{"product_id":"factory-authorized-parts™-hh18ha498-furnace-rollout-limit-switch-180-f-manual-reset","title":"Factory Authorized Parts™ HH18HA498 Furnace Rollout Limit Switch 180°F Manual Reset","description":"\u003ch1\u003eFactory Authorized Parts™ HH18HA498 Furnace Rollout Limit Switch 180°F Manual Reset\u003c\/h1\u003e\n\u003ch2\u003eThe Combustion Chamber Guardian\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHH18HA498\u003c\/strong\u003e is a high-precision safety component designed to act as the \"eyes\" of your furnace’s burner assembly. As a Factory Authorized Parts™ rollout switch, this device is the primary defense against diverted flames—a condition known as \"rollout\"—which occurs when combustion gases cannot exit through the heat exchanger. Specifically engineered for \u003cstrong\u003eCarrier, Bryant, and Payne gas furnaces\u003c\/strong\u003e, this switch monitors the temperature within the burner cabinet. If it detects a thermal spike reaching \u003cstrong\u003e180°F\u003c\/strong\u003e, it instantly breaks the electrical circuit to the gas valve, preventing fire hazards and protecting the internal \"brain\" (control board) from heat damage.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Safety Certification:\u003c\/strong\u003e Engineered as a direct replacement for part number \u003cstrong\u003eHH18HA498\u003c\/strong\u003e, maintaining the rigorous safety standards required for Carrier-family heating equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180°F Thermal Precision:\u003c\/strong\u003e Calibrated to trip at exactly 180°F, ensuring rapid response to flame rollout while preventing nuisance trips during standard operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Reset Protocol:\u003c\/strong\u003e Designed with a manual reset button that requires physical intervention, ensuring the system cannot restart until the underlying safety issue is inspected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Heat Durability:\u003c\/strong\u003e Constructed with a specialized bi-metal disc housed in a corrosion-resistant bracket to withstand the extreme environment of the burner compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFail-Safe Design:\u003c\/strong\u003e The Single-Pole, Single-Throw (SPST) normally closed logic ensures that if the switch fails or a wire is disconnected, the furnace will fail into a safe \"off\" state.\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 \/ Klixon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HH18HA498\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.12 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24V \/ 120V (Pilot Duty)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmps\/Watts:\u003c\/strong\u003e 0.5A @ 24VAC \/ 125VA @ 120VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Compatible with Spark and Hot Surface Ignition systems\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 Manual Push-Button\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\"Take a Picture of the Soot!\"\u003c\/strong\u003e Before you reset a tripped HH18HA498, use your phone to take a picture of the area around the switch. Look for black carbon \"soot\" or scorched paint on the burner box. This switch trips because flames are literally \"rolling out\" of the heat exchanger. After installing the new switch, perform a diagnostic check: if the flames are \"pulling back\" into the heat exchanger when the blower motor kicks on, your heat exchanger is likely cracked and requires immediate professional attention.\u003c\/p\u003e\n\u003ch2\u003eCross-Reference\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded Numbers:\u003c\/strong\u003e HH18HA214, HH18HA215\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Numbers:\u003c\/strong\u003e HH18HA398, 1013444\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawing Numbers:\u003c\/strong\u003e 313362-446, 1NT08L-2446\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite-Rodgers Equivalent:\u003c\/strong\u003e 3L05-180\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModel Compatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e58STA\/STX Series\u003c\/strong\u003e (Suffixes: 045-12, 070-12, 090-14, 110-20, 135-22)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e310A\/J Series\u003c\/strong\u003e (Suffixes: 024045, 036070, 048090, 066110, 066135)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e912S\/915S Series\u003c\/strong\u003e (Suffixes: 30040S, 36060S, 42080S, 60100S)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePG8M Series\u003c\/strong\u003e (Suffixes: 045045, 070070, 090090, 110110)\u003c\/p\u003e\n\u003ch3 class=\"heading-h3-2h4\"\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/h3\u003e","brand":"HVAC Parts and Equipment Depot","offers":[{"title":"Default Title","offer_id":52235437605227,"sku":"662442549686","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/HH18HA498_863b2d59-9764-4c42-b222-ef20746e00d3.jpg?v=1766094421","url":"https:\/\/tophvacparts.com\/products\/factory-authorized-parts%e2%84%a2-hh18ha498-furnace-rollout-limit-switch-180-f-manual-reset","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}