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The Lennox Pressure Switch, model 34M74, is designed to control the pressure within HVAC systems. This electronic switch ensures that the system operates efficiently. The Lennox brand is known for its reliable HVAC products. The 34M74 Pressure Switch has a pressure rating of .33 inches of water column (WC) and is a single pole single throw (SPST) switch.
This pressure switch is critical for maintaining the proper operation of heating and cooling systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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