{"product_id":"carrier-hh18ha449-for-58tua040","title":"Carrier Limit Switch Rollout HH18HA449 for Model 58TUA040","description":"\u003cp\u003eDirect factory replacement \u003cb\u003eHH18HA449\u003c\/b\u003e for the Carrier \u003cb\u003e58TUA040\u003c\/b\u003e, matched to the original build sheet. Fitment guaranteed — free returns if it doesn't fit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSetpoint\u003c\/td\u003e\n\u003ctd\u003e350F open (L350)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReset\u003c\/td\u003e\n\u003ctd\u003emanual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAction\u003c\/td\u003e\n\u003ctd\u003eopens on rise (flame rollout \/ high-limit safety), SPST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eflame rollout limit switch, manual reset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXref\u003c\/td\u003e\n\u003ctd\u003eTherm-O-Disc 60T series L350-MR; replaces HH18HA250\/HH18HA350\/HH18HA351, 95-314681, 95-314683, HH18HA449A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote\u003c\/td\u003e\n\u003ctd\u003eL350F flame rollout switch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003eHH18HA449\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eCarrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew — genuine OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eSymptoms of a failing limit switch\u003c\/h3\u003e\u003cp\u003eWatch for: The unit fails to complete its normal cycle, visible wear, corrosion, or heat damage on the part, intermittent operation that worsens. Catching it early protects the components around it.\u003c\/p\u003e\u003ch3\u003eReplacement guide\u003c\/h3\u003e\u003cp\u003eKill power before servicing and photograph the wiring and mounting. Swap the part, torque fasteners evenly, and route wires away from hot or moving surfaces. Run a complete cycle and verify normal operation before closing the panel.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eIs this the exact OEM part for my 58TUA040?\u003c\/b\u003e Yes — verified factory fitment for that model.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eNot sure of your model?\u003c\/b\u003e Chat with Mike with the number from your unit's nameplate and we'll confirm before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":63838515724659,"sku":"CARRIE-58TUA040-HH18HA449","price":44.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/carrier-hh18ha449-for-58tua040","provider":"National HVAC Parts","version":"1.0","type":"link"}