Help protect your A/C compressor with this Four Seasons switch, part number 20946. It is a system-mounted binary pressure switch that monitors refrigerant pressure and is designed to interrupt the compressor circuit when system pressure is too low or too high. It fits many vehicles, among them the 2001 Subaru Forester, 1994-2002 Honda Passport and 1993-2000 Isuzu Trooper, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list.
Four Seasons engineers and tests its products with the aim of years of trouble-free operation, and it draws on more than 50 years of mobile A/C experience. Signs a binary pressure switch may need replacing include an A/C compressor that won't engage, a compressor that cycles erratically, or warm air from the vents. Low refrigerant and wiring or relay faults can cause the same symptoms, so diagnose the system before replacing the switch. Follow the vehicle service procedure for handling refrigerant during replacement.
What does the Four Seasons 20946 binary switch do?
It is a system-mounted binary pressure switch that monitors A/C refrigerant pressure. It is designed to cut the compressor circuit when pressure is too low or too high.
Is this a brake light switch for my 2001 Subaru Forester?
No. Part 20946 is an A/C binary pressure switch, not a brake light switch. It is a direct-fit replacement for the A/C system on the 2001 Subaru Forester, among other listed applications.
Which other vehicles does this switch fit?
It fits many vehicles, including the 1994-2002 Honda Passport and the 1993-2000 Isuzu Trooper. See the Buyer's Guide tab for the full list.
What comes with the switch?
It comes with the gaskets, O-rings or seals needed to properly replace it. The switch is zinc coated to resist corrosion and color coded for easy identification.
What are signs the binary switch may need replacing?
Signs include a compressor that won't engage or cycles erratically, and warm air from the vents. Low refrigerant or electrical faults can cause similar symptoms, so diagnose the system first.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
