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The Goodman 10123534 Manual Reset Limit Switch is the genuine OEM flame-rollout safety cutout for the GCH950904CXAD 95% AFUE gas furnace. Unlike an auto-reset limit, this manual-reset switch latches open when it senses flame rollout or dangerous overtemperature near the burner box — it will not restore heat until a technician presses the reset button, ensuring a serious fault (blocked flue, cracked heat exchanger, or bad inducer) is investigated before the furnace runs again.
Because this is a life-safety device, the trip temperature and reset mechanism must match Goodman's spec precisely. Generic substitutes with a different trip point can either mask a rollout condition or trip constantly. The genuine 10123534 provides the exact factory calibration and mounting fit.
Difficulty: Easy–Moderate (2/5). If this switch has tripped, find and fix the root cause (airflow/flue/heat exchanger) first. Power down, transfer the two leads, remount to the burner assembly, then press reset and verify a clean ignition cycle.