The York / Coleman S1?025?31813?000 is a 3-inch automatic?reset limit switch rated L160?30F, meaning it opens at 160°F and closes at 130°F. This SPST, open?on?rise safety limit is used in York, Coleman, and Source?1 furnaces to prevent overheating by interrupting burner operation when temperatures exceed safe levels.

This OEM insert?style limit switch provides reliable temperature protection and restores proper furnace safety performance when the original limit has failed or drifted out of calibration. Ideal for mobile?home and residential York/Coleman heating systems.

• 130–160°F automatic limit switch, 3" insert

Technician Notes

• Insertion length: 3"

• Reset type: Automatic

• Circuit: SPST, normally closed

• Function: Opens on temperature rise at 160°F, recloses at 130°F

• Replace if furnace short?cycles, overheats, or fails to start due to open limit.

• Always match temperature rating and insertion length when replacing.