{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-gmth045-3-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for GMTH045-3 — B1370155","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370155 Auxiliary Limit Switch\u003c\/strong\u003e is a genuine OEM safety control engineered for the \u003cstrong\u003eGMTH045-3\u003c\/strong\u003e gas furnace. This normally-closed thermal limit switch opens at approximately 120°F to protect the blower compartment and secondary heat exchanger area from overheating, shutting down the burners if airflow is restricted or temperatures climb beyond safe limits. Installing the correct factory-spec switch keeps your furnace's high-limit protection working exactly as designed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1370155\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Auxiliary \/ high-limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Temperature:\u003c\/strong\u003e 120°F (nominal cut-out)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Configuration:\u003c\/strong\u003e Normally Closed (opens on rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Model:\u003c\/strong\u003e Goodman GMTH045-3 furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eChoosing the genuine Goodman B1370155 guarantees the exact trip temperature, mounting footprint, and terminal spacing your furnace's control board expects. Generic aftermarket limit switches may carry a different cut-out point or bracket, which can cause nuisance lockouts or, worse, fail to trip when needed. For a safety-critical component, the OEM part is the reliable choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy — Intermediate DIY (2\/5).\u003c\/strong\u003e Replacement typically involves cutting power at the breaker, removing two mounting screws, and transferring the spade connectors. Basic hand tools and a multimeter to confirm continuity are all that's required. If you are unsure about furnace safety wiring, have a licensed HVAC technician perform the swap.\u003c\/p\u003e\u003cp\u003eShips fast and backed by genuine Goodman quality. Keep your GMTH045-3 running safely — order the B1370155 today.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058165268851,"sku":"GOODMAN-12515","price":14.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-gmth045-3-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}