Dorman 904-626 HVAC Pressure Switch

Dorman 904-626 HVAC Pressure Switch

Restore A/C system control with this Dorman HVAC pressure switch, part number 904-626. It is a direct replacement A/C transducer switch for vehicles with R134A refrigerant and is built to address failed terminals or a damaged connector on the original unit.

Compatible with 2003-2006 Ford Expedition, 2003-2006 Lincoln Navigator, and 2003-2005 Lincoln Aviator, this specific-fit switch helps bring back proper pressure signal operation in the air conditioning system.

Key Features

• Direct replacement HVAC pressure switch for A/C system service
• Specific fit for listed Ford and Lincoln applications
• Designed for 12-volt systems using R134A refrigerant
• Pressure limits: closes at 260 and opens at 475
• Metal housing with black round connector
• 2-pin female connector with male terminals
• Bolt-on mount with 10 mm thread diameter
• Maximum pressure reading: 1250 PSI
• Part number 904-626 for easy identification

Detailed Description

Dorman 904-626 is an HVAC pressure switch made to replace a failed A/C transducer switch on select Ford Expedition, Lincoln Navigator, and Lincoln Aviator models. It is a specific-fit component with a round black connector, metal housing, and 2-pin electrical interface. The switch is intended for R134A refrigerant systems and uses a bolt-on mounting style with a 10 mm thread diameter. If the original switch has corroded terminals or a broken connector, this replacement helps restore the pressure signal needed for normal air conditioning operation. This part cross-references Baldwin 20053 for the same application.

Common Issues This Part May Address

• Air conditioning stops cycling or responding correctly
• Corroded pressure switch terminals
• Broken or damaged original connector
• Faulty A/C pressure signal at the HVAC control circuit
• Loss of cooling performance tied to switch failure

Installation Notes and Tips

Verify the vehicle uses an R134A system and confirm connector style, thread diameter, and mounting style before installation. Inspect the surrounding harness and terminals for corrosion or damage so the new switch can make a clean electrical connection. This part is listed for 2003-2006 Ford Expedition, 2003-2006 Lincoln Navigator, and 2003-2005 Lincoln Aviator, so match the vehicle year and application before ordering Dorman 904-626.

Quality Assurance

Dorman replacement parts are built as direct-fit service components for specific vehicle applications. This HVAC pressure switch is engineered to match the listed fitment and restore proper A/C pressure switch function on the covered Ford and Lincoln models.