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Lennox 78W57 - ( 101572-04 ) Pressure Switch, Actuates at 0.27" W.C.; Green Label

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78W57
Lennox 78W57 - ( 101572-04 ) Pressure Switch, Actuates at 0.27" W.C.; Green Label

Lennox 78W57 - ( 101572-04 ) Pressure Switch, Actuates at 0.27" W.C.; Green Label

SKU
78W57
Brand:
Reviews (0)
$205.40
Out of stock

(special order is available)

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This is a special order item and will ship with a minimum lead time of 14 days.

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Lennox 78W57 – (101572-04) Pressure Switch, Actuates at 0.27" W.C.; Green Label
 
The Lennox 78W57 Pressure Switch is a critical safety and operational component designed to ensure your HVAC system maintains optimal performance and safe functionality. As a factory-authorized replacement part, this pressure switch is engineered with precision calibration to actuate at 0.27 inches water column (W.C.), providing dependable monitoring of pressure differentials within your furnace or air handler system.
 
Detailed Features and Benefits:
  • Exact OEM Replacement
    Manufactured by Lennox to meet or exceed original equipment specifications, guaranteeing compatibility, reliability, and ease of installation in existing systems.
  • Precise Calibration (0.27” W.C.)
    The switch activates at 0.27” W.C., ensuring proper airflow detection to engage or disengage furnace operation. Prevents unsafe ignition if the inducer motor fails to establish correct draft pressure.
  • Color-Coded Green Label
    Features a distinctive green label for quick and accurate identification by technicians, reducing service time during diagnostics or part replacement.
  • Enhanced Safety Functionality
    Protects your HVAC system from operating under unsafe conditions by ensuring adequate draft pressure before allowing ignition or burner activation.
  • Durable and Reliable Construction
    Designed to withstand temperature changes, vibration, and humidity levels typical in residential and light commercial HVAC applications.
  • Easy Installation
    Comes pre-calibrated and ready to install with existing mounting configurations and electrical connectors for Lennox-compatible units.
Technical Specifications:
  • Part Number: 78W57
  • Manufacturer Number: 101572-04
  • Switch Type: Pressure Switch
  • Actuation Pressure: 0.27" Water Column
  • Label Color: Green
  • Mounting: Standard OEM mounting configuration
  • Application: Draft proving / airflow safety monitoring
Common Applications:
  • Furnaces requiring verification of adequate airflow or vent pressure before burner ignition
  • Systems needing fail-safe prevention to avoid combustion without proper draft
  • Replacement for failed or damaged switches to restore safety interlocks and system operation
Why Replace Your Pressure Switch?
 
A malfunctioning pressure switch can cause furnace lockouts, ignition failure, or unsafe operation. Replacing with an OEM Lennox switch ensures:
  • Proper airflow sensing
  • Correct system startup sequences
  • Compliance with manufacturer safety standards
  • Reduced downtime and callbacks for HVAC professionals
Order With Confidence
 
At Beenimax.com, we stock only genuine Lennox replacement parts, ensuring your HVAC repairs are done right the first time. Enjoy:
  • Fast shipping
  • Competitive pricing
  • Expert support for product compatibility
Upgrade your maintenance efficiency with the Lennox 78W57 Pressure Switch, available now to keep your systems running safely and efficiently.
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Package Quantity1 Item
Item ReturnsThis item can be returned
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