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The 10123529 is a genuine OEM Goodman manual reset limit switch designed for the ACVC801005CXAA gas furnace and compatible Goodman/Amana 80% AFUE models. This high-temperature safety control opens the burner circuit if it senses excessive heat — typically from a blocked flue, failed blower, or flame rollout — and must be manually reset, ensuring a technician inspects the furnace before it restarts. It is a critical, code-required safety device.
OEM switches are calibrated to Goodman's exact trip temperature and reset characteristics, so the furnace's safety logic behaves as designed. Generic switches with mismatched trip points can nuisance-trip or, worse, fail to open at the correct temperature. For a safety control, always use the genuine OEM part.
Easy–Moderate (2/5). Disconnect power, unplug the two spade terminals, unscrew the switch, and mount the replacement in the same orientation. Always diagnose why the original tripped before returning the furnace to service.