Four Seasons A/C Trinary Switch 20944
Four Seasons A/C Trinary Switch 20944 - view 2
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Four Seasons A/C Trinary Switch 20944
Four Seasons A/C Trinary Switch 20944 - view 2
Four Seasons A/C Trinary Switch 20944 - view 3
Four Seasons A/C Trinary Switch 20944 - view 4

A/C Trinary Switch for 2002-2008 Toyota Corolla & More - Four Seasons 20944

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$26.99
MPN: 20944
Item Package Quantity: 1
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Four Seasons A/C Trinary Switch P/N:20944
Four Seasons A/C Trinary Switch P/N:20944
$26.99

Help your A/C system keep watch over refrigerant pressure with the Four Seasons A/C Trinary Switch, part number 20944, a system-mounted trinary pressure switch built for vehicle-specific applications. It fits many vehicles, among them the 2002-2008 Toyota Corolla, 2003-2007 Honda Accord and 2002-2006 Toyota Camry, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list and engine details.

A trinary switch combines three pressure-sensing jobs in one unit. It helps shut off the compressor when refrigerant pressure falls too low or climbs too high, and it provides a mid-pressure signal commonly used to switch the condenser cooling fan.

  • Corrosion protection: zinc coated to resist corrosion.
  • Vehicle-specific: designed for the listed applications.
  • Sealing components: contains the gaskets, O-rings or seals needed to replace the switch properly.
  • Color coded: for easy identification.

Four Seasons draws on more than 50 years of mobile A/C experience. Signs a trinary switch may need replacing include a compressor that won't engage or cycles erratically, warm air from the vents, or a condenser fan that doesn't come on. Other faults can cause the same symptoms, so diagnose the system before replacing parts. If a failed trinary switch is the cause, the 20944 replaces it.

Frequently Asked Questions

What does the Four Seasons 20944 trinary switch do?

It monitors A/C refrigerant pressure. It helps cut off the compressor when pressure is too low or too high, and it provides a mid-pressure signal commonly used to control the condenser fan.

Does this A/C switch fit a 2002-2008 Toyota Corolla?

Yes. It is a direct-fit replacement for the 2002-2008 Toyota Corolla, 2003-2007 Honda Accord and 2002-2006 Toyota Camry. Check the Buyer's Guide tab for your exact vehicle.

What is included with the switch?

The switch comes with the gaskets, O-rings or seals needed to replace it properly.

What are signs a trinary switch may need replacing?

Look for a compressor that won't engage or cycles erratically, warm air from the vents, or a condenser fan that doesn't turn on. Other faults can cause these symptoms, so diagnose the A/C system first.

Is the switch protected against corrosion?

Yes. It is zinc coated to resist corrosion. It is also color coded for easy identification.

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