{"product_id":"oem-goodman-150-f-primary-limit-switch-for-ams81405dnbb-20162903","title":"OEM Goodman 150°F Primary Limit Switch for AMS81405DNBB — 20162903","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e20162903 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control engineered for the Goodman\/Amana \u003cstrong\u003eAMS81405DNBB\u003c\/strong\u003e gas furnace and compatible 80% AFUE models. This normally-closed thermal switch monitors heat-exchanger and plenum temperatures, opening the burner and ignition circuit whenever supply air exceeds its \u003cstrong\u003e150°F\u003c\/strong\u003e factory cutout to prevent overheating, cracked heat exchangers, and nuisance shutdowns.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162903\u003c\/li\u003e\n\u003cli\u003eType: Primary high-limit (auto-reset)\u003c\/li\u003e\n\u003cli\u003eCutout Temperature: 150°F\u003c\/li\u003e\n\u003cli\u003eCircuit: Normally closed (opens on rise)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMS81405DNBB furnaces\u003c\/li\u003e\n\u003cli\u003eApplication: 80% single-stage\/multi-speed gas furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eChoosing the genuine \u003cstrong\u003eOEM Goodman 20162903\u003c\/strong\u003e guarantees an exact temperature calibration, bracket footprint, and terminal orientation that drop into your existing wiring harness without modification. Aftermarket \"universal\" limits often differ in trip point or mounting depth, which can cause premature tripping or improper heat-exchanger protection. For a safety-critical control we recommend the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy (2\/5)\u003c\/h3\u003e\u003cp\u003eReplacement is a straightforward two-wire swap for a homeowner with basic tools. Shut off power and gas, remove the two mounting screws, transfer the spade connectors, and reinstall. No brazing or refrigerant work required. Always confirm the furnace fault clears and cycles normally after replacement. If you are unsure, consult a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057139499379,"sku":"GOODMAN-20162903","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-ams81405dnbb-20162903","provider":"National HVAC Parts","version":"1.0","type":"link"}