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The Goodman 20162903 is a factory OEM primary high-limit switch engineered for the GKS90703BXAE gas furnace and compatible Goodman/Amana 90% AFUE models. This safety control continuously monitors heat-exchanger temperature and opens the burner circuit if the furnace exceeds its 150°F trip point — protecting the unit from overheating caused by restricted airflow, a dirty filter, or a failed blower.
This is a genuine Goodman OEM switch calibrated to the exact trip temperature your furnace's control board expects. Universal aftermarket limit switches often use a different set point or mounting bracket, which can cause nuisance lockouts or short-cycling. For a safety-critical component, we recommend OEM.
Easy (1/5). Two mounting screws and two spade terminals. Always shut off power and gas at the furnace before servicing. If you are unsure, consult a licensed HVAC technician.