{"product_id":"four-seasons-20948-a-c-trinary-switch","title":"Four Seasons 20948 A\/C Trinary Switch","description":"\u003ch2\u003eFour Seasons 20948 Trinary Pressure Switch\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Pressure Switch line delivers system-mounted HVAC control for A\/C clutch and compressor circuits. Part number 20948 is a 12-volt, 4-terminal trinary pressure switch with a gray oval male connector and 3\/8\" x 24 male fitting thread size for select Toyota, Lexus, and Acura applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSystem-mounted trinary pressure switch for A\/C pressure monitoring\u003c\/li\u003e\n\u003cli\u003e12-volt electrical design with 4 pin terminals\u003c\/li\u003e\n\u003cli\u003eOval gray male connector with Weather Pack sealing\u003c\/li\u003e\n\u003cli\u003eSteel construction with male fitting and 3\/8\" x 24 thread size\u003c\/li\u003e\n\u003cli\u003eOpen compressor circuit and closed fan circuit configuration\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM requirements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eFour Seasons 20948 is a system mounted trinary pressure switch used in HVAC A\/C clutch and compressor control circuits. The trinary design monitors refrigerant pressure and helps manage compressor operation while also supporting fan control logic. This pressure switch is built with a steel body, pin terminals, and a male oval connector for direct replacement service on select vehicles. It cross-references UAC SW10003C for the same application.\u003c\/p\u003e\u003cp\u003eCompatible With 1995-1999 Toyota Avalon, N\/A; 1994 Lexus SC300, N\/A; 1994 Lexus SC400, N\/A; 1992-1993 Lexus ES300, N\/A; 1992-1993 Lexus SC300, N\/A; 1992-1993 Lexus SC400, N\/A; 1992-1993 Toyota Camry, N\/A; 1992-1993 Toyota Celica, N\/A; 1988-1992 Acura Legend, N\/A; 1992 Lexus LS400, N\/A; 1991 Lexus LS400, N\/A; 1991 Toyota Celica, N\/A.\u003c\/p\u003e\u003cp\u003eFor Toyota Camry, Toyota Celica, Lexus SC300, and Lexus SC400 service, this part number 20948 supports pressure-switch replacement where the original system-mounted trinary switch is specified.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Part May Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA\/C compressor not engaging due to pressure switch failure\u003c\/li\u003e\n\u003cli\u003eIntermittent compressor cycling from worn internal contacts\u003c\/li\u003e\n\u003cli\u003eCooling fan control problems tied to pressure signal loss\u003c\/li\u003e\n\u003cli\u003eHVAC pressure circuit faults caused by damaged connector terminals\u003c\/li\u003e\n\u003cli\u003eRefrigerant system shutdown from an inoperative trinary switch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify connector shape, terminal count, and fitting thread size before installation. Confirm the vehicle uses a system-mounted trinary pressure switch and match the original electrical and refrigerant-side configuration. Inspect the connector, terminals, and sealing surfaces for corrosion or damage before reconnecting the HVAC harness. After installation, check A\/C operation and fan response under normal system pressure.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eFour Seasons 20948 is listed as meeting or exceeding OEM requirements for the specified applications. The Four Seasons Pressure Switch line is built for direct-fit HVAC service where accurate pressure signaling is required for compressor and fan control.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":44592397418677,"sku":"BBRN-20948","price":57.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_20948_Fro_8ad02ff3-3a9b-4b8c-99d5-077050d0b3ab.jpg?v=1775067604","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-20948-a-c-trinary-switch","provider":"PartCatalog","version":"1.0","type":"link"}