{"product_id":"dorman-904-621-hvac-pressure-switch","title":"Dorman 904-621 HVAC Pressure Switch","description":"\u003ch2\u003eDorman 904-621 A\/C Pressure Sensor\u003c\/h2\u003e\u003cp\u003eDorman 904-621 is a direct replacement HVAC pressure switch for restoring air conditioning performance when the original sensor has corroded terminals or a damaged connector. Built for specific-fit applications using R134A refrigerant, this A\/C transducer switch helps return proper pressure signal control to the system.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement HVAC pressure switch for A\/C pressure monitoring\u003c\/li\u003e\n\u003cli\u003eSpecific fit for confirmed vehicle applications\u003c\/li\u003e\n\u003cli\u003e5-volt sensor with 3-pin male terminals and female connector\u003c\/li\u003e\n\u003cli\u003eBlack oval connector with metal housing\u003c\/li\u003e\n\u003cli\u003eR134A refrigerant type\u003c\/li\u003e\n\u003cli\u003eBolt-on mount type for a secure installation\u003c\/li\u003e\n\u003cli\u003ePressure limits: closed at 260 and open at 475\u003c\/li\u003e\n\u003cli\u003eMaximum pressure reading: 455 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman 904-621 A\/C pressure sensor is a replacement transducer switch for vehicles that rely on accurate refrigerant pressure input to manage air conditioning operation. It is a specific-fit part with a 3\/8 in; 1\/2 in; 5\/8 in; 3\/4 in; 1 in thread diameter range, a black oval connector, and a 3-terminal pin layout. The metal housing and bolt-on design support a secure connection at the A\/C system interface. This part cross-references Baldwin 20054 for the same application.\u003c\/p\u003e\u003cp\u003eCompatible With 2009-2011 Ford Ranger, N\/A; 2004-2005 Ford Explorer, N\/A; 1999 Ford Escort, N\/A; and 1992 Ford Probe, N\/A. If you are searching for a Ford Ranger A\/C pressure switch replacement, Ford Explorer HVAC pressure sensor, or a Ford Escort air conditioning transducer switch, Dorman 904-621 is the direct replacement part to check.\u003c\/p\u003e\u003ch2\u003eCommon Problems It Can Help Solve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAir conditioning stops cycling or fails to engage\u003c\/li\u003e\n\u003cli\u003eFault codes related to A\/C pressure signal loss\u003c\/li\u003e\n\u003cli\u003eCorroded terminals at the original pressure switch\u003c\/li\u003e\n\u003cli\u003eBroken connector on the factory sensor\u003c\/li\u003e\n\u003cli\u003eIncorrect refrigerant pressure readings affecting HVAC operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the connector shape, terminal count, thread diameter, and refrigerant type before installation. This sensor uses a female connector with male terminals and mounts by bolt-on attachment. Confirm the vehicle uses an R134A system and match the original pressure switch configuration before replacing the part. For fitment-based searches, this part is commonly referenced for 2009-2011 Ford Ranger, 2004-2005 Ford Explorer, 1999 Ford Escort, and 1992 Ford Probe applications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman replacement components are built to match the original part’s function and restore system operation when the factory sensor has failed or the connector has been damaged. Dorman 904-621 is engineered as a direct replacement for the listed Ford applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52401888821429,"sku":"BKKY-904-621","price":45.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_904621_Fro.jpg?v=1777760859","url":"https:\/\/www.partcatalog.com\/products\/dorman-904-621-hvac-pressure-switch","provider":"PartCatalog","version":"1.0","type":"link"}