Lennox 17W11 Defrost Thermostat
The Lennox 17W11 Defrost Thermostat is a critical OEM replacement part designed to regulate the defrost cycle in high-efficiency heat pump systems. Engineered for precise temperature monitoring, this Lennox L60-31F sensor prevents seasonal ice accumulation on the outdoor evaporator coil, ensuring consistent heat transfer and protecting the HVAC compressor from liquid slugging. As an SPST switch, it operates on a fixed temperature differential, programmed to open at 30°F and close at 15°F. This logic allows the defrost control board to initiate a shift from heating to a temporary cooling mode, utilizing hot gas to clear frost before returning to normal operation. With its 12-inch leads and plug-and-play profile, technicians can quickly restore heat pump performance during extreme winter conditions. This defrost thermostat replacement is essential for maintaining system COP and preventing the unit from locking out due to restricted airflow caused by coil freezing.
Key Benefits- Optimized Efficiency: Triggers defrost cycles only when coil temperatures drop below 15°F, reducing unnecessary energy consumption.
- Equipment Longevity: Prevents excessive frost buildup which can lead to motor strain and primary compressor failure.
- Verified Compatibility: Directly replaces model 100503-04 and integrates seamlessly with standard Lennox defrost controls.
- Rugged Construction: Designed for high-vibration outdoor condenser environments with a moisture-resistant housing.
At what temperature does the Lennox 17W11 activate?
This thermostat is designed to close its contacts at 15°F (-9.4°C) to signal the need for a defrost cycle and will open once the coil temperature reaches 30°F (-1.1°C), terminating the cycle.
Is this part compatible with other HVAC brands?
While technically a L60-31F sensor, it is calibrated specifically for Lennox and Armstrong Air heat pumps. Always verify the 100503-04 part number on your existing sensor before installation.
Can I test this thermostat for continuity?
Yes, at room temperature, the switch should be open. To test the closing function, the sensor must be chilled below 15°F to verify if the SPST circuit completes.
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.
Original: $25.46
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Description
The Lennox 17W11 Defrost Thermostat is a critical OEM replacement part designed to regulate the defrost cycle in high-efficiency heat pump systems. Engineered for precise temperature monitoring, this Lennox L60-31F sensor prevents seasonal ice accumulation on the outdoor evaporator coil, ensuring consistent heat transfer and protecting the HVAC compressor from liquid slugging. As an SPST switch, it operates on a fixed temperature differential, programmed to open at 30°F and close at 15°F. This logic allows the defrost control board to initiate a shift from heating to a temporary cooling mode, utilizing hot gas to clear frost before returning to normal operation. With its 12-inch leads and plug-and-play profile, technicians can quickly restore heat pump performance during extreme winter conditions. This defrost thermostat replacement is essential for maintaining system COP and preventing the unit from locking out due to restricted airflow caused by coil freezing.
Key Benefits- Optimized Efficiency: Triggers defrost cycles only when coil temperatures drop below 15°F, reducing unnecessary energy consumption.
- Equipment Longevity: Prevents excessive frost buildup which can lead to motor strain and primary compressor failure.
- Verified Compatibility: Directly replaces model 100503-04 and integrates seamlessly with standard Lennox defrost controls.
- Rugged Construction: Designed for high-vibration outdoor condenser environments with a moisture-resistant housing.
At what temperature does the Lennox 17W11 activate?
This thermostat is designed to close its contacts at 15°F (-9.4°C) to signal the need for a defrost cycle and will open once the coil temperature reaches 30°F (-1.1°C), terminating the cycle.
Is this part compatible with other HVAC brands?
While technically a L60-31F sensor, it is calibrated specifically for Lennox and Armstrong Air heat pumps. Always verify the 100503-04 part number on your existing sensor before installation.
Can I test this thermostat for continuity?
Yes, at room temperature, the switch should be open. To test the closing function, the sensor must be chilled below 15°F to verify if the SPST circuit completes.
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.
