Description
Lennox 82M33 Pressure Switch Overview
The Lennox 82M33 is an OEM-quality pressure switch engineered for reliable draft and combustion air proving in Lennox furnace and HVAC applications. With a 1.25″ water column (wc) set point, this switch monitors system pressure to confirm safe operating conditions before allowing ignition to proceed — protecting both equipment and occupants from unsafe operation.
Key Features
- Set Point: 1.25″ water column (wc)
- Switch Type: SPST (Single-Pole, Single-Throw)
- Connections: Dual 1/4″ barb fittings for easy hose attachment
- OEM Lennox replacement part — direct-fit for compatible Lennox systems
- Monitors inducer/draft pressure to verify safe venting before ignition
- Helps prevent unsafe furnace operation due to blocked flue or inducer failure
Application
The 82M33 pressure switch is designed as a direct OEM replacement for compatible Lennox furnaces and air handlers. It is typically wired into the furnace control circuit to prove that the draft inducer is operating correctly and that flue gases are being properly exhausted. If the required pressure differential is not achieved, the switch prevents ignition — a critical safety function in modern high-efficiency heating systems.
Why Choose the Lennox 82M33
- Genuine Lennox OEM part for assured compatibility and performance
- SPST switching action provides simple, reliable circuit control
- Dual 1/4″ barb connections accommodate standard pressure tubing
- 1.25″ wc set point calibrated for precise pressure sensing
- Helps maintain system safety and efficiency
- Straightforward installation for qualified HVAC technicians
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