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The Goodman 20269903 is an auxiliary auto-reset limit switch designed for the GMP150-5 gas furnace. Unlike a manual-reset limit, this switch automatically restores the circuit once temperatures return to a safe range, providing secondary overheat protection without requiring a service call to reset. It's frequently mounted near the blower housing or secondary heat exchanger area.
The OEM auto-reset switch guarantees the correct trip and reset temperatures and a drop-in mounting fit. The generic alternative matches the same specifications for cost-conscious repairs while maintaining reliable auto-reset operation.
Easy (1/5). Disconnect furnace power, transfer the two wire leads, and secure with the existing screw(s). Most techs complete this in 10–15 minutes.