Four Seasons HVAC Pressure Switch 37327
Four Seasons HVAC Pressure Switch 37327 - view 2
Four Seasons HVAC Pressure Switch 37327 - view 3
Four Seasons HVAC Pressure Switch 37327
Four Seasons HVAC Pressure Switch 37327 - view 2
Four Seasons HVAC Pressure Switch 37327 - view 3

Four Seasons HVAC Pressure Switch P/N:37327

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$77.99
MPN: 37327
Item Package Quantity: 1
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Four Seasons HVAC Pressure Switch P/N:37327
Four Seasons HVAC Pressure Switch P/N:37327
$77.99

Keep your cab's air conditioning switching on cue with the Four Seasons HVAC Pressure Switch (P/N 37327), a system-mounted binary pressure switch built for heavy-duty A/C service. It installs as a direct-fit replacement across a wide range of 2006-2008 Kenworth and Peterbilt trucks, including the Kenworth C500, T300, T800 and W900 and the Peterbilt 320, 335, 386 and 387 — see the Buyer's Guide tab for the full list of applications.

A binary pressure switch monitors refrigerant pressure and opens or closes the compressor-clutch circuit at set high- and low-pressure thresholds, helping protect the compressor when system pressure falls outside its normal range. If a faulty original switch is the reason your A/C compressor won't engage or cycles improperly, this part replaces it.

  • Zinc coated to resist corrosion.
  • Vehicle-specific application designed for the listed trucks.
  • Includes gaskets, o-rings, or seals as needed to properly replace the original.
  • Color coded for easy identification.

Backed by Four Seasons' long history in mobile A/C, this switch is engineered and tested for reliable operation. Diagnose the cause of an A/C problem before replacing, as pressure-related faults can have other sources.

Frequently Asked Questions

What does this binary pressure switch do?

It monitors A/C refrigerant pressure and opens or closes the compressor-clutch circuit at set high- and low-pressure thresholds to help protect the compressor.

Will this fit my truck?

It's a direct-fit replacement for many 2006-2008 Kenworth and Peterbilt models. Check the Buyer's Guide tab to confirm your exact year, make and model.

Does it come with seals?

Yes. It contains the gaskets, o-rings, or seals needed to properly replace the original switch.

Is the switch protected against corrosion?

Yes, it is zinc coated to resist corrosion.

My A/C compressor won't engage — will this fix it?

If a failed original pressure switch is the cause, this replaces it. Diagnose the system first, since a compressor that won't engage can have other causes.

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