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The Goodman 0130F00035 is a genuine OEM primary high-limit switch — identified by its purple housing — for the Amana/Goodman AMH80453AXCA gas furnace. Mounted on the heat exchanger or blower deck, this thermally activated safety switch opens the control circuit and shuts down the burners if supply-air temperature climbs too high, protecting the furnace from overheating due to restricted airflow, a dirty filter, or a failing blower. The color code corresponds to a specific trip temperature, so matching the exact OEM part is critical.
Limit switches are calibrated to a precise open/close temperature. Installing a generic switch or the wrong color risks either nuisance trips or — dangerously — failing to cut off during a genuine overheat. Always use the color-matched OEM switch.
Easy to Moderate — usually two mounting screws and two wire terminals, but correct orientation on the heat exchanger matters. Turn off power and gas first; a technician is recommended for safety-circuit components.