamlessly with existing defrost boards across brands including Heil, Tempstar, Comfortmaker, and Arcoaire. Utilizing a genuine 1171481 sensor ensures compatible resistance values and switching points, preventing common issues like "nuisance defrosting" or complete coil freeze-ups that stress the compressor and decrease overall SEER ratings. For technicians, this part offers a direct-fit solution for restoring automated defrost cycle logic in commercial and residential units.
Key Benefits:
- Precision Switching: The O80 C30 logic ensures the defrost cycle terminates exactly at 80?F, preventing unnecessary auxiliary heat usage.
- OEM Compatibility: Guaranteed fit for ICP Heil Quaker equipment, eliminating the calibration risks associated with universal defrost thermostats.
- System Protection: Reliable coil temperature monitoring prevents a solid block of ice from forming, protecting the fan motor and reversing valve.
- Energy Efficiency: Maintains optimal heat pump performance by ensuring defrosting only occurs when the coil surface reaches the 30?F threshold.
Common Questions:
How do I test the ICP 1171481 sensor in the field?
Using a multimeter set to ohms, check for continuity. At room temperature, this sensor should be open (no continuity). To test the closing point, the sensor must be cooled below 30?F?often achieved using a freezing spray or ice bath?at which point it should show 0 ohms.
What are the symptoms of a failing defrost sensor?
Technicians typically look for a heavily iced outdoor coil while the system remains in heat mode, or a unit that stays in defrost mode too long, leading to excessive steam and lack of indoor heat. If the sensor is stuck open, the defrost board will never receive the signal to start the timer.
Does this part work with all ICP brands?
Yes, the 1171481 is the standard OEM defrost sensor for many units under the Heil, Tempstar, KeepRite, and Comfortmaker umbrellas. Always verify the L-code or O/C temperatures on the original housing before replacement.
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.
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Description
The Heil Quaker ICP 1171481 Defrost Sensor is a critical OEM replacement part designed for International Comfort Products (ICP) heat pump systems. This O80 C30 sensor functions as a limit switch within the defrost control sequence, engineered to close at 30?F to initiate the timing circuit and open at 80?F to terminate the cycle. By precisely monitoring the evaporator coil temperature, it prevents excessive ice buildup on the outdoor coil, ensuring the system maintains high thermal transfer efficiency during low-ambient heating operations. Built for rugged field conditions, this HVAC temperature sensor integrates seamlessly with existing defrost boards across brands including Heil, Tempstar, Comfortmaker, and Arcoaire. Utilizing a genuine 1171481 sensor ensures compatible resistance values and switching points, preventing common issues like "nuisance defrosting" or complete coil freeze-ups that stress the compressor and decrease overall SEER ratings. For technicians, this part offers a direct-fit solution for restoring automated defrost cycle logic in commercial and residential units.
Key Benefits:
- Precision Switching: The O80 C30 logic ensures the defrost cycle terminates exactly at 80?F, preventing unnecessary auxiliary heat usage.
- OEM Compatibility: Guaranteed fit for ICP Heil Quaker equipment, eliminating the calibration risks associated with universal defrost thermostats.
- System Protection: Reliable coil temperature monitoring prevents a solid block of ice from forming, protecting the fan motor and reversing valve.
- Energy Efficiency: Maintains optimal heat pump performance by ensuring defrosting only occurs when the coil surface reaches the 30?F threshold.
Common Questions:
How do I test the ICP 1171481 sensor in the field?
Using a multimeter set to ohms, check for continuity. At room temperature, this sensor should be open (no continuity). To test the closing point, the sensor must be cooled below 30?F?often achieved using a freezing spray or ice bath?at which point it should show 0 ohms.
What are the symptoms of a failing defrost sensor?
Technicians typically look for a heavily iced outdoor coil while the system remains in heat mode, or a unit that stays in defrost mode too long, leading to excessive steam and lack of indoor heat. If the sensor is stuck open, the defrost board will never receive the signal to start the timer.
Does this part work with all ICP brands?
Yes, the 1171481 is the standard OEM defrost sensor for many units under the Heil, Tempstar, KeepRite, and Comfortmaker umbrellas. Always verify the L-code or O/C temperatures on the original housing before replacement.
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.
