Dorman 904-618 HVAC Pressure Switch

Reliable HVAC Pressure Switch for Ford, Lincoln, Mazda, and Mercury Vehicles

The Dorman 904-618 HVAC Pressure Switch is designed to maintain optimal air conditioning system performance in select Ford, Lincoln, Mazda, and Mercury models. Engineered for specific fitment, this 12-volt pressure switch ensures accurate monitoring of refrigerant pressure to protect your vehicle's HVAC system.

• Operates at 12 volts with R134a refrigerant compatibility
• Pressure limits: closes at 260 psi and opens at 475 psi
• Maximum pressure rating of 1250 psi for durability
• Metal housing with bolt-on mount type for secure installation
• Black round female connector with two male pin terminals
• Designed specifically for models including Ford F-150, Explorer, Mustang, and Lincoln Town Car

Detailed Product Features and Specifications

The Dorman 904-618 HVAC Pressure Switch is built with a robust metal housing and a bolt-on mount type, ensuring a secure and long-lasting fit. It features a black round connector with two male pin terminals, designed for a specific fit rather than universal application. This switch operates on a 12-volt system and is compatible with R134a refrigerant, commonly used in many Ford, Lincoln, Mazda, and Mercury vehicles. The pressure switch activates by closing at 260 psi and opening at 475 psi, with a maximum pressure tolerance of 1250 psi, providing reliable pressure monitoring to prevent system damage.

Common Applications and Problem Resolution

• Prevents compressor damage due to abnormal refrigerant pressure
• Ensures proper cycling of the A/C compressor clutch
• Helps maintain consistent cabin cooling performance
• Addresses issues with A/C system pressure fluctuations
• Replaces faulty or worn pressure switches in specific Ford, Lincoln, Mazda, and Mercury models

Installation Notes and Tips

Installation of the Dorman 904-618 HVAC Pressure Switch requires a bolt-on mounting approach using the 10 mm thread diameter. Ensure the vehicle’s A/C system is depressurized before removal of the old switch to avoid refrigerant loss or injury. The black female connector with two male pin terminals should be securely connected to maintain proper electrical contact. This part is designed for specific vehicle models, so verify compatibility with your Ford, Lincoln, Mazda, or Mercury vehicle before installation.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 904-618 HVAC Pressure Switch undergoes rigorous quality control to ensure consistent operation within specified pressure limits. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Consult product documentation or your parts provider for exact warranty terms.