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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM high-limit safety switch for the VMES960803BNAA gas furnace and compatible Goodman/Amana models. Mounted on the heat-exchanger/blower bulkhead, this auto-reset control continuously monitors supply-plenum temperature. If airflow is lost — from a dirty filter, failed blower, or closed dampers — it opens the gas-valve circuit before the heat exchanger overheats, then automatically closes once temperatures normalize. It is the furnace's primary overheat protection and a common failure point on units that have run with restricted airflow.
The OEM Goodman 20162904 ships with the exact trip temperature and probe/disc length Goodman specified for this cabinet. Because limit setpoint and sensor placement are tuned to the heat-exchanger design, a mismatched generic control can nuisance-trip on normal heat calls or, worse, fail to cut off during a real overheat. On a primary safety control, the factory part is non-negotiable.
Moderate (2/5) — Cut furnace power, transfer the wiring one lead at a time, remove the mounting screws, and install the new control in the identical position and orientation. Basic hand tools and roughly 15 minutes. Verify heat-rise stays within the model's rating plate after replacement.
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