Four Seasons HVAC Binary Switch P/N:36571
Help protect your A/C compressor from running at unsafe refrigerant pressures with this Four Seasons switch, the 20979 system-mounted binary pressure switch. It fits many vehicles, among them the 1990-1994 Nissan Sentra, 1993-1995 Nissan Pathfinder and 1989-1994 Nissan 240SX. It is a direct-fit replacement for the listed applications; see the Buyer's Guide tab for the full list.
A binary switch monitors pressure in the air conditioning system. It is designed to interrupt compressor operation when that pressure falls too low or climbs too high. Four Seasons engineers and tests its products for dependable service and backs them with more than 50 years of mobile A/C experience.
Signs this part may need replacing: the compressor clutch will not engage even though the refrigerant charge is correct, the compressor cycles erratically, or refrigerant leaks at the switch. Diagnose the A/C system before replacing parts. If a failed binary switch is the cause, this switch replaces it.
Interchange: 1551049 · 207796 · 11120979 · 9213640F00 · 9213701J00 · 9213740F00 · 921390S210 · 9213959G00 · 19188198 · 1711475 · A07796 · MT0361 · SW10031 · SW11219C
This part cross-references / interchanges with the following part numbers:
What does a binary pressure switch do?
It monitors refrigerant pressure in the A/C system. It is designed to cut compressor operation if the pressure is too low or too high, which helps protect the compressor.
Will this Pathfinder switch fit my 1993-1995 Nissan Pathfinder?
Yes, the Four Seasons 20979 is listed as a direct-fit replacement for the 1993-1995 Nissan Pathfinder. It also fits the 1990-1994 Nissan Sentra and the 1989-1994 Nissan 240SX. See the Buyer's Guide tab for other vehicles.
What comes in the box?
The switch comes with gaskets, O-rings or seals so it can be properly replaced.
What are signs the binary switch may need replacing?
Signs include a compressor that will not engage with a correct charge, erratic compressor cycling, or a leak at the switch. Diagnose the system first to confirm that the switch is the cause.
How is the switch installed?
Follow the vehicle service information. On some applications, replacing an A/C pressure switch may require recovering the refrigerant with certified equipment, then evacuating and recharging the system.
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.