Four Seasons HVAC Pressure Switch 37350
Four Seasons HVAC Pressure Switch 37350 - view 2
Four Seasons HVAC Pressure Switch 37350 - view 3
Four Seasons HVAC Pressure Switch 37350
Four Seasons HVAC Pressure Switch 37350 - view 2
Four Seasons HVAC Pressure Switch 37350 - view 3

Four Seasons HVAC Pressure Switch P/N:37350

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$85.99
MPN: 37350
Item Package Quantity: 1
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Four Seasons HVAC Pressure Switch P/N:37350
Four Seasons HVAC Pressure Switch P/N:37350
$85.99

Protect the A/C compressor on your Mack truck with the Four Seasons HVAC Pressure Switch 37350, a system-mounted binary pressure switch that monitors refrigerant pressure and signals the compressor clutch circuit. It installs as a direct-fit replacement across a broad range of 1989–2010 Mack trucks — including the CH, CL, CV, CX, DM, MR, R and RD series plus the CS/MS MID-LINER models — see the Buyer's Guide tab for the full list of 44 applications.

  • Binary pressure switch: low-pressure operation closes at 40 psi (on) and opens at 28 psi (off), helping keep the compressor clutch cycling within range.
  • Zinc-coated steel body: zinc coated to resist corrosion.
  • Includes seals: comes with the gaskets, o-rings, or seals needed to properly complete the replacement.
  • Color-coded (gray): color coded for easy identification.
  • Connector & fitting: 2-terminal oval female connector with a 10mm x 1.25 female fitting.

Built to meet or exceed OEM specifications for vehicle-specific applications. Ships one switch per package; applications listed use a quantity of one.

Manufacturer part number 37350.

This part cross-references / interchanges with the following part numbers:

937350, 37350, 760502, 8508902, 1711638, 1MR3550M, 1MR3550M2, 4379RD589460, 1511, A03750, 2930174, MT1910, 71R6125, RD589460, RD595770, 111212, SW11190

Frequently Asked Questions

What does this pressure switch do?

It monitors A/C refrigerant system pressure and signals the compressor clutch circuit. As a binary switch, its low-pressure contacts close at 40 psi (on) and open at 28 psi (off).

Will this switch fit my vehicle?

It's a direct-fit replacement for a wide range of 1989–2010 Mack trucks, including CH, CL, CV, CX, DM, MR, R and RD series. Check the Buyer's Guide tab for the full list of 44 applications.

What's included with the switch?

The switch ships with the gaskets, o-rings, or seals needed to properly complete the replacement. One switch is supplied per package.

What are signs this switch may need replacing?

Signs may include the A/C not cooling and the compressor clutch not engaging or short-cycling. These symptoms can have other causes, so diagnose the system before replacing.

Is this an OE-quality part?

Yes — it's built to meet or exceed OEM specifications for vehicle-specific applications, with a zinc-coated steel body to resist corrosion.

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