{"product_id":"york-s1-02435271000-genuine-oem-furnace-pressure-switch-0-50-wc","title":"York S1-02435271000 – Genuine OEM Furnace Pressure Switch (0.50\" WC)","description":"\u003ch1 data-pm-slice=\"1 3 []\"\u003eYork S1-02435271000 – Genuine OEM Furnace Pressure Switch (0.50\" WC)\u003c\/h1\u003e\n\u003cp data-pm-slice=\"1 3 []\"\u003eThe \u003cstrong\u003eYork S1-02435271000\u003c\/strong\u003e is a precision-calibrated genuine OEM safety pressure switch designed for York, Coleman, and Luxaire gas furnaces. This component acts as a critical \"go\/no-go\" safety monitor for the furnace's venting system. It ensures that the draft inducer motor is creating enough negative pressure to safely exhaust combustion gases out of the home. If the switch does not detect the required vacuum, it prevents the gas valve from opening, protecting your home from potential carbon monoxide buildup.\u003c\/p\u003e\n\u003cp\u003eTechnically, this is a \u003cstrong\u003eSingle Pole Normally Open (SPNO)\u003c\/strong\u003e switch calibrated to \u003cstrong\u003eClose on Fall\u003c\/strong\u003e at \u003cstrong\u003e0.50\" WC\u003c\/strong\u003e (Water Column). This means the internal diaphragm must sense a specific drop in pressure before completing the electrical circuit to the control board. Choosing a genuine York S1-02435271000 ensures that the internal spring tension and diaphragm material are perfectly matched to your furnace's specific blower curve and venting requirements.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSafety Interlock:\u003c\/strong\u003e Prevents ignition if a blocked flue, cracked heat exchanger, or failing inducer motor is detected.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Calibration:\u003c\/strong\u003e Factory-set at 0.50\" WC to maintain the exact safety margins required by the furnace manufacturer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGold-Flash Contacts:\u003c\/strong\u003e Features high-quality internal contacts to prevent oxidation and ensure a reliable electrical signal over thousands of cycles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDirect-Fit Housing:\u003c\/strong\u003e Includes the correct hose barb orientation and mounting footprint for a seamless, \"no-modification\" installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e S1-02435271000 (Replaces 024-35271-000)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e York \/ Johnson Controls (Genuine OEM)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePart Type:\u003c\/strong\u003e Air Pressure Switch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSet Point:\u003c\/strong\u003e 0.50\" WC (Water Column)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eContact Arrangement:\u003c\/strong\u003e SPNO (Normally Open)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAction:\u003c\/strong\u003e Close on Fall\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eConnections:\u003c\/strong\u003e Two-wire 1\/4\" male terminals and single vacuum hose port.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip: The \"Blocked Port\" Check\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBefore replacing this switch, always use a small paperclip or wire to gently clear the \"orifice\" or port on the furnace's collector box where the vacuum hose attaches. Scale and debris often clog this tiny hole, causing a perfectly good pressure switch to stay open. Also, inspect the tubing for any tiny cracks or \"dry rot\" that could cause a vacuum leak and a false \"Switch Open\" error code.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference \u0026amp; Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe S1-02435271000 is a direct replacement for the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eYork\/JCI Numbers:\u003c\/strong\u003e 024-35271-000, 02435271000, S1-024-35271-000\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSource 1:\u003c\/strong\u003e S1-02435271000\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eExtensive Model Compatibility List:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eYork \/ Coleman \/ Luxaire Furnaces:\u003c\/strong\u003e Compatible with various 80% AFUE and 90%+ AFUE single-stage and two-stage models including the TG8S, TG9S, and TM9 series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"York","offers":[{"title":"Default Title","offer_id":52647825703275,"sku":"S1-02435271000","price":68.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/S1-02435311000_2b09976c-a76b-498e-a520-f5ad0dde8e65.jpg?v=1765311803","url":"https:\/\/tophvacparts.com\/products\/york-s1-02435271000-genuine-oem-furnace-pressure-switch-0-50-wc","provider":"HVAC Parts and Equipment Depot","version":"1.0","type":"link"}