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The Goodman 10123535 Manual Reset Limit Switch (Red) is a genuine OEM high-temperature safety control for the GMH950704CXAD 96% AFUE two-stage gas furnace and compatible Goodman/Amana equipment. The red-bodied switch typically denotes a higher trip temperature than its companion 10123533 and is used at a specific location in the furnace's safety chain. It opens the burner circuit on an overheat event and, being manual-reset, requires a deliberate button press to restore operation so the fault can be diagnosed first.
Color and trip temperature matter on this part. The genuine Goodman OEM 10123535 is calibrated to the exact cut-out point your furnace was designed around. Substituting a generic switch — or confusing the red unit with the differently rated 10123533 — can cause premature lockouts or leave the heat exchanger under-protected. Match the OEM number and color for correct, safe operation.
Rated Easy (2/5) — about 20 minutes. Cut power at the disconnect and close the gas valve, remove the mounting screws, move the spade connectors to the new switch, and reassemble. Confirm the reset button is seated before restoring power. If you are unsure which of the two limit switches you need, verify the printed part number on the original before ordering.