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MEI Trinary Switch 1550

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MEI Trinary Pressure Switch with 1/4 in. Male Fitting and 4 Terminal 12/24V - Normally Open - 1550

Product Condition: NEW
MEI Trinary Switch 1550
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The MEI Trinary Pressure Switch 1550 is found on systems that are equipped with radiatior shutters and/or electric or air fan clutches. This switch perform three functions, it prevents compressor operation if system has refrigerant loss, or ambient temperature drops too low. It prevents compressor operation if high side pressure rises too high, it then automatically resets when pressure drops to normal. And lastly it overrides shutter/fan control to keep head pressure within normal range.


  • MEI Part No.: 1550
  • AirSource: 1550
  • Alliance: 318009, 318039
  • Kysor: 2299004, 404171
  • MACK: 1MR2380, 1MR3439
  • FOUR SEASONS: 35899 
  • MACK: 4379-RD5-3595-0, 4379-RD5-4585-0
  • Murray: 207076
  • Navistar: 1691699C91, 1691699-C91
  • Truck Air: 11-2625
  • WESTERN STAR: 02-2750417
  • OEM Number: RD5-4585-0
  • Manufacturer: Red Dot
  • Application: Red Dot - Multi Applications
  • 4 Terminal
  • Refrigerant: R12/R134a
  • Volts: 12/24V
  • Open: 22-325
  • Close: 40-230
  • Normally Open
  • Thread: 1/4 in. Male

Additional Information

Product Condition NEW
upc No

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