Four Seasons A/C Trinary Switch 20948
Four Seasons A/C Trinary Switch 20948 - view 2
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Four Seasons A/C Trinary Switch 20948 - view 4
Four Seasons A/C Trinary Switch 20948
Four Seasons A/C Trinary Switch 20948 - view 2
Four Seasons A/C Trinary Switch 20948 - view 3
Four Seasons A/C Trinary Switch 20948 - view 4

A/C Trinary Switch for 1995-1999 Toyota Avalon & More - Four Seasons 20948

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$65.99
MPN: 20948
Item Package Quantity: 1
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Four Seasons A/C Trinary Switch P/N:20948
Four Seasons A/C Trinary Switch P/N:20948
$65.99

Help protect your A/C compressor with the Four Seasons System Mounted Trinary Pressure Switch, part number 20948, which monitors refrigerant pressure in the air conditioning system. It fits many vehicles, among them the 1992-1993 Toyota Camry, 1995-1999 Toyota Avalon and 1991-1993 Toyota Celica, and is a direct-fit replacement for the listed applications.

A trinary switch does three jobs in one unit. It opens the compressor circuit when refrigerant pressure drops too low or climbs too high, and it provides a third signal used to control the cooling fan. If a failed switch is why your compressor won't engage or your fan won't run with the A/C on, this part replaces it.

  • Engineered and tested: Four Seasons engineers and tests its products and backs them with more than 50 years of mobile A/C experience.
  • Corrosion protection: The switch is zinc coated to resist corrosion.
  • Sealing included: It contains gaskets, O-rings or seals to properly replace the product.
  • Easy to identify: It is color coded for easy identification and built for vehicle-specific applications.

See the Buyer's Guide tab for the full vehicle list and engine details. Follow the vehicle service information when you replace the switch, because refrigerant handling may be required.

Frequently Asked Questions

What does an A/C trinary switch do?

It monitors refrigerant pressure and combines three functions: low-pressure and high-pressure protection for the compressor, plus a signal used to control the cooling fan.

Is this a brake light switch for the 1992-1993 Toyota Camry?

No. Four Seasons 20948 is a system-mounted A/C trinary pressure switch, not a brake light switch. It is a direct-fit replacement for the 1992-1993 Toyota Camry.

Which other vehicles does the 20948 fit?

It fits many vehicles, including the 1995-1999 Toyota Avalon and 1991-1993 Toyota Celica. See the Buyer's Guide tab for the full list and engine details.

What comes with the switch?

It contains gaskets, O-rings or seals to properly replace the product. The switch is zinc coated to resist corrosion and color coded for easy identification.

What are signs a trinary switch may need replacing?

Signs include a compressor that won't engage or cycles erratically, or a cooling fan that doesn't run with the A/C on. Low refrigerant or wiring faults can cause the same signs, so diagnose first.

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