{"product_id":"factory-authorized-parts™-hh18ha416-furnace-high-limit-safety-switch-180-f","title":"Factory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F","description":"\u003ch1\u003eFactory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F\u003c\/h1\u003e\n\u003ch2\u003eThe Critical Safety Sentinel of Your Furnace\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHH18HA416\u003c\/strong\u003e is a genuine Factory Authorized Parts™ High Limit Switch, acting as the primary safety \"gatekeeper\" for your HVAC system. This component is the critical hardware link that prevents your furnace from reaching dangerous internal temperatures. If the airflow is restricted or the heat exchanger becomes too hot, this switch triggers an immediate system shutdown to prevent equipment damage and ensure household safety. As a genuine OEM replacement, it is calibrated to the exact thermal specifications required by \u003cstrong\u003eCarrier, Bryant, and Payne\u003c\/strong\u003e equipment, ensuring the system operates within its engineered safety margins.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Thermal Protection:\u003c\/strong\u003e Specifically calibrated to open at \u003cstrong\u003e180°F\u003c\/strong\u003e, providing an essential fail-safe against furnace overheating and potential fire hazards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability:\u003c\/strong\u003e Part number \u003cstrong\u003eHH18HA416\u003c\/strong\u003e is a Factory Authorized Part, ensuring the metallurgy of the bi-metal disc meets strict manufacturer tolerances for cycle life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Safety Integration:\u003c\/strong\u003e Engineered to communicate instantly with the furnace control board to kill the gas valve circuit when thermal limits are exceeded.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolved Nuisance Tripping:\u003c\/strong\u003e Replaces worn or \"weak\" switches that have drifted from their original temperature settings, preventing premature system lockouts and noise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Carrier Family Fit:\u003c\/strong\u003e Designed for a seamless mechanical fit across a wide range of gas furnace platforms without the need for drilling or bracket modification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Factory Authorized Parts™ (Carrier\/Bryant\/Payne)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e United Technologies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HH18HA416\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24V (Control Circuit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Temperature:\u003c\/strong\u003e 180°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Type:\u003c\/strong\u003e Automatic Reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Flange Mount \/ Insertion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\"Check Your Airflow First!\"\u003c\/strong\u003e If you are replacing this switch because the old one \"tripped\" or \"failed open,\" always inspect your air filter and evaporator coil before firing the unit back up. A limit switch often fails because it has been forced to cycle too many times due to restricted airflow. If the switch trips again immediately after installation, check for a blocked return air duct or a failing blower motor—the switch is likely doing its job and protecting you from a larger mechanical issue!\u003c\/p\u003e\n\u003ch2\u003eCross-Reference\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy \/ Superseded Numbers:\u003c\/strong\u003e HH18HA411, HH18HA415\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawing Numbers:\u003c\/strong\u003e 313362-402\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent \/ Related Brands:\u003c\/strong\u003e Carrier, Bryant, Payne, Day \u0026amp; Night, White-Rodgers Thermal Disc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModel Compatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e310A\/310J Series\u003c\/strong\u003e (Suffixes: 024040, 036040, 036060, 048080, 060100)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e58SB\/58SC Series\u003c\/strong\u003e (Suffixes: 040-08, 040-12, 060-12, 080-16, 100-20, 120-22)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e912S\/915S Series\u003c\/strong\u003e (Suffixes: 30040S, 36060S, 42080S, 48080S, 60100S, 60120S)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePG8M Series\u003c\/strong\u003e (Suffixes: 045040, 045070, 070110)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":52235445829995,"sku":"662441983443","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/HH18HA416-1.jpg?v=1772039212","url":"https:\/\/tophvacparts.com\/products\/factory-authorized-parts%e2%84%a2-hh18ha416-furnace-high-limit-safety-switch-180-f","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}