Description
Lennox 11U66 .55 w.c. Pressure Switch Overview
The Lennox 11U66 is a .55 inches water column (w.c.) pressure switch engineered as a direct OEM replacement for compatible Lennox heating systems. Pressure switches play a critical safety role in gas furnaces and air handlers — they verify that the inducer motor is operating correctly and that proper draft pressure is established before allowing the ignition sequence to proceed. If the required pressure is not detected, the switch interrupts the control circuit, preventing unsafe furnace operation.
Key Features
- Set point rating of .55 inches water column (w.c.)
- Designed as a direct OEM replacement for compatible Lennox furnace models
- Monitors inducer/draft pressure to ensure safe ignition sequencing
- Interrupts control circuit if adequate pressure is not established
- Helps protect against incomplete combustion and unsafe furnace operation
- Durable construction for long-lasting, dependable performance
Application
This pressure switch is intended for use in Lennox gas furnaces and similar heating equipment that require a .55 w.c. pressure switch. Always verify compatibility with your specific Lennox model before installation. Consult the equipment’s service manual or contact a qualified HVAC technician to confirm the correct replacement part.
Why Choose OEM Lennox Parts?
Using genuine or OEM-equivalent Lennox replacement parts helps maintain system efficiency, preserves equipment warranties, and ensures the safety controls function as originally designed. The Lennox 11U66 pressure switch is a reliable solution for restoring proper furnace operation quickly and confidently.
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