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The Goodman 10123535 Manual Reset Limit Switch (red-button variant) is a genuine OEM flame rollout safety control for the Goodman GKS90703BXAC gas furnace. The red button indicates a higher temperature trip rating than the standard limit, and it is typically positioned at the burner box to detect flame rollout conditions.
The red and non-red (10123533) limit switches trip at different temperatures and are not interchangeable. Using the correct OEM 10123535 guarantees the burner-box rollout protection is calibrated exactly as Goodman engineered it — a critical safety distinction generics rarely match.
Easy to Moderate — Spade-terminal swap after cutting power. Verify you are replacing the red-button rollout switch, not the main high limit. If the switch keeps tripping, have a technician diagnose the rollout cause before continuing to reset it.