{"product_id":"oem-goodman-auxiliary-limit-auto-reset-switch-for-gmv81155cxa-20269903","title":"OEM Goodman Auxiliary Limit Auto-Reset Switch for GMV81155CXA — 20269903","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20269903 Auxiliary Limit Auto-Reset Switch\u003c\/strong\u003e is a genuine OEM safety control for \u003cstrong\u003eGMV81155CXA\u003c\/strong\u003e 80% two-stage variable-speed furnaces. This auxiliary high-limit switch monitors temperature in its mounting location and opens the control circuit if the furnace overheats — shutting down the burners to prevent heat-exchanger and cabinet damage. Because it is an \u003cem\u003eauto-reset\u003c\/em\u003e switch, it re-closes on its own once the temperature returns to a safe range. Repeated tripping usually points to restricted airflow (dirty filter, blocked return, or failing blower) rather than a bad switch, so confirm airflow before condemning the part.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 20269903\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Auxiliary high-limit safety switch, automatic reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMV81155CXA and compatible GMV81xxx furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Opens control circuit on over-temperature; auto-recloses when cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eLimit switches are safety devices calibrated to a specific trip temperature and mount profile. A generic switch with a different setpoint or terminal layout can nuisance-trip or, worse, fail to protect the furnace. The genuine Goodman 20269903 is factory-calibrated for this cabinet, ensuring the switch trips exactly when the OEM design intends. Aftermarket equivalents exist but should match the exact rating — the OEM part removes that guesswork.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate.\u003c\/strong\u003e Remove the two mounting screws, transfer the wire terminals, and mount the new switch in the same orientation. About 15 minutes with a nut driver. \u003cstrong\u003eDisconnect furnace power and verify zero voltage first,\u003c\/strong\u003e and inspect airflow to rule out the root cause of any overheating.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058170052979,"sku":"GOODMAN-12664","price":29.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-auxiliary-limit-auto-reset-switch-for-gmv81155cxa-20269903","provider":"National HVAC Parts","version":"1.0","type":"link"}