MEI 1439 Binary High Pressure A/C Switch with Metric Fitting

The MEI 1439 is a binary high-pressure switch designed for heavy-duty truck air conditioning systems. This normally closed (NC) high-pressure switch features an M10 female metric thread and a purple 2-pin connector, making it ideal for Peterbilt truck A/C applications.

Key Features:

• Female M10-1.25 metric thread size for secure installation
• Opens at 330-370 PSI, closes at 180-240 PSI
• Compatible with R134a refrigerant systems
• Purple 2-pin electrical connector
• Prevents compressor operation during refrigerant loss, low ambient temperature, or excessive high-side pressure; automatically resets when pressure normalizes

This binary pressure switch serves dual protective functions in your truck's A/C system by monitoring high-side pressure and preventing compressor damage. Replaces OEM Peterbilt part number 18-038535 and cross-references to Truck Air 11-2656. Manufactured by MEI Corporation, a leading supplier of heavy-duty HVAC components for Class 6, 7, and 8 commercial trucks.

OEM Cross-Reference Numbers: Peterbilt 18-038535, Truck Air 11-2656, 850-8402, ABP N83 318170, 651323, P93CAA3605-01, PTAC1439, 71R6180, RD-5-8220-0P