Lennox 11U70 Pressure Switch 322838-752 The extended capillary length provides

The extended capillary length provides greater mounting flexibility for the sensing bulb

The contacts use yellow (common)

Is this part compatible with high-altitude models

the S1-5992116 provides the reliable set-points necessary to prevent nuisance tripping and ensure consistent furnace sequence of operation

or use a multimeter to verify if the MFD reading is within +/- 5-10% of the 70 microfarad rating

Lennox 11U70 Pressure Switch 322838-752 The extended capillary length providesThe Lennox 11U70 Pressure Switch is a critical safety component engineered to monitor and regulate internal air pressure within high performance HVAC systems. This . 80 pressure switch (Catalog No. 11U70, Part No. 104371 07) is a single pole, single throw (SPST N. O.) contact rated for 5 Amp resistive at 24 VAC. Tasked with sensing the draft created by the inducer motor, it ensures the combustion process only initiates under safe airflow conditions.