{"product_id":"erp-replacement-limit-switch-hh12zb180","title":"Furnace Plenum High-Limit Switch For: Carrier, Bryant HH12ZB180, SHL514, ERHH12ZB180","description":"\u003ch2\u003eFurnace Plenum High-Limit Switch For: Carrier, Bryant HH12ZB180, SHL514, ERHH12ZB180\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eSafety first:\u003c\/strong\u003e A qualified HVAC technician should disconnect and verify isolation of electrical power before service.\u003c\/p\u003e\u003cp\u003eRestore safe furnace operation with this ERP replacement plenum high-limit switch for compatible Carrier and Bryant furnace plenum applications. The Supco gas-furnace limit table maps HH12ZB180 to SHL514: it opens at 180°F, closes at 140°F, with a 40°F differential, SPST. Repeated high-limit shutdowns require diagnosis of overheating, airflow, and the limit control. Verify probe insertion length, mounting, terminals, and load rating against the original before ordering. A similar temperature marking alone does not establish fit.\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e ERHH12ZB180\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840993028380\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpens at:\u003c\/strong\u003e 180°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCloses at:\u003c\/strong\u003e 140°F (40°F differential)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e SPST temperature-limit switch\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Part Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHH12ZB180\u003c\/li\u003e\n\u003cli\u003eSHL514\u003c\/li\u003e\n\u003cli\u003eERHH12ZB180\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement:\u003c\/strong\u003e Replaces the listed furnace plenum high-limit switch part numbers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverheat protection:\u003c\/strong\u003e Opens at 180°F and resets at 140°F in the supply plenum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatched control:\u003c\/strong\u003e SPST switch with a 40°F differential.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation check:\u003c\/strong\u003e Match the probe insertion length, mounting, terminals, and load rating with the original.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFixes These Symptoms\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace shuts down repeatedly on high-limit\u003c\/li\u003e\n\u003cli\u003eBurners cut off before the thermostat is satisfied\u003c\/li\u003e\n\u003cli\u003eBlower runs but heat output is interrupted\u003c\/li\u003e\n\u003cli\u003eLimit switch is stuck open or fails its continuity test\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Brands\u003c\/h3\u003e\u003cp\u003eCarrier, Bryant\u003c\/p\u003e\u003ch3\u003eCompatible Models\u003c\/h3\u003e\u003cp\u003eFits various models. Please verify compatibility with us before ordering\u003c\/p\u003e\u003ch3\u003eInstallation Instructions\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eDisconnect and verify isolation of electrical power before service.\u003c\/li\u003e\n\u003cli\u003eConfirm the original cutoff and reset temperatures, terminals, insertion length, and mounting.\u003c\/li\u003e\n\u003cli\u003eInvestigate overheating or airflow problems before replacing the limit switch.\u003c\/li\u003e\n\u003cli\u003eInstall the new switch and connect the wiring to the matching terminals.\u003c\/li\u003e\n\u003cli\u003eFollow the furnace service manual and verify safe operation before returning the system to service.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eNever bypass the switch or install a higher-temperature limit to prevent shutdowns. Use a qualified HVAC technician for this repair.\u003c\/p\u003e\u003cp\u003eFor appliance cleaning products, visit \u003ca href=\"https:\/\/authenticapplianceparts.com\/search?q=affresh\u0026amp;type=product\"\u003eaffresh appliance cleaning products\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eSafety Disclosure\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProp 65 Warning:\u003c\/strong\u003e Cancer and Reproductive Harm – www.P65Warnings.ca.gov\u003c\/p\u003e","brand":"ERP","offers":[{"title":"Default Title","offer_id":50280838004979,"sku":"ERHH12ZB180","price":6.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/7859\/2755\/files\/HH12ZB180.jpg?v=1788436004","url":"https:\/\/authenticapplianceparts.com\/products\/erp-replacement-limit-switch-hh12zb180","provider":"Authentic Appliance Parts","version":"1.0","type":"link"}