Dorman 626-603 HVAC Heater Hose Assembly - Inlet

Durable HVAC Heater Hose Assembly for Chrysler, Dodge, Jeep, and Ram

The Dorman 626-603 HVAC heater hose assembly is engineered to provide reliable coolant flow in your vehicle's heating system. Designed specifically for select Chrysler, Dodge, Jeep, and Ram models, this molded steel hose assembly ensures consistent performance under normal operating conditions.

• Constructed from durable steel with a black coated finish for corrosion resistance
• Molded assembly with a centerline length of 7.5 inches for precise fitment
• End 1 inside diameter: 0.532 inches; End 2 inside diameter: 0.58 inches
• Designed for single inside diameter coolant hose applications
• Maximum working pressure rated at 100 psi
• Compatible with hose attachment types on both ends
• Does not include clamps or protective sleeves

Product Details and Specifications

The Dorman 626-603 heater hose assembly is a molded steel component designed to replace the original HVAC heater hose in vehicles such as the Chrysler Aspen, Dodge Durango, Jeep Grand Wagoneer, and Ram 1500, 2500, and 3500 models. Its black coated steel construction offers resistance to corrosion and wear, maintaining coolant flow integrity within the heating system. The hose features a single inside diameter design with precise measurements of 0.532 inches on one end and 0.58 inches on the other, ensuring compatibility with factory hose connections. With a centerline length of 7.5 inches, this assembly fits the specified vehicle models without modification. The hose is rated for a maximum working pressure of 100 psi, suitable for standard HVAC system requirements. Note that this assembly does not include clamps or heat shields and is not thermostatically controlled.

Common Applications and Problem Resolution

• Replacement of cracked or leaking heater hoses in Chrysler, Dodge, Jeep, and Ram vehicles
• Restoring proper coolant flow to the HVAC heater core
• Resolving heater core overheating or insufficient cabin heat issues
• Addressing coolant leaks that cause engine overheating or loss of coolant
• Maintaining system pressure integrity within the HVAC heating circuit

Installation Notes and Tips

When installing the Dorman 626-603 heater hose assembly, ensure the vehicle is cool and the cooling system is depressurized. Verify hose end diameters match the factory hose connections for a secure fit. Since clamps are not included, reuse existing clamps if in good condition or replace with appropriate OEM clamps. Inspect surrounding components for wear or damage during installation. Proper routing of the molded hose assembly is critical to avoid kinks or interference with other engine parts.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The 626-603 heater hose assembly undergoes quality checks to ensure durability and performance in HVAC applications. While specific warranty details are not provided here, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.