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drawing the standard 24VAC control voltage from the integrated furnace board
ensuring optimal superheat levels and protecting the compressor from liquid slugging
this thermal expansion valve is internally compensated and calibrated specifically for the pressure-temperature relationship of R410A
and Payne residential heating systems
Can I replace a manual reset limit with an auto-reset model
Lennox 33J88 Pressure Switch 30067439-890 drawing the standard 24VAC controlThe 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