Description
The Lennox 10U94 is a Single-Pole Single-Throw (SPST) pressure switch engineered to a precise set point of 0.90 inches water column (.90″wc). Designed as a direct OEM replacement for compatible Lennox heating systems, this pressure switch plays a critical role in verifying proper inducer draft before allowing ignition to proceed — protecting both equipment and occupants from unsafe operating conditions.
How It Works
The pressure switch monitors negative pressure (vacuum) generated by the draft inducer motor. When the inducer establishes sufficient airflow and the sensed pressure meets or exceeds the .90″wc set point, the SPST switch closes, signaling the control board to continue the ignition sequence. If proper draft is not confirmed, the switch remains open and the system locks out — preventing ignition in potentially hazardous flue conditions.
Key Features
- Set point: 0.90 inches water column (.90″wc)
- Switch type: Single-Pole Single-Throw (SPST)
- OEM Lennox replacement part — SKU 10U94
- Monitors inducer draft to ensure safe furnace operation
- Locks out ignition sequence if adequate draft pressure is not achieved
- Direct drop-in replacement for compatible Lennox furnace models
Application
The Lennox 10U94 pressure switch is intended for use in Lennox gas furnaces and air handlers that require draft-proving protection. Always verify compatibility with the specific furnace model and existing pressure switch specifications before installation. Consult the equipment service manual or contact a qualified HVAC technician for proper replacement guidance.
Why Choose OEM Replacement Parts?
Using genuine Lennox OEM components like the 10U94 ensures the replacement part meets the exact electrical and mechanical specifications of the original equipment — helping to maintain system efficiency, warranty compliance, and long-term reliability.
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