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The genuine Goodman 0130F00035 primary high-limit switch is the factory OEM overheat safety control for the ACVC960603BNAA 96% modulating gas furnace and related Goodman/Amana models. Identified by its purple housing, this thermal limit opens the gas valve and ignition circuit if the heat exchanger or supply plenum exceeds a safe temperature—protecting the furnace and your home from overheating caused by restricted airflow, a dirty filter, or a failed blower.
The OEM Goodman limit is calibrated to the exact trip and reset temperatures your furnace's control board expects, with the correct bracket and terminal placement. A generic limit with the wrong setpoint can either nuisance-trip (no heat) or fail to protect the heat exchanger—a safety part is the wrong place to economize. Match the purple color code to confirm correct placement.
Easy to Moderate (20–30 minutes). Cut power at the disconnect, remove two mounting screws, transfer the spade connectors, and seat the new switch flush against the plenum. A multimeter to confirm the old switch is open aids diagnosis. If the limit keeps tripping, correct the underlying airflow problem before replacing.