York s1-02533325000 Limit Switch Auto Reset 195 165F

Product Description

The YORK s1-02533325000 is an automatic-reset high-limit switch used in gas furnaces and air handlers to protect heat exchangers and system components from overtemperature conditions. The switch opens at 195 degrees F and closes at 165 degrees F, interrupting the burner circuit when the supply-air temperature exceeds the setpoint and automatically restoring operation once temperatures drop back to the close threshold. Licensed HVAC technicians install this component as a direct OEM replacement during routine service or after a no-heat diagnostic points to a failed or out-of-spec limit device.

This limit switch is suited for residential gas furnaces where automatic-reset high-limit protection is required. It mounts in the supply-air plenum or heat exchanger compartment, where it monitors discharge air or heat exchanger temperature. The auto-reset design eliminates the need for a manual reset after a nuisance trip, provided the root cause of the overtemperature event has been corrected before returning the unit to service.

Key Features

• Opens at 195 degrees F to interrupt the burner circuit on overtemperature
• Closes at 165 degrees F for automatic circuit restoration
• Auto-reset operation — no manual reset required after the temperature normalizes
• OEM YORK part, built to match original furnace specifications
• Direct replacement for failed or out-of-spec high-limit switches in applicable YORK equipment

Compatibility

Designed as an OEM-style replacement high-limit switch for YORK residential gas furnace and air handler systems where a 195 degrees F open / 165 degrees F close auto-reset limit device is specified.

Installation Notes

A licensed HVAC technician should perform this replacement. Shut off all power to the furnace at the disconnect and set the thermostat to the off position before beginning work. After installing the new limit switch, verify that airflow restrictions, dirty filters, or blocked registers are corrected to prevent repeat tripping. Refer to applicable local mechanical codes and the unit service manual for mounting orientation and wiring termination requirements.

Technical Specifications

• Open Temperature: 195 degrees F
• Close Temperature: 165 degrees F
• Reset Type: Automatic

Standard Information

• Brand: YORK
• Manufacturer Part Number: s1-02533325000