Four Seasons A/C Trinary Switch 20928
Four Seasons A/C Trinary Switch 20928 - view 2
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Four Seasons A/C Trinary Switch 20928 - view 4
Four Seasons A/C Trinary Switch 20928
Four Seasons A/C Trinary Switch 20928 - view 2
Four Seasons A/C Trinary Switch 20928 - view 3
Four Seasons A/C Trinary Switch 20928 - view 4

A/C Trinary Switch for 1998-2003 Toyota Sienna & More - Four Seasons 20928

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$75.99
MPN: 20928
Item Package Quantity: 1
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Four Seasons A/C Trinary Switch P/N:20928
Four Seasons A/C Trinary Switch P/N:20928
$75.99

Help keep your air conditioning working properly with the Four Seasons A/C Trinary Switch, part number 20928, a system-mounted trinary pressure switch that monitors refrigerant pressure so the A/C system can respond to it. It fits many vehicles, among them the 1994-2001 Toyota Camry, 1996-2000 Toyota RAV4 and 1991-1997 Toyota Corolla. See the Buyer's Guide tab for the full list and engine details.

A trinary switch combines three pressure functions in one unit. It is designed to interrupt compressor operation when refrigerant pressure is abnormally low or high, and it provides a mid-range pressure signal used for cooling fan control. If a failed trinary switch is the cause of your A/C trouble, the 20928 replaces it.

  • Corrosion protection: zinc coated to resist corrosion.
  • Vehicle-specific: built for vehicle-specific applications.
  • Sealing included: comes with the gaskets, O-rings or seals Four Seasons supplies to properly replace the part.
  • Easy identification: color coded so it is simple to pick out.

Four Seasons engineers and tests its products and draws on more than 50 years of mobile A/C experience. Signs this switch may need replacing include warm air from the vents, a compressor that will not engage or cycles erratically, and a cooling fan that does not respond when the A/C is on. Other A/C faults can cause the same symptoms, so diagnose the system before you replace parts.

Frequently Asked Questions

What does an A/C trinary pressure switch do?

It monitors refrigerant pressure. It is designed to cut compressor operation at abnormally low or high pressure and to send a mid-range pressure signal used for cooling fan control.

Will the Four Seasons 20928 fit my 1994-2001 Toyota Camry?

Yes, the 1994-2001 Toyota Camry is a listed application, as are the 1996-2000 Toyota RAV4 and 1991-1997 Toyota Corolla. Check the Buyer's Guide tab to confirm your vehicle.

What comes with the switch?

The 20928 trinary switch comes with the gaskets, O-rings or seals Four Seasons supplies to properly replace the part. It is zinc coated to resist corrosion and color coded for easy identification.

What are the signs a trinary switch may need replacing?

Warm air from the vents, a compressor that won't engage or cycles erratically, or a cooling fan that doesn't respond with the A/C on. Other faults can cause these symptoms too, so diagnose the system first.

How should the switch be installed?

The switch mounts on the refrigerant system, so follow the vehicle's service procedure for accessing it. Fit the supplied seals to help prevent refrigerant leaks.

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