Red Dot 71R6020 Low Side Pressure Switch (30 PSI Open / 7 PSI Close)

The Red Dot 71R6020 low side pressure switch is designed to protect mobile HVAC systems by monitoring low-side refrigerant pressure. It is a normally closed switch that closes at low pressure (7 PSI) and opens at higher pressure (30 PSI), helping prevent compressor operation outside safe pressure limits.

This switch features a 1/4″ female flare fitting and a 2-conductor wire lead with male/female Packard connectors, allowing for straightforward installation across a wide range of heavy-duty and off-highway HVAC applications. Its reliable pressure response makes it a common 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.: 71R6020

• Red Dot Factory Part No.: RD-5-6397-0P

• Switch Type: Low side

• Operating Style: Normally closed

• Opens At: 30 PSI

• Closes At: 7 PSI

• Function: Opens at high pressure, closes at low pressure

• Fitting: 1/4″ female flare

• Electrical Connection: 2-conductor wire to male/female Packard plugs

Cross Reference Numbers

• Texas Truck AC: 850-8260

• AirSource (MEI): 1476

• Alliance: ABP N83 318094, ABP N83 318104, ABP N83 318154

• Bergstrom: 650719

• Climatech: BB1120, BB1180

• CoolCab: 901509

• CoolStar (MEI): 915-1008

• Euclid Industries: E-807350

• Four Seasons: 35838

• Freightliner: 20PS85-8

• Kysor: 2213001

• Kysor (Old): 404123

• Motivair: 1-1132, 33604, 44571

• Navistar International: 442183-C1, 587977-C1

• NDNS: 20PS858, 442183C1, 587977C1, ABPN83318094, ABPN83318104, ABPN83318154

• Primatech: PTAC1476

• RoadForce: RF2506502830, RF360B404162, RF4386509685

• TRP / Climatech: BB11200, BB11800

• Truck Air (MEI): 44883

• TruckAC+: T7207

• TTA/C: 14-5500

• Volvo: 176229

• Red Dot (Aftermarket): 71R6020

• Red Dot (Factory): RD-5-6397-0

Interchange Numbers

1-1132, 1-4592, 1-4610, 11-2018, 1476, 176229, 207631, 2213001, 2213006, 232-8457, 35838, 402219, 404123, 4379-RD563970, 4379-RD563970P, 547650C1, 5879771C1, 650203, 650719, 71R6020, 850-8006, ABP N83 318094, ABP N83 318154, BB11500, BB11800, E-807350, RDHRD563970P, RDT71R6020, SWI2008