Red Dot 71R6040 Low Side Pressure Switch (Normally Open) – 35 PSI Close / 15 PSI Open

The Red Dot 71R6040 low side pressure switch is designed to monitor low-side refrigerant pressure in mobile HVAC systems. It is a normally open switch that closes at 35 PSI and opens at 15 PSI, helping protect the system by preventing operation outside safe pressure limits.

This switch features a 1/4-inch female flare fitting and two-conductor bullet-style connectors (male bullet and female receptacle) for straightforward installation across a wide range of heavy-duty and off-highway HVAC applications. Its defined pressure range and common connector style make it a reliable service replacement in mobile air conditioning systems.

Use the specifications and interchange numbers below to confirm compatibility before ordering.

Product Specifications

• Part Type: Low Side Pressure Switch

• Red Dot Part No.: 71R6040

• Red Dot Factory Part No.: RD-5-6395-0P

• Switch Type: Low side

• Operating Style: Normally open

• Closes At: 35 PSI

• Opens At: 15 PSI

• Function: Closes at higher pressure, opens at lower pressure

• Fitting: 1/4″ female flare

• Electrical Connection: 2-conductor bullet connectors (male bullet / female receptacle)

Cross Reference Numbers

• Texas Truck AC: 850-8008

• AirSource (MEI): 1426

• Alliance: ABP N83 318024, ABP N83 318074, ABP N83 318084

• Bergstrom: 650629

• Climatech: BB1005

• CoolCab: 901508

• CoolStar (MEI): 910-1024

• Euclid Industries: E-807351

• Four Seasons: 35833

• Kysor: 2299010

• Kysor (Old): 404339

• Navistar International: 711003

• NDNS: ABPN83318024, ABPN83318074, ABPN83318084

• PACCAR: 18-03285, 20PS39-10, 20PS39-40

• Primatech: PTAC1426

• RoadForce: RF8586506636

• TRP / Climatech: BB10050

• Truck Air (MEI): 11-1405

• TruckAC+: T6123

• Volvo: 176226

• Red Dot (Aftermarket): 71R6040

• Red Dot (Factory): RD-5-6395-0P

Interchange Numbers

11-1405, 1426, 176226, 18-03285, 2299010, 232-8459, 404339, 4379-RD563950, 4379-RD563950P, 650629, 71R6040, 850-8008, 910-1024, ABP N83 318024, ABP N83 318074, ABP N83 318084, BB10050, E-807351, RDHRD563950P, RDT71R6040, SWI1624, ZGG711003