Dorman 626-657 HVAC Heater Hose Assembly - Inlet

Durable HVAC Heater Hose Assembly for Ram ProMaster

The Dorman 626-657 HVAC heater hose assembly is designed specifically for Ram ProMaster 1500, 2500, and 3500 models. Constructed from EPDM material, this molded hose assembly ensures reliable performance in your vehicle's heating and cooling system.

• Made from durable EPDM rubber for heat and chemical resistance
• Includes clamps for secure installation
• Molded assembly with three hose ends featuring quick disconnects
• Compatible with Ram ProMaster 1500, 2500, and 3500
• Maximum working pressure of 100 PSI
• Centerline length of 12 inches for precise fitment
• Black color for standard OEM appearance

Technical Details and Specifications

This Dorman HVAC heater hose assembly (part number 626-657) features a molded design with three hose ends. End 1 has an inside diameter of 1.366 inches and attaches via hose connection, while ends 2 and 3 have 1.94-inch inside diameters with quick disconnect fittings. The hose ends measure 1.67 inches (end 1) and 2.18 inches (ends 2 and 3) in outside diameter. The assembly is constructed from EPDM, a material known for its resistance to heat, ozone, and coolant chemicals, making it suitable for HVAC applications in Ram ProMaster vans. The hose assembly does not include a protective sleeve or coolant hose heat shield and is rated for regular grade use with a maximum working pressure of 100 PSI.

Applications and Common Issues Addressed

• Replacement of worn or cracked heater hoses in Ram ProMaster 1500, 2500, and 3500
• Resolving coolant leaks affecting HVAC heater core performance
• Fixing poor heater output due to damaged or clogged heater hoses
• Addressing hose failures caused by heat and pressure exposure
• Upgrading OEM hoses with a reliable molded assembly for consistent fit

Installation Notes and Tips

When installing the Dorman 626-657 heater hose assembly, ensure the vehicle is cool and the cooling system is depressurized. Use the included clamps to secure hose ends properly, especially at quick disconnect fittings on ends 2 and 3. Verify hose routing matches OEM specifications to avoid kinks or interference. Inspect surrounding components for wear or damage during installation. This assembly is designed for direct replacement on Ram ProMaster 1500, 2500, and 3500 models, simplifying the installation process.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 626-657 heater hose assembly undergoes rigorous quality control to ensure durability and performance in HVAC systems. 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.