Lennox 24W49 Pressure Switch
The Lennox 24W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the induced draft blower operation. This OEM Lennox replacement part, identified by part number 101021-04, is factory-calibrated with a set point of -0.70" WC PF / -1.05" WC. It ensures the combustion process is vented correctly before allowing the gas valve to energize. Built with a durable diaphragm and precise electrical contacts, this HVAC furnace pressure switch prevents operation during venting obstructions or inducer motor failure. When diagnosing a pressure switch stuck open or a limit circuit error, verifying the specific differential pressure rating is essential. This switch is engineered for high-heat environments and maintains signal integrity over extensive cycles. For contractors, utilizing an authentic Lennox 24W49 ensures the system remains within the manufacturer’s programmed safety parameters, maintaining efficient combustion and preventing nuisance trips in high-efficiency condensing units.
- Precision Set Points: Factory-set at -0.70" WC (Pick-up) and -1.05" WC (Fall) for accurate pressure differential monitoring.
- OEM Compatibility: Direct replacement for Lennox part 101021-04, ensuring exact fitment in the inducer housing or bracket.
- Enhanced Safety: High-reliability contacts prevent ignition if the exhaust flue is blocked or the inducer fan underperforms.
- Rugged Construction: Designed to withstand the moisture and temperature fluctuations common in high-efficiency furnace cabinets.
Common Installation Questions
What does a -0.70/-1.05 rating signify?
This indicates the inches of water column at which the switch closes to prove draft and opens if the pressure drops below the secondary threshold, protecting the heat exchanger.
Can I use a universal pressure switch instead of the 24W49?
Technicians should use the OEM 24W49 to ensure the specific 1.05" WC drop-out point matches the original furnace control board logic and blower curve.
What are the signs of a failing Lennox 101021-04?
Common indicators include the inducer motor running continuously without the burners igniting, or diagnostic LED codes indicating a pressure switch circuit failure.
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 24W49 Pressure Switch
The Lennox 24W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the induced draft blower operation. This OEM Lennox replacement part, identified by part number 101021-04, is factory-calibrated with a set point of -0.70" WC PF / -1.05" WC. It ensures the combustion process is vented correctly before allowing the gas valve to energize. Built with a durable diaphragm and precise electrical contacts, this HVAC furnace pressure switch prevents operation during venting obstructions or inducer motor failure. When diagnosing a pressure switch stuck open or a limit circuit error, verifying the specific differential pressure rating is essential. This switch is engineered for high-heat environments and maintains signal integrity over extensive cycles. For contractors, utilizing an authentic Lennox 24W49 ensures the system remains within the manufacturer’s programmed safety parameters, maintaining efficient combustion and preventing nuisance trips in high-efficiency condensing units.
- Precision Set Points: Factory-set at -0.70" WC (Pick-up) and -1.05" WC (Fall) for accurate pressure differential monitoring.
- OEM Compatibility: Direct replacement for Lennox part 101021-04, ensuring exact fitment in the inducer housing or bracket.
- Enhanced Safety: High-reliability contacts prevent ignition if the exhaust flue is blocked or the inducer fan underperforms.
- Rugged Construction: Designed to withstand the moisture and temperature fluctuations common in high-efficiency furnace cabinets.
Common Installation Questions
What does a -0.70/-1.05 rating signify?
This indicates the inches of water column at which the switch closes to prove draft and opens if the pressure drops below the secondary threshold, protecting the heat exchanger.
Can I use a universal pressure switch instead of the 24W49?
Technicians should use the OEM 24W49 to ensure the specific 1.05" WC drop-out point matches the original furnace control board logic and blower curve.
What are the signs of a failing Lennox 101021-04?
Common indicators include the inducer motor running continuously without the burners igniting, or diagnostic LED codes indicating a pressure switch circuit failure.
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 24W49 Pressure Switch is a critical safety component designed for specific Lennox furnace models to monitor the induced draft blower operation. This OEM Lennox replacement part, identified by part number 101021-04, is factory-calibrated with a set point of -0.70" WC PF / -1.05" WC. It ensures the combustion process is vented correctly before allowing the gas valve to energize. Built with a durable diaphragm and precise electrical contacts, this HVAC furnace pressure switch prevents operation during venting obstructions or inducer motor failure. When diagnosing a pressure switch stuck open or a limit circuit error, verifying the specific differential pressure rating is essential. This switch is engineered for high-heat environments and maintains signal integrity over extensive cycles. For contractors, utilizing an authentic Lennox 24W49 ensures the system remains within the manufacturer’s programmed safety parameters, maintaining efficient combustion and preventing nuisance trips in high-efficiency condensing units.
- Precision Set Points: Factory-set at -0.70" WC (Pick-up) and -1.05" WC (Fall) for accurate pressure differential monitoring.
- OEM Compatibility: Direct replacement for Lennox part 101021-04, ensuring exact fitment in the inducer housing or bracket.
- Enhanced Safety: High-reliability contacts prevent ignition if the exhaust flue is blocked or the inducer fan underperforms.
- Rugged Construction: Designed to withstand the moisture and temperature fluctuations common in high-efficiency furnace cabinets.
Common Installation Questions
What does a -0.70/-1.05 rating signify?
This indicates the inches of water column at which the switch closes to prove draft and opens if the pressure drops below the secondary threshold, protecting the heat exchanger.
Can I use a universal pressure switch instead of the 24W49?
Technicians should use the OEM 24W49 to ensure the specific 1.05" WC drop-out point matches the original furnace control board logic and blower curve.
What are the signs of a failing Lennox 101021-04?
Common indicators include the inducer motor running continuously without the burners igniting, or diagnostic LED codes indicating a pressure switch circuit failure.
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.
