International Comfort Products 1190623 Limit Switch L155F-40

Product Description

The INTERNATIONAL COMFORT PRODUCTS 1190623 is an OEM replacement limit switch and thermostat designed to protect gas furnaces from overheating. When supply air or heat exchanger temperatures rise beyond the rated setpoint of 155 degrees F, this safety device opens the circuit and shuts down the burner, preventing heat exchanger damage and potential hazards. It resets automatically once temperatures drop by 40 degrees F, resuming normal operation. Licensed HVAC technicians install this switch as a direct OEM replacement, maintaining the original safety calibration and fit without modification.

This limit switch is intended for residential gas furnace applications where high-limit protection is required. It is a genuine OEM component sourced to match original factory specifications. Compatible units include the N80VSL, N80ESN, and G80CTL furnace models, among others. Consult the full model compatibility list to confirm fitment before ordering. This part is commonly replaced during furnace no-heat service calls when the existing limit switch fails to reset or has tripped due to restricted airflow or a dirty filter condition.

Key Features

• Opens circuit at 155 degrees F to shut down burner and prevent heat exchanger damage
• Automatic reset differential of 40 degrees F for restored operation after cooldown
• Genuine OEM replacement part engineered to original factory specifications
• Direct-fit design for N80VSL, N80ESN, G80CTL, and additional compatible furnace models
• Compact form factor fits within standard furnace limit switch mounting locations

Compatibility

Compatible furnace models include the N80VSL, N80ESN, and G80CTL. Additional compatible models may apply; consult the full FITS MODELS list provided by the manufacturer to confirm complete compatibility before installation.

Installation Notes

Installation of this limit switch should be performed by a licensed HVAC technician in accordance with local codes and the furnace manufacturer's service documentation. Shut off power to the furnace at the disconnect or breaker and allow the heat exchanger to cool completely before removing the existing switch. Before returning the unit to service, verify that the root cause of any previous limit trip — such as a clogged filter, blocked return, or failed inducer — has been corrected to prevent repeat failures.

Technical Specifications

• Open Temperature: 155 degrees F
• Reset Differential: 40 degrees F
• Length: 11 inches
• Width: 3.95 inches
• Height: 1.2 inches
• Weight: 0.015 pounds

Standard Information

• Brand: INTERNATIONAL COMFORT PRODUCTS
• Manufacturer Part Number: 1190623