{"product_id":"dorman-904-611-hvac-pressure-switch","title":"Dorman 904-611 HVAC Pressure Switch","description":"\u003ch2\u003eOverview of Dorman 904-611 HVAC Pressure Switch\u003c\/h2\u003e\u003cp\u003eThe Dorman 904-611 HVAC Pressure Switch is designed for precise pressure monitoring in automotive air conditioning systems. Engineered specifically for select BMW, Mini, and Rolls-Royce models, this switch ensures reliable operation within the vehicle's HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOperates at 5 volts with a 1 amp amperage rating\u003c\/li\u003e\n\u003cli\u003eCompatible with R134a refrigerant systems\u003c\/li\u003e\n\u003cli\u003ePressure limits: closes at 260 psi and opens at 475 psi\u003c\/li\u003e\n\u003cli\u003eMaximum pressure reading up to 522 psi\u003c\/li\u003e\n\u003cli\u003eDurable metal housing with a black rectangular female connector\u003c\/li\u003e\n\u003cli\u003eThree male pin terminals for secure electrical connection\u003c\/li\u003e\n\u003cli\u003eSpecific fitment for various BMW, Mini, and Rolls-Royce models\u003c\/li\u003e\n\u003cli\u003eBolt mount type for stable installation\u003c\/li\u003e\n\u003cli\u003eThread diameters available: 3\/8 in, 1\/2 in, 5\/8 in, 3\/4 in, and 1 in\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 904-611 HVAC Pressure Switch is a critical component in the air conditioning system, designed to monitor refrigerant pressure and protect the system from damage due to abnormal pressure levels. This switch operates on a 5-volt electrical system and is rated for 1 amp, making it compatible with the electrical requirements of many BMW, Mini, and Rolls-Royce vehicles. It is specifically engineered for use with R134a refrigerant, which is standard in modern automotive A\/C systems.\u003c\/p\u003e\u003cp\u003eThe switch activates at a pressure limit of 260 psi (closed) and deactivates at 475 psi (open), with a maximum pressure tolerance of 522 psi. Its metal housing provides durability and resistance to harsh under-hood conditions. The connector is black, rectangular, and female, designed to mate with male pin terminals, ensuring a secure and reliable electrical connection. The bolt mount type allows for straightforward installation in the designated mounting location.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis HVAC pressure switch is compatible with a wide range of BMW models including the 128i, 135i, 228i, 320i, 328i, 330i, 335i, 535i, 740i, M3, M5, X3, X5, and Z4, among others. It also fits Mini models such as Cooper, Cooper Clubman, and Cooper Countryman, as well as Rolls-Royce models like Phantom, Ghost, and Wraith. The Dorman 904-611 is designed for specific fitment, ensuring proper function and integration within these vehicles' HVAC systems.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the HVAC Pressure Switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents compressor damage caused by excessively high or low refrigerant pressure\u003c\/li\u003e\n\u003cli\u003eHelps maintain optimal air conditioning system performance\u003c\/li\u003e\n\u003cli\u003eProtects against system shutdowns due to pressure irregularities\u003c\/li\u003e\n\u003cli\u003eEnsures accurate pressure monitoring for efficient climate control\u003c\/li\u003e\n\u003cli\u003eReduces risk of refrigerant leaks by maintaining system integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify vehicle compatibility using the part number 904-611 before installation\u003c\/li\u003e\n\u003cli\u003eEnsure the system is depressurized and the ignition is off prior to replacement\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to remove the old pressure switch and install the new one securely with the bolt mount\u003c\/li\u003e\n\u003cli\u003eCheck the connector for proper engagement and secure fit with the male pin terminals\u003c\/li\u003e\n\u003cli\u003eAfter installation, test the A\/C system to confirm correct operation of the pressure switch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman parts are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. The 904-611 HVAC Pressure Switch undergoes rigorous quality control to ensure consistent operation under demanding conditions. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44327410303157,"sku":"BKKY-904-611","price":78.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_904611_Fro_26db2d59-b3b5-4bd1-bd67-4efdeb053a27.jpg?v=1775011828","url":"https:\/\/www.partcatalog.com\/products\/dorman-904-611-hvac-pressure-switch","provider":"PartCatalog","version":"1.0","type":"link"}