Utica-Dunkirk 240009339 Sensor
The Utica-Dunkirk 240009339 Sensor is a critical OEM component for hydronic heating systems requiring high-precision temperature monitoring. This 24-inch hot water sensor is a direct replacement part engineered specifically for L7221 and L7248 Aquastat controls. As a veteran-grade boiler temperature sensor, it provides the low-voltage resistance feedback necessary for the control board to manage ignition cycles and high-limit safety protocols effectively. When troubleshooting "sensor open" or "sensor shorted" error codes on Utica or Dunkirk cast iron boilers, installing this genuine HVAC replacement sensor ensures the thermistor curve matches the original factory specifications. The 24-inch lead length allows for proper routing through the cabinet to the immersion well, maintaining a secure connection without tension. Bypassing generic alternatives in favor of this OEM Utica boiler part prevents erratic high-limit tripping and maintains the integrity of the hydronic HW sensor circuit.
Key Benefits for Contractors
- Precision Compatibility: Designed for seamless integration with Honeywell L7221 and L7248 electronic Aquastats found in Dunkirk and Utica boiler models.
- OEM Reliability: Ensures accurate NTC thermistor readings, preventing the common calibration drift issues associated with aftermarket probes.
- Standardized Fit: The 24-inch hot water (HW) sensor lead provides sufficient length for standard immersion well applications in residential heating systems.
- Optimized Performance: Maintains precise thermal logic for hydronic control systems, supporting the boiler's modulation and efficiency targets.
Common Technical Questions
Which boiler models are compatible with the 240009339 sensor?
This Utica-Dunkirk 240009339 Sensor is designed for a variety of gas-fired and oil-fired boilers using the L7221 or L7248 control platform. It is a standard replacement for many Dunkirk and Utica hydronic units requiring a 24-inch probe.
How do I identify a failing boiler sensor?
Common symptoms include the control board displaying specific sensor-related fault codes, the boiler failing to fire despite a call for heat, or inaccurate temperature readings on the digital display. Testing the resistance of the L7221/L7248 compatible sensor against the manufacturer's ohm chart is the recommended diagnostic step.
Is the immersion well included with this part?
The 240009339 is the hot water sensor probe and lead assembly only. If the existing immersion well is scaled or damaged, it should be cleaned or replaced separately to ensure proper thermal transfer to the new sensor.
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: $42.43
-65%$42.43
$14.85Utica-Dunkirk 240009339 Sensor
The Utica-Dunkirk 240009339 Sensor is a critical OEM component for hydronic heating systems requiring high-precision temperature monitoring. This 24-inch hot water sensor is a direct replacement part engineered specifically for L7221 and L7248 Aquastat controls. As a veteran-grade boiler temperature sensor, it provides the low-voltage resistance feedback necessary for the control board to manage ignition cycles and high-limit safety protocols effectively. When troubleshooting "sensor open" or "sensor shorted" error codes on Utica or Dunkirk cast iron boilers, installing this genuine HVAC replacement sensor ensures the thermistor curve matches the original factory specifications. The 24-inch lead length allows for proper routing through the cabinet to the immersion well, maintaining a secure connection without tension. Bypassing generic alternatives in favor of this OEM Utica boiler part prevents erratic high-limit tripping and maintains the integrity of the hydronic HW sensor circuit.
Key Benefits for Contractors
- Precision Compatibility: Designed for seamless integration with Honeywell L7221 and L7248 electronic Aquastats found in Dunkirk and Utica boiler models.
- OEM Reliability: Ensures accurate NTC thermistor readings, preventing the common calibration drift issues associated with aftermarket probes.
- Standardized Fit: The 24-inch hot water (HW) sensor lead provides sufficient length for standard immersion well applications in residential heating systems.
- Optimized Performance: Maintains precise thermal logic for hydronic control systems, supporting the boiler's modulation and efficiency targets.
Common Technical Questions
Which boiler models are compatible with the 240009339 sensor?
This Utica-Dunkirk 240009339 Sensor is designed for a variety of gas-fired and oil-fired boilers using the L7221 or L7248 control platform. It is a standard replacement for many Dunkirk and Utica hydronic units requiring a 24-inch probe.
How do I identify a failing boiler sensor?
Common symptoms include the control board displaying specific sensor-related fault codes, the boiler failing to fire despite a call for heat, or inaccurate temperature readings on the digital display. Testing the resistance of the L7221/L7248 compatible sensor against the manufacturer's ohm chart is the recommended diagnostic step.
Is the immersion well included with this part?
The 240009339 is the hot water sensor probe and lead assembly only. If the existing immersion well is scaled or damaged, it should be cleaned or replaced separately to ensure proper thermal transfer to the new sensor.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Utica-Dunkirk 240009339 Sensor is a critical OEM component for hydronic heating systems requiring high-precision temperature monitoring. This 24-inch hot water sensor is a direct replacement part engineered specifically for L7221 and L7248 Aquastat controls. As a veteran-grade boiler temperature sensor, it provides the low-voltage resistance feedback necessary for the control board to manage ignition cycles and high-limit safety protocols effectively. When troubleshooting "sensor open" or "sensor shorted" error codes on Utica or Dunkirk cast iron boilers, installing this genuine HVAC replacement sensor ensures the thermistor curve matches the original factory specifications. The 24-inch lead length allows for proper routing through the cabinet to the immersion well, maintaining a secure connection without tension. Bypassing generic alternatives in favor of this OEM Utica boiler part prevents erratic high-limit tripping and maintains the integrity of the hydronic HW sensor circuit.
Key Benefits for Contractors
- Precision Compatibility: Designed for seamless integration with Honeywell L7221 and L7248 electronic Aquastats found in Dunkirk and Utica boiler models.
- OEM Reliability: Ensures accurate NTC thermistor readings, preventing the common calibration drift issues associated with aftermarket probes.
- Standardized Fit: The 24-inch hot water (HW) sensor lead provides sufficient length for standard immersion well applications in residential heating systems.
- Optimized Performance: Maintains precise thermal logic for hydronic control systems, supporting the boiler's modulation and efficiency targets.
Common Technical Questions
Which boiler models are compatible with the 240009339 sensor?
This Utica-Dunkirk 240009339 Sensor is designed for a variety of gas-fired and oil-fired boilers using the L7221 or L7248 control platform. It is a standard replacement for many Dunkirk and Utica hydronic units requiring a 24-inch probe.
How do I identify a failing boiler sensor?
Common symptoms include the control board displaying specific sensor-related fault codes, the boiler failing to fire despite a call for heat, or inaccurate temperature readings on the digital display. Testing the resistance of the L7221/L7248 compatible sensor against the manufacturer's ohm chart is the recommended diagnostic step.
Is the immersion well included with this part?
The 240009339 is the hot water sensor probe and lead assembly only. If the existing immersion well is scaled or damaged, it should be cleaned or replaced separately to ensure proper thermal transfer to the new sensor.
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.
