Lennox 14A46 Pressure Switch
The Lennox 14A46 Pressure Switch is a critical OEM replacement part designed for high-efficiency, multi-stage HVAC systems. This 2-stage pressure switch (Model 104549-04) is factory-calibrated to monitor vital combustion air pressures, ensuring the inducer motor is moving the correct volume of air for safe ignition and operation. With a high set point of 0.81" W.C. and a low set point of 0.45" W.C., this dual-stage pressure switch provides the precision required for Lennox furnace repair and maintenance. Utilizing a SPST-NO contact configuration rated at 5A resistive at 24V AC, it effectively signals the integrated furnace control to modulate or shut down based on real-time vacuum readings. For technicians troubleshooting pressure switch codes, this component offers a direct-fit solution to restore HVAC system performance without the drift issues common in universal aftermarket alternatives. Its robust diaphragm and housing are built for the thermal cycles and vibrations typical of heavy-duty residential and commercial applications.
Key Benefits- Exact OEM Calibration: Pre-set at 0.81" and 0.45" W.C. to match specific Lennox furnace airflow requirements for 2-stage firing.
- System Reliability: Prevents furnace operation during venting obstructions or inducer failures, protecting the heat exchanger.
- Universal Commercial Fit: Compatible with various Lennox and Armstrong Air models requiring part number 104549-04.
- High-Grade Electrical Contacts: 5-Amp 24VAC resistive rating ensures long-term switching stability.
What are the symptoms of a failing Lennox 14A46 pressure switch?
Common indicators include a furnace that cycles the inducer motor but fails to ignite, or an LED diagnostic code indicating a pressure switch circuit stuck open or closed.
Can I use a single-stage switch to replace this 2-stage model?
No. This component is specifically designed for 2-stage heating systems that rely on differentiated pressure readings for high and low fire modes.
Does this switch come with a bracket for installation?
This product is the switch assembly as pictured; existing mounting brackets should be retained from the failed unit for proper orientation.
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: $58.08
-65%$58.08
$20.33Lennox 14A46 Pressure Switch
The Lennox 14A46 Pressure Switch is a critical OEM replacement part designed for high-efficiency, multi-stage HVAC systems. This 2-stage pressure switch (Model 104549-04) is factory-calibrated to monitor vital combustion air pressures, ensuring the inducer motor is moving the correct volume of air for safe ignition and operation. With a high set point of 0.81" W.C. and a low set point of 0.45" W.C., this dual-stage pressure switch provides the precision required for Lennox furnace repair and maintenance. Utilizing a SPST-NO contact configuration rated at 5A resistive at 24V AC, it effectively signals the integrated furnace control to modulate or shut down based on real-time vacuum readings. For technicians troubleshooting pressure switch codes, this component offers a direct-fit solution to restore HVAC system performance without the drift issues common in universal aftermarket alternatives. Its robust diaphragm and housing are built for the thermal cycles and vibrations typical of heavy-duty residential and commercial applications.
Key Benefits- Exact OEM Calibration: Pre-set at 0.81" and 0.45" W.C. to match specific Lennox furnace airflow requirements for 2-stage firing.
- System Reliability: Prevents furnace operation during venting obstructions or inducer failures, protecting the heat exchanger.
- Universal Commercial Fit: Compatible with various Lennox and Armstrong Air models requiring part number 104549-04.
- High-Grade Electrical Contacts: 5-Amp 24VAC resistive rating ensures long-term switching stability.
What are the symptoms of a failing Lennox 14A46 pressure switch?
Common indicators include a furnace that cycles the inducer motor but fails to ignite, or an LED diagnostic code indicating a pressure switch circuit stuck open or closed.
Can I use a single-stage switch to replace this 2-stage model?
No. This component is specifically designed for 2-stage heating systems that rely on differentiated pressure readings for high and low fire modes.
Does this switch come with a bracket for installation?
This product is the switch assembly as pictured; existing mounting brackets should be retained from the failed unit for proper orientation.
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 Lennox 14A46 Pressure Switch is a critical OEM replacement part designed for high-efficiency, multi-stage HVAC systems. This 2-stage pressure switch (Model 104549-04) is factory-calibrated to monitor vital combustion air pressures, ensuring the inducer motor is moving the correct volume of air for safe ignition and operation. With a high set point of 0.81" W.C. and a low set point of 0.45" W.C., this dual-stage pressure switch provides the precision required for Lennox furnace repair and maintenance. Utilizing a SPST-NO contact configuration rated at 5A resistive at 24V AC, it effectively signals the integrated furnace control to modulate or shut down based on real-time vacuum readings. For technicians troubleshooting pressure switch codes, this component offers a direct-fit solution to restore HVAC system performance without the drift issues common in universal aftermarket alternatives. Its robust diaphragm and housing are built for the thermal cycles and vibrations typical of heavy-duty residential and commercial applications.
Key Benefits- Exact OEM Calibration: Pre-set at 0.81" and 0.45" W.C. to match specific Lennox furnace airflow requirements for 2-stage firing.
- System Reliability: Prevents furnace operation during venting obstructions or inducer failures, protecting the heat exchanger.
- Universal Commercial Fit: Compatible with various Lennox and Armstrong Air models requiring part number 104549-04.
- High-Grade Electrical Contacts: 5-Amp 24VAC resistive rating ensures long-term switching stability.
What are the symptoms of a failing Lennox 14A46 pressure switch?
Common indicators include a furnace that cycles the inducer motor but fails to ignite, or an LED diagnostic code indicating a pressure switch circuit stuck open or closed.
Can I use a single-stage switch to replace this 2-stage model?
No. This component is specifically designed for 2-stage heating systems that rely on differentiated pressure readings for high and low fire modes.
Does this switch come with a bracket for installation?
This product is the switch assembly as pictured; existing mounting brackets should be retained from the failed unit for proper orientation.
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.
