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making it a solid choice for both residential and light commercial systems
Using this genuine ambient air sensor ensures the control logic maintains the correct resistance-to-temperature curve for optimal refrigerant flow and energy performance
Wide Series Compatibility: Fits a broad range of Sterling HVAC unit heaters
It indicates a "Close on" (automatic) reset logic where the switch opens at 150°F and closes automatically when the temperature cools
Lennox 33J88 Pressure Switch 30067439-890 making it a solid choiceThe Lennox 33J88 Pressure Switch is a critical safety component designed for precise draft monitoring in high efficiency gas furnaces. Rated for a set point of 4. 50" WC, this SPST (Single Pole Single Throw) switch provides reliable circuit closure to the control board once the inducer motor establishes the required negative pressure. This part is a direct factory replacement for Lennox model 33J8801, ensuring a drop in fit with existing mounting
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