{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-gdt070-3b-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for GDT070-3B — B1370155","description":"\u003ch2\u003eGoodman B1370155 Auxiliary Limit Switch (120°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGoodman B1370155\u003c\/strong\u003e auxiliary limit switch is the factory-specified overheat safety for the \u003cstrong\u003eGDT070-3B\u003c\/strong\u003e gas furnace. It watches blower-compartment and secondary heat-exchanger temperatures and opens the control circuit to stop the burners if heat exceeds its 120°F trip point. Common failure symptoms include short-cycling on the heat call, intermittent no-heat, or a furnace that runs the blower but won't light — all reasons to replace an aged or drifted limit switch.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1370155\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Auxiliary (secondary) limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 120°F (automatic reset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e Goodman GDT070-3B furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Overtemperature safety cutout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment:\u003c\/strong\u003e Gas furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis genuine \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e switch is calibrated to the precise 120°F set point your furnace board expects. Generic equivalents may cost less but often carry wider temperature tolerances, leading to premature nuisance trips or delayed protection. On a safety component, the OEM part is the reliable choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRating: Easy (1\/5).\u003c\/strong\u003e Kill power at the breaker, pull the two spade terminals, unscrew the old switch, and mount the replacement in the same orientation. Reconnect and restore power. Typical replacement time is 10–15 minutes with basic hand tools. If the limit keeps tripping after replacement, check for restricted airflow (dirty filter, closed vents, failing blower) or consult a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058079875443,"sku":"GOODMAN-10437","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-gdt070-3b-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}