{"product_id":"carrier-hvac-hh19za135-limit-switch-thermostat-l135-40f-auto-reset","title":"Carrier HVAC HH19ZA135 Limit Switch\/Thermostat, L135-40F, Auto Reset","description":"\u003cp\u003eThe \u003cstrong\u003eCarrier HH19ZA135\u003c\/strong\u003e is a genuine OEM temperature limit switch and thermostat designed to regulate and protect your HVAC system by monitoring temperature thresholds and triggering automatic responses when limits are reached. With an \u003cstrong\u003eL135-40F rating\u003c\/strong\u003e and \u003cstrong\u003eauto reset functionality\u003c\/strong\u003e, this switch restores normal operation once temperatures return to safe levels — minimizing downtime and service interruptions.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HH19ZA135\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Temperature Switch Actuator (Limit Switch \/ Thermostat)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e L135-40F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReset Type:\u003c\/strong\u003e Auto Reset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type:\u003c\/strong\u003e Surface Mount\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Position:\u003c\/strong\u003e Any Position\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGenuine OEM Reliability\u003c\/h3\u003e\n\u003cp\u003eAs a real OEM component, the \u003cstrong\u003eHH19ZA135\u003c\/strong\u003e is engineered to deliver consistent response and calibrated performance throughout its service life. Unlike aftermarket alternatives, genuine OEM switches help prevent system breakdowns caused by signal drift, misreads, or intermittent faults — ensuring your HVAC system operates within safe and stable temperature parameters.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Models\u003c\/h3\u003e\n\u003cp\u003eThis limit switch is confirmed to fit the following popular Carrier models:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e52BQB311 — 400AA\u003c\/li\u003e\n  \u003cli\u003e52BRA309 — 301EP\u003c\/li\u003e\n  \u003cli\u003e52BQA314 — 300CP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways verify your model and part number before ordering to ensure proper fitment.\u003c\/p\u003e\n\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0\" \u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0\" \u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0\" \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"carrier","offers":[{"title":"Default Title","offer_id":51297571209522,"sku":"HH19ZA135","price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/malachypartsplus.com\/products\/carrier-hvac-hh19za135-limit-switch-thermostat-l135-40f-auto-reset","provider":"Malachy Parts+","version":"1.0","type":"link"}