{"product_id":"oem-goodman-240-f-3-in-primary-limit-switch-gdt090-4a-1370903s","title":"OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 1370903S","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e1370903S\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003eprimary limit switch\u003c\/strong\u003e rated at \u003cstrong\u003e240°F\u003c\/strong\u003e with a \u003cstrong\u003e3 in insertion depth\u003c\/strong\u003e, built for \u003cstrong\u003eGDT090-4A\u003c\/strong\u003e gas furnaces. Mounted on the heat-exchanger plenum, this auto-reset high-limit control opens the circuit if supply-air temperature climbs too high — protecting the heat exchanger from overheating due to low airflow, a dirty filter, or blower failure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 240°F (opens on rise)\u003c\/li\u003e\n\u003cli\u003eInsertion depth: 3 in probe\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (closes on cool-down)\u003c\/li\u003e\n\u003cli\u003eFunction: Primary high-limit safety\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GDT090-4A furnace\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 1370903S\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM 1370903S\u003c\/strong\u003e matches the precise 240°F set point and 3 in probe length calibrated to this furnace's plenum, so the disc sits at the correct sensing depth. A generic with the wrong length or temperature can nuisance-trip on every heat call or fail to protect the heat exchanger. For high-limit safety controls, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — two mounting screws and two spade terminals, roughly 15–20 minutes. Power off at the disconnect before starting. If the original tripped, correct the underlying airflow restriction before running the furnace again.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058080366963,"sku":"GOODMAN-10458","price":29.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-240-f-3-in-primary-limit-switch-gdt090-4a-1370903s","provider":"National HVAC Parts","version":"1.0","type":"link"}