York S1-02526366008 Temperature Limit Control 170F 110F

Product Description

The YORK S1-02526366008 is a temperature limit control used in HVAC heating systems to protect the heat exchanger and surrounding components from overheating. The control opens at 170 degrees F and closes at 110 degrees F, cutting power to the burner or blower circuit when the setpoint is exceeded and restoring it once the system cools to the lower threshold. This type of limit switch is a standard safety component in gas furnaces and air handlers, and is typically installed or replaced by a licensed HVAC technician during routine maintenance or after a no-heat service call.

This limit control is suited for residential and light commercial gas furnace applications where a thermal cutout is required to prevent high-temperature equipment damage or unsafe operating conditions. It is a factory replacement part manufactured to YORK specifications, making it a direct-fit option for systems that originally used this component. When a furnace repeatedly trips the limit, technicians should investigate root causes such as restricted airflow, dirty filters, or blocked flues before replacing the control.

Key Features

• Opens at 170 degrees F to interrupt the circuit under overtemperature conditions
• Closes at 110 degrees F to restore operation once the system has cooled
• OEM replacement part built to YORK factory specifications
• Functions as a safety limit switch to protect heat exchangers from thermal damage
• Compatible with standard residential gas furnace control circuits

Compatibility

Designed as an OEM-style replacement temperature limit control for YORK residential gas furnace and heating systems requiring a 170 degrees F open and 110 degrees F close setpoint.

Installation Notes

Installation should be performed by a licensed HVAC technician. Shut off all power to the furnace at the disconnect switch and set the gas valve to the off position before servicing the limit control. The limit switch is typically wired in series with the control circuit, so verify wiring connections match the original configuration before restoring power. Refer to the furnace wiring diagram and applicable local codes during installation.