{"product_id":"carrier-hvac-hh12zb150-limit-switch-auto-reset-spst-l150f-40","title":"Carrier HVAC HH12ZB150 Limit Switch, Auto Reset, SPST, L150F-40","description":"\u003cbody\u003e\n\n\n\u003cp\u003eThe \u003cstrong\u003eCarrier HH12ZB150\u003c\/strong\u003e is a factory-specified \u003cstrong\u003eautomatic reset limit switch\u003c\/strong\u003e designed for use in Carrier HVAC systems. This precision safety component monitors temperature levels to protect your heating system from overheating conditions, automatically resetting once temperatures return to a safe operating range.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HH12ZB150\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e Limit Switch with Auto Reset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCircuit Configuration:\u003c\/strong\u003e SPST (Single Pole, Single Throw)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e L150F-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpen Temperature:\u003c\/strong\u003e 150°F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDifferential:\u003c\/strong\u003e 40°F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClose Temperature:\u003c\/strong\u003e 110°F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Carrier\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThis \u003cstrong\u003eSPST automatic reset limit switch\u003c\/strong\u003e opens the circuit when the sensed temperature reaches \u003cstrong\u003e150°F\u003c\/strong\u003e, shutting down the heating system to prevent damage from excessive heat. Once the temperature drops by \u003cstrong\u003e40°F\u003c\/strong\u003e to approximately \u003cstrong\u003e110°F\u003c\/strong\u003e, the switch automatically resets and closes the circuit, restoring normal system operation — no manual intervention required.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Auto Reset Matters\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eautomatic reset functionality\u003c\/strong\u003e makes this limit switch ideal for applications where temporary overheating conditions may occur. Rather than requiring a technician or homeowner to manually reset the switch after each event, the switch self-resets once conditions are safe, reducing downtime and service calls.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Application\u003c\/h3\u003e\n\u003cp\u003eThis is a \u003cstrong\u003egenuine Carrier OEM replacement part\u003c\/strong\u003e engineered specifically for Carrier HVAC equipment. Using an OEM-specified limit switch ensures proper fit, reliable performance, and maintained system safety standards. Always verify compatibility with your specific Carrier unit model before installation.\u003c\/p\u003e\n\n\n\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\n\u003c\/body\u003e","brand":"carrier","offers":[{"title":"Default Title","offer_id":51297568882994,"sku":"HH12ZB150","price":0.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/malachypartsplus.com\/products\/carrier-hvac-hh12zb150-limit-switch-auto-reset-spst-l150f-40","provider":"Malachy Parts+","version":"1.0","type":"link"}