Lennox 33W19 Pressure Switch
The Lennox 33W19 Pressure Switch is a high-precision, 2-stage dual pressure switch engineered for critical safety monitoring in gas furnaces and air handling units. This OEM component (part number 101599-03) features two independent, factory-calibrated set points to ensure the inducer motor is moving the correct volume of air for safe combustion. The high-stage set point is 1.37" W.C. while the low-stage set point is 0.30" W.C., providing accurate differential pressure sensing across multiple firing rates. Designed with a robust steel housing and SPST-N.O. contacts, it operates on a standard 24VAC control circuit and supports up to 5 element resistive loads. This HVAC dual pressure switch is a direct replacement for various Lennox, Armstrong, and Ducane models, effectively preventing system operation if venting obstructions or mechanical failures occur. As a veteran-grade furnace pressure switch, it offers reliable performance in demanding residential and light commercial environments.
Key Benefits:- Precise Multi-Stage Monitoring: Dual-diaphragm design accurately tracks high and low pressure differentials to manage 2-stage heating cycles.
- OEM Compatibility: Exact replacement for Lennox 33W19 and 101599-03, ensuring fitment without bracket modifications.
- Industrial-Grade Build: Features a steel enclosure and corrosion-resistant materials for long-term stability in high-temperature furnace cabinets.
- Enhanced Safety: Quick-acting SPST-N.O. configuration shuts down the ignition sequence instantly if air pressure drops below safe thresholds.
What are the pressure settings for the Lennox 33W19?
This switch is calibrated for a high set point of 1.37" W.C. and a low set point of 0.30" W.C.
Can I use this switch in a single-stage furnace?
No, the 33W19 is specifically designed for 2-stage systems that require dual-point pressure verification. Use an appropriate single-stage switch for those applications.
How do I troubleshoot a pressure switch error code?
Check for blocked flue vents, a failed inducer motor, or cracked tubing before replacing the switch. If the inducer is running but the switch does not close at 1.37" W.C., the component may require replacement.
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: $55.01
-65%$55.01
$19.25Lennox 33W19 Pressure Switch
The Lennox 33W19 Pressure Switch is a high-precision, 2-stage dual pressure switch engineered for critical safety monitoring in gas furnaces and air handling units. This OEM component (part number 101599-03) features two independent, factory-calibrated set points to ensure the inducer motor is moving the correct volume of air for safe combustion. The high-stage set point is 1.37" W.C. while the low-stage set point is 0.30" W.C., providing accurate differential pressure sensing across multiple firing rates. Designed with a robust steel housing and SPST-N.O. contacts, it operates on a standard 24VAC control circuit and supports up to 5 element resistive loads. This HVAC dual pressure switch is a direct replacement for various Lennox, Armstrong, and Ducane models, effectively preventing system operation if venting obstructions or mechanical failures occur. As a veteran-grade furnace pressure switch, it offers reliable performance in demanding residential and light commercial environments.
Key Benefits:- Precise Multi-Stage Monitoring: Dual-diaphragm design accurately tracks high and low pressure differentials to manage 2-stage heating cycles.
- OEM Compatibility: Exact replacement for Lennox 33W19 and 101599-03, ensuring fitment without bracket modifications.
- Industrial-Grade Build: Features a steel enclosure and corrosion-resistant materials for long-term stability in high-temperature furnace cabinets.
- Enhanced Safety: Quick-acting SPST-N.O. configuration shuts down the ignition sequence instantly if air pressure drops below safe thresholds.
What are the pressure settings for the Lennox 33W19?
This switch is calibrated for a high set point of 1.37" W.C. and a low set point of 0.30" W.C.
Can I use this switch in a single-stage furnace?
No, the 33W19 is specifically designed for 2-stage systems that require dual-point pressure verification. Use an appropriate single-stage switch for those applications.
How do I troubleshoot a pressure switch error code?
Check for blocked flue vents, a failed inducer motor, or cracked tubing before replacing the switch. If the inducer is running but the switch does not close at 1.37" W.C., the component may require replacement.
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 33W19 Pressure Switch is a high-precision, 2-stage dual pressure switch engineered for critical safety monitoring in gas furnaces and air handling units. This OEM component (part number 101599-03) features two independent, factory-calibrated set points to ensure the inducer motor is moving the correct volume of air for safe combustion. The high-stage set point is 1.37" W.C. while the low-stage set point is 0.30" W.C., providing accurate differential pressure sensing across multiple firing rates. Designed with a robust steel housing and SPST-N.O. contacts, it operates on a standard 24VAC control circuit and supports up to 5 element resistive loads. This HVAC dual pressure switch is a direct replacement for various Lennox, Armstrong, and Ducane models, effectively preventing system operation if venting obstructions or mechanical failures occur. As a veteran-grade furnace pressure switch, it offers reliable performance in demanding residential and light commercial environments.
Key Benefits:- Precise Multi-Stage Monitoring: Dual-diaphragm design accurately tracks high and low pressure differentials to manage 2-stage heating cycles.
- OEM Compatibility: Exact replacement for Lennox 33W19 and 101599-03, ensuring fitment without bracket modifications.
- Industrial-Grade Build: Features a steel enclosure and corrosion-resistant materials for long-term stability in high-temperature furnace cabinets.
- Enhanced Safety: Quick-acting SPST-N.O. configuration shuts down the ignition sequence instantly if air pressure drops below safe thresholds.
What are the pressure settings for the Lennox 33W19?
This switch is calibrated for a high set point of 1.37" W.C. and a low set point of 0.30" W.C.
Can I use this switch in a single-stage furnace?
No, the 33W19 is specifically designed for 2-stage systems that require dual-point pressure verification. Use an appropriate single-stage switch for those applications.
How do I troubleshoot a pressure switch error code?
Check for blocked flue vents, a failed inducer motor, or cracked tubing before replacing the switch. If the inducer is running but the switch does not close at 1.37" W.C., the component may require replacement.
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.
