Description
The Lennox 63W57 is an OEM replacement pressure switch engineered to deliver reliable, precise protection for Lennox heating and cooling systems. Featuring a Single Pole Single Throw (SPST) configuration, this switch monitors system air pressure to safeguard the heat exchanger and combustion components from unsafe operating conditions.
How It Works
The pressure switch continuously monitors the negative pressure (draft) produced by the inducer motor. If pressure falls outside the acceptable range, the switch opens the control circuit, preventing the system from firing and protecting against potential heat exchanger damage, flue gas spillage, or unsafe combustion.
Key Specifications
- OEM Part Number: 63W57
- Brand: Lennox
- Switch Type: Single Pole Single Throw (SPST)
- Open Set Point: .55″ W.C.
- Close Set Point: .95″ W.C.
- Application: Lennox furnace/air handler pressure sensing circuit
Features & Benefits
- OEM Lennox replacement part for direct, drop-in compatibility
- SPST design provides simple, reliable open/close switching action
- Calibrated set points (.55″wc open / .95″wc close) ensure accurate pressure monitoring
- Protects heat exchanger and combustion system from unsafe draft conditions
- Helps maintain system efficiency and prolongs equipment life
- Easy installation — designed to match original factory specifications
Application
This pressure switch is designed for use in Lennox gas furnaces and air handlers where draft inducer pressure monitoring is required. Always verify compatibility with your specific Lennox model before installation. Consult your equipment’s service manual for proper wiring and set-point requirements.
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