York 025-29041-005 Limit Switch 140F Open 110F Close

Product Description

The YORK 025-29041-005 is a high-limit safety switch designed to protect gas furnace heat exchangers from overheating. It opens the control circuit at 140 degrees F and resets automatically when the temperature drops to 110 degrees F. This type of limit switch is a direct safety device in the furnace control circuit, interrupting burner operation when airflow is insufficient or temperatures exceed safe thresholds. Licensed HVAC technicians install this component as part of routine furnace service or as a direct OEM-style replacement when the existing switch has failed or is reading out of calibration.

This limit switch is suited for residential gas furnace applications where the heat exchanger or plenum temperature must be monitored and controlled. It mounts in the furnace cabinet near the heat exchanger or supply plenum and is wired into the low-voltage or line-voltage control circuit depending on furnace design. It is a common service replacement in forced-air heating systems where overtemperature faults are causing nuisance shutdowns or where the original limit switch has tested open at ambient temperature.

Key Features

• Opens at 140 degrees F to interrupt burner operation and prevent heat exchanger damage
• Closes at 110 degrees F for automatic reset when safe temperatures are restored
• OEM part number 025-29041-005 ensures direct factory-specification fitment
• Designed for gas furnace safety control circuits
• Compact limit switch form factor for standard furnace cabinet mounting

Compatibility

Designed as an OEM-style replacement limit switch for YORK residential gas furnace systems. Confirm specific model compatibility using the OEM documentation for your unit before installation.

Installation Notes

Limit switch replacement should be performed by a licensed HVAC technician. Before servicing, shut down the furnace completely and disconnect electrical power at the disconnect or breaker. Verify the replacement switch orientation and terminal connections match the original before energizing the system. After installation, cycle the furnace and confirm normal high-limit operation using a calibrated thermometer or HVAC service analyzer.

Technical Specifications

• Open Temperature: 140 degrees F
• Close Temperature: 110 degrees F
• Switch Type: High-Limit Safety Switch

Standard Information

• Brand: YORK
• Manufacturer Part Number: 025-29041-005