Gates 23840 HVAC Defrost and Heater Air Duct Hose

Gates 23840 Defroster/Air Intake Hose

The Gates 23840 Defroster/Air Intake Hose is a 2.5 in. inside diameter hose built for low-pressure, low-suction routing in HVAC and under-hood systems. It is sized for defroster ducts, air intake paths, and related heater-air duct applications, with marine-approved use noted by the manufacturer.

Key Features

• 2.5 in. inside diameter, also listed as 64 mm
• 6 ft. centerline length, also listed as 72 in., 1.83 m, and 1829 mm
• Designed for defrosters, air ducts, air intakes, and under-hood routing
• Built for low-pressure, low-suction service
• Approved for marine applications
• Gates part number 23840 for direct catalog identification

Product Details

This Gates defroster and air intake hose is a practical replacement for HVAC ducting where a flexible hose is needed to move air through a controlled path. The 2.5-inch diameter and 6-foot centerline length make it suitable for routing between components in heating, ventilation, and defrost systems, as well as other low-vacuum or low-suction locations. Gates 23840 is also referenced across multiple aftermarket catalogs, including Dayco 80170 and Wix 33755, for the same application.

Compatible vehicle applications include 1981-1987 Chevrolet Chevette, 1983 Mitsubishi Mighty Max, 1981-1982 Dodge Challenger, 1980-1981 Dodge D150, 1981 Dodge D250, 1981 Dodge D350, 1980-1981 Dodge D50, 1980-1981 Dodge W150, 1981 Dodge W250, 1981 Dodge W350, 1981 Nissan 720, 1980 Dodge D100, 1980 Dodge D200, 1980 Dodge D300, 1980 Dodge W200, 1980 Dodge W300, and 1980 Rover 3500. For buyers searching for a Gates 23840 hose for Chevrolet Chevette or Dodge D150 HVAC routing, this part matches the listed defroster/air intake hose application.

Common Uses

• Replacing a cracked or collapsed defroster duct hose
• Restoring airflow through heater and defrost routing
• Repairing air intake hose sections in low-suction systems
• Addressing restricted airflow caused by damaged HVAC ducting
• Replacing hose in under-hood air routing where flexibility is required

Installation Notes and Tips

Verify the inside diameter and centerline length before installation to confirm routing clearance and fit. Measure the existing hose path on the vehicle and compare it to the 72-inch centerline length, especially on older Chevrolet Chevette, Dodge, and Nissan applications where routing can vary by trim or HVAC layout. Inspect adjoining ducts, clamps, and connection points for wear before installing the new hose.

Quality Assurance

Gates supplies this hose for defroster, air duct, air intake, and other low-pressure applications, with marine approval noted by the manufacturer. The part is identified as Gates 23840 and is cross-referenced in other catalogs for the same application.