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The Goodman 10123533 is a genuine OEM manual-reset high-limit / rollout safety switch for WGFM195070S3BAD gas furnaces. It opens the control circuit when it senses excessive temperature — from a blocked flue, dirty filter, or heat-exchanger issue — shutting the furnace down to protect against overheating and flame rollout. Because it is manual reset, it requires a deliberate button press after the fault is corrected, ensuring the underlying problem is addressed before the furnace restarts.
The OEM 10123533 is calibrated to the exact trip temperature Goodman specifies for this furnace. A generic switch with the wrong setpoint can nuisance-trip or, worse, fail to trip when it should — a genuine safety concern. For a safety device, always use the OEM-rated part.
Moderate (2/5). Disconnect power, photograph and remove the two spade wires, unscrew the switch, and install the replacement in the same orientation. A multimeter helps confirm continuity. If comfortable working near line-voltage controls this is a quick swap; otherwise use a licensed technician.
Compatible model: WGFM195070S3BAD. Verify your OEM part number before ordering.