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The Goodman 10123535 is a genuine OEM red-body manual reset limit switch built for the GKS90704CXAB furnace and related Goodman/Amana gas models. The red housing typically designates a higher trip-temperature or flame-rollout position within the furnace, guarding against overheating and flame rollout at the burner assembly. When the switch senses an unsafe temperature it opens the control circuit, shutting down the burners until the fault is corrected and the switch is manually reset.
The red 10123535 is factory-calibrated to Goodman's rollout trip spec. Generic substitutes with the wrong trip temperature can allow dangerous rollout conditions or cause repeated nuisance lockouts. As a life-safety component, the genuine OEM switch is the recommended choice and keeps your equipment warranty intact.
Easy (1 of 5) — Cut power and gas, remove the two spade terminals, unbolt the old switch, and install the replacement in the same orientation. Typical time: 10–15 minutes.