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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM high-limit safety device for the WGFM295115V5DAB gas furnace. Mounted in the heat-exchanger air stream, it continuously senses supply-air temperature and opens the circuit to the gas valve if the furnace overheats — typically from restricted airflow, a dirty filter, or a failed blower. This protects the heat exchanger from cracking and prevents unsafe operating temperatures.
The Genuine OEM control carries Goodman's factory-calibrated trip and reset temperatures, matched to this furnace's rated rise range — critical for both safety and avoiding nuisance shutdowns. Our Generic-equivalent meets the same temperature and electrical ratings at a lower cost for out-of-warranty service. Both are new, tested units.
Difficulty: Easy (2/5). Disconnect power, transfer the two spade terminals, remove the mounting screws, and install the replacement in the identical position and orientation. Restore the filter/airflow fault first — if the limit keeps tripping, the problem is restricted airflow, not the control. Verify a full heat cycle on startup.