{"product_id":"four-seasons-37821-hvac-pressure-switch","title":"Four Seasons 37821 HVAC Pressure Switch","description":"\u003ch2\u003eFour Seasons 37821 HVAC Pressure Switch\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Pressure Switch 37821 is a system-mounted HVAC pressure switch built for high cut-out control in automotive air conditioning systems. It uses a wire lead connector, a 2-terminal design, and an M10 x 1.25 fitting thread size for direct service replacement on the correct application.\u003c\/p\u003e\u003cp\u003eFour Seasons Pressure Switch products are used in HVAC service work where accurate pressure signaling is needed to protect the A\/C system and maintain proper compressor operation. Part number 37821 is an OE-style replacement that meets or exceeds OEM requirements.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: Four Seasons Pressure Switch\u003c\/li\u003e\n\u003cli\u003ePart number: 37821\u003c\/li\u003e\n\u003cli\u003eHigh cut-out pressure switch design\u003c\/li\u003e\n\u003cli\u003eSystem mounted configuration\u003c\/li\u003e\n\u003cli\u003eWire lead connector with 2 terminals\u003c\/li\u003e\n\u003cli\u003eM10 x 1.25 fitting thread size\u003c\/li\u003e\n\u003cli\u003eGreen housing color\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM requirements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eThis HVAC pressure switch monitors refrigerant pressure and signals the system when pressure reaches the specified operating threshold. The high cut-out style is used to help interrupt operation at elevated pressure levels, with an off pressure of 260 psi and a high-on operating point of 210 psi. If you are servicing an automotive A\/C system on a Honda Civic, Toyota Camry, or similar vehicle application that uses this style of switch, Four Seasons 37821 provides a direct-fit service part for the correct threaded mount and electrical connection.\u003c\/p\u003e\u003cp\u003eThis part cross-references 1MR2464M and 404284 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Part Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA\/C compressor cycling caused by a faulty pressure switch\u003c\/li\u003e\n\u003cli\u003eHigh-pressure cutoff faults in the HVAC control circuit\u003c\/li\u003e\n\u003cli\u003eIntermittent compressor engagement from worn switch contacts\u003c\/li\u003e\n\u003cli\u003eElectrical connection problems at the wire lead terminals\u003c\/li\u003e\n\u003cli\u003eIncorrect pressure signal from a failed system-mounted switch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the fitting thread size, connector style, terminal count, and pressure specifications before installation. Confirm the replacement matches the vehicle HVAC system layout and the original switch location. For best results, inspect the connector and surrounding refrigerant system components during service.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eFour Seasons 37821 is manufactured to meet or exceed OEM specifications for the listed pressure-switch application. Use this part when you need a direct replacement HVAC pressure switch with the correct pressure range, connector format, and system-mounted design.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":51967374983349,"sku":"BBRN-37821","price":43.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_37821_Fro.jpg?v=1775068138","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-37821-hvac-pressure-switch","provider":"PartCatalog","version":"1.0","type":"link"}