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The Goodman 10123535 is a genuine OEM red manual reset limit switch for Amana/Goodman AMH950703BXAD 95% AFUE gas furnaces. The red button identifies it as a specific-temperature safety control within the furnace's rollout and high-limit protection circuit. Like all manual reset limits, it opens the 24V control circuit on an over-temperature or flame-rollout event and locks out until an operator presses the reset — preventing the furnace from cycling on an unsafe condition and protecting the heat exchanger and surrounding components.
The red color designates a precise trip temperature — substituting a generic or wrong-color switch risks incorrect set points that either shut the furnace down prematurely or, worse, fail to protect against a real rollout. The OEM 10123535 matches Goodman's exact calibration and mounting, guaranteeing proper safety response. For any life-safety control, genuine OEM is strongly recommended.
Moderate (3/5). Requires low-voltage wiring work and correct switch placement. Disconnect power at the breaker first. Unscrew the failed switch, move the spade terminals to the new one, and remount securely. Investigate and resolve the cause of any trip before resetting. Best handled by an experienced DIYer or licensed HVAC pro.