Replace a cracked or broken heater blend door with the Dorman - OE Solutions HVAC Heater Blend Door, part number 902-309, a direct-fit replacement for the 2002-2009 Dodge Ram 1500, 2003-2009 Dodge Ram 2500 and 2003-2009 Dodge Ram 3500. It is sold as a blend door repair kit and is designed to take the place of a factory door that has failed, so the HVAC system has a working door to mix heated and unheated air.
Inside the HVAC case, the blend door moves to send incoming air through or around the heater core. Its position sets the temperature of the air coming out of the vents. When the original door breaks, the cab may be stuck at one temperature no matter where the control is set. If a failed door is the cause, this 2002-2009 Dodge Ram 1500 heater blend door, which also fits the 2003-2009 Dodge Ram 2500 and 2003-2009 Dodge Ram 3500, replaces it.
- Direct replacement: Built to line up with the original door's fit and operation on the listed applications.
- Repair for a failed original: Intended to take the place of a factory door that has cracked or broken from vibration or fatigue.
- Durable construction: Made from quality materials, with dependable performance and durability in mind.
- Backed by experience: Supported by Dorman's team of product experts in the United States and more than a century in the automotive business.
See the "Vehicles it fits" section for complete fitment details.
Interchange: 5073984AA · 5073985AA · 5073992AA · 5189147AA · 5189148AA · DA1377
This part cross-references / interchanges with the following part numbers:
5073984AA, 5073985AA, 5073992AA, 5189147AA, 5189148AA, DA1377
Frequently Asked Questions
Does this heater blend door fit the 2003-2009 Dodge Ram 2500 and 2003-2009 Dodge Ram 3500?
Yes. It is listed for both trucks. Check the "Vehicles it fits" section to confirm it matches your truck.
Will it replace the heater blend door in a 2002-2009 Dodge Ram 1500?
Yes. The 902-309 is listed for the 2002-2009 Dodge Ram 1500, including the 2005 model year.
What does a heater blend door do?
It sits inside the HVAC case and moves to route air through or around the heater core. Its position sets the temperature of the air that comes out of the vents.
What are signs the blend door may need replacing?
Signs include vent air stuck hot or cold, a temperature that doesn't follow the control, or clicking behind the dash. Other HVAC parts can cause these symptoms too, so diagnose the cause before you replace the door.
How is the 902-309 blend door installed?
It replaces the original door inside the HVAC case. Follow the vehicle service information for the access, removal and installation steps.
