Dorman 904-612 HVAC Pressure Switch

Reliable HVAC Pressure Switch for Ford and Lincoln Vehicles

The Dorman 904-612 HVAC Pressure Switch is engineered to maintain optimal air conditioning system performance in select Ford and Lincoln models. Designed specifically for R134a refrigerant systems, this pressure switch ensures accurate pressure monitoring and system protection.

• Operates at 5 volts for consistent electrical performance
• Compatible with R134a refrigerant type
• Pressure limits: closes at 260 psi and opens at 475 psi
• Maximum pressure rating of 500 psi for durability
• Rectangular black female connector with three male pin terminals
• Metal housing for enhanced strength and heat resistance
• Bolt mount type with 10 mm thread diameter for secure installation
• Specific fit for various Ford and Lincoln models including F-150, Explorer, Mustang, and Navigator

Detailed Product Description

The Dorman 904-612 HVAC Pressure Switch is a critical component designed to monitor refrigerant pressure within the air conditioning system. It operates at a 5-volt electrical rating and is calibrated to work with R134a refrigerant, commonly used in many Ford and Lincoln vehicles. The switch activates by closing at 260 psi and opens at 475 psi, providing reliable pressure regulation to protect the A/C compressor and other system components from damage due to abnormal pressure levels. Its metal housing offers durability and resistance to heat, while the black rectangular female connector with three male pin terminals ensures a secure and precise electrical connection. The bolt mount design with a 10 mm thread diameter allows for straightforward installation in compatible vehicles.

Compatible Vehicles and Applications

This HVAC pressure switch is specifically designed for use in a range of Ford and Lincoln models, including but not limited to the Ford F-150, Explorer, Mustang, Bronco, Edge, Escape, Transit series, and Lincoln Navigator, Continental, and Aviator. The part number 904-612 matches OEM specifications, ensuring proper fit and function in these vehicles.

Common Issues Addressed by the HVAC Pressure Switch

• Prevents compressor damage caused by excessively high or low refrigerant pressure
• Helps maintain consistent air conditioning system performance
• Protects against system shutdowns due to pressure irregularities
• Reduces risk of refrigerant leaks by monitoring pressure thresholds
• Ensures proper cycling of the A/C compressor for efficient cooling

Installation Notes and Tips

Installation of the Dorman 904-612 HVAC Pressure Switch requires basic mechanical skills and appropriate tools. The bolt mount with a 10 mm thread diameter allows for secure attachment to the A/C system. Ensure the vehicle’s air conditioning system is depressurized before removal of the old switch to avoid refrigerant release. Verify electrical connections match the black rectangular female connector with three male pin terminals. It is recommended to inspect the surrounding components for wear or damage during installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 904-612 HVAC Pressure Switch undergoes rigorous quality control testing to ensure proper operation under specified pressure and voltage conditions. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.