The Red Dot 71R6150 dual function pressure switch provides both low-pressure and high-pressure protection in mobile HVAC systems, helping maintain consistent operation while protecting the compressor from unsafe conditions. By monitoring pressure on both sides of the system, this switch prevents operation during refrigerant loss, low ambient conditions, or excessive high-side pressure.
This switch is specified for select Red Dot unit models, including R-9780 and R-9777 series applications, and uses three 1/4-inch male spade terminals, allowing straightforward integration with common mobile HVAC wiring harnesses.
Use the pressure set points and interchange numbers below to confirm the correct match before ordering.
Product Specifications
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Part Type: Dual Function Pressure Switch (Low / High)
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Red Dot Part No.: 71R6150
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Red Dot Factory Part No.: RD-5-9577-0P
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Switch Function: Low- and high-pressure protection
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Electrical Connection: Three 1/4″ male spade terminals
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Applications (as provided):
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R-9780-0
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R-9777-0
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R-9777-1
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R-9777-0-24
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R-9777-1-24
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Low Pressure Operation
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Opens: 20–33 PSI
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Closes: 23–37 PSI
High Pressure Operation
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Opens: 315–355 PSI
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Closes: 215–275 PSI
Cross Reference Numbers
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Alliance: ABP N83 318178
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Caterpillar: 247-3632
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Four Seasons: 35759
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Freightliner: RDH RD5 9577 0
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John Deere: AT197508
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Kysor: 2199060
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Truck Air: 11-0200
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Volvo: RDHRD595770P
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Texas Truck AC: 975-T9472
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TruckAC+: T9472
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Red Dot (Aftermarket): 71R6150
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Red Dot (Factory): RD-5-9577-0P
Interchange Numbers
1-2420, 11-0200, 1405, 1660725, 200886, 2199060, 247-3632, 35759, 404181, 4379-RD595770P, 586127M1, 71R6150, 925731, ABP N83 318178, AM80821, AR77344, AT197508, E-807995, RDH RD5 9577 0, RDHRD595770P, RDT71R6150, ZGG12420
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