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The Goodman 10123534 Manual Reset Limit Switch is a genuine OEM high-limit safety control for the ACVC90704CXAB condensing gas furnace. This switch monitors heat-exchanger and plenum temperature and opens the circuit if the furnace overheats — typically from a dirty filter, blocked vent, or blower failure. The manual reset button requires a technician to inspect and clear the fault before the furnace will fire again, an important safeguard against repeated overheating.
This genuine Goodman OEM limit switch is calibrated to the exact trip and reset temperatures specified for this furnace. Substituting a generic switch with the wrong setpoint can either nuisance-trip during normal operation or, worse, fail to protect the heat exchanger. OEM is the only safe choice for a safety control.
Moderate (2/5). Disconnect power, remove the two mounting screws and the spade connectors, and install the matching replacement. Always diagnose and correct the underlying cause of the overheat before resetting. Allow about 20 minutes; a multimeter is recommended to confirm continuity.