
Reznor 171750 Sensing Tube
The Reznor 171750 Sensing Tube is a critical OEM replacement part designed for precision pressure monitoring within Reznor gas-fired unit heaters. As a veteran-grade HVAC replacement component, this sensing tube connects the burner’s combustion environment to the pressure switch, ensuring the system maintains a safe air-to-fuel ratio. In the field, a clogged or cracked pneumatic line—often caused by hairline fractures or carbon buildup—will lead to nuisance trips and pressure switch failure. This genuine Reznor 171750 provides the exact unit heater sensing tube dimensions required for bypass-free installation, maintaining the specific static pressure readings necessary for the venter motor to prove the draft. When performing gas heater troubleshooting, replacing a compromised sensing tube is non-negotiable for system safety and combustion Efficiency. This part ensures the control board receives accurate pneumatic signals to authorize the ignition sequence, preventing "no-heat" calls during peak demand.
Key Benefits- Optimized Pressure Accuracy: Designed to provide precise pneumatic feedback to the pressure switch, preventing intermittent ignition cycles.
- Industrial Grade Materials: Constructed to withstand high-temperature fluctuations and chemical exposure within the combustion chamber.
- Exact OEM Fit: Eliminates the need for field-rigged tubing and ensures a leak-proof connection at the switch barb.
- Enhanced System Reliability: Restores proper HVAC system diagnostics by ensuring the draft is accurately proven every cycle.
What are the symptoms of a bad Reznor 171750 sensing tube?
If the tube is cracked or blocked by debris, the pressure switch will fail to close. You will likely see the venter motor run continuously without the main burner ever igniting.
Is this part compatible with high-altitude pressure switch kits?
Yes, the 171750 sensing tube is the standard line used for connecting both standard and high-altitude Reznor pressure switches in UDAP and UDX-style units.
How do I clear a blocked sensing tube in the field?
While some technicians use compressed air, it is safer to replace the tube. Micro-cracks in old tubing can cause signal loss that is difficult to detect during standard unit heater maintenance.
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.
Reznor 171750 Sensing Tube
The Reznor 171750 Sensing Tube is a critical OEM replacement part designed for precision pressure monitoring within Reznor gas-fired unit heaters. As a veteran-grade HVAC replacement component, this sensing tube connects the burner’s combustion environment to the pressure switch, ensuring the system maintains a safe air-to-fuel ratio. In the field, a clogged or cracked pneumatic line—often caused by hairline fractures or carbon buildup—will lead to nuisance trips and pressure switch failure. This genuine Reznor 171750 provides the exact unit heater sensing tube dimensions required for bypass-free installation, maintaining the specific static pressure readings necessary for the venter motor to prove the draft. When performing gas heater troubleshooting, replacing a compromised sensing tube is non-negotiable for system safety and combustion Efficiency. This part ensures the control board receives accurate pneumatic signals to authorize the ignition sequence, preventing "no-heat" calls during peak demand.
Key Benefits- Optimized Pressure Accuracy: Designed to provide precise pneumatic feedback to the pressure switch, preventing intermittent ignition cycles.
- Industrial Grade Materials: Constructed to withstand high-temperature fluctuations and chemical exposure within the combustion chamber.
- Exact OEM Fit: Eliminates the need for field-rigged tubing and ensures a leak-proof connection at the switch barb.
- Enhanced System Reliability: Restores proper HVAC system diagnostics by ensuring the draft is accurately proven every cycle.
What are the symptoms of a bad Reznor 171750 sensing tube?
If the tube is cracked or blocked by debris, the pressure switch will fail to close. You will likely see the venter motor run continuously without the main burner ever igniting.
Is this part compatible with high-altitude pressure switch kits?
Yes, the 171750 sensing tube is the standard line used for connecting both standard and high-altitude Reznor pressure switches in UDAP and UDX-style units.
How do I clear a blocked sensing tube in the field?
While some technicians use compressed air, it is safer to replace the tube. Micro-cracks in old tubing can cause signal loss that is difficult to detect during standard unit heater maintenance.
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.
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Description
The Reznor 171750 Sensing Tube is a critical OEM replacement part designed for precision pressure monitoring within Reznor gas-fired unit heaters. As a veteran-grade HVAC replacement component, this sensing tube connects the burner’s combustion environment to the pressure switch, ensuring the system maintains a safe air-to-fuel ratio. In the field, a clogged or cracked pneumatic line—often caused by hairline fractures or carbon buildup—will lead to nuisance trips and pressure switch failure. This genuine Reznor 171750 provides the exact unit heater sensing tube dimensions required for bypass-free installation, maintaining the specific static pressure readings necessary for the venter motor to prove the draft. When performing gas heater troubleshooting, replacing a compromised sensing tube is non-negotiable for system safety and combustion Efficiency. This part ensures the control board receives accurate pneumatic signals to authorize the ignition sequence, preventing "no-heat" calls during peak demand.
Key Benefits- Optimized Pressure Accuracy: Designed to provide precise pneumatic feedback to the pressure switch, preventing intermittent ignition cycles.
- Industrial Grade Materials: Constructed to withstand high-temperature fluctuations and chemical exposure within the combustion chamber.
- Exact OEM Fit: Eliminates the need for field-rigged tubing and ensures a leak-proof connection at the switch barb.
- Enhanced System Reliability: Restores proper HVAC system diagnostics by ensuring the draft is accurately proven every cycle.
What are the symptoms of a bad Reznor 171750 sensing tube?
If the tube is cracked or blocked by debris, the pressure switch will fail to close. You will likely see the venter motor run continuously without the main burner ever igniting.
Is this part compatible with high-altitude pressure switch kits?
Yes, the 171750 sensing tube is the standard line used for connecting both standard and high-altitude Reznor pressure switches in UDAP and UDX-style units.
How do I clear a blocked sensing tube in the field?
While some technicians use compressed air, it is safer to replace the tube. Micro-cracks in old tubing can cause signal loss that is difficult to detect during standard unit heater maintenance.
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.












