Defrost Problems 2010 Dodge Ram Half Ton

esj109 · Nov 22, 2016

2010 Dodge Ram 1/2 ton. First, I'm new to the forum and I apologize if this topic has been beaten like a dead horse already; I've searched and can't find my problem. As the weather changes to winter in MN, I just noticed that my defrost vents don't blow air. My dash and floor vents work fine when selected. When I turn the knob to defrost/floor, air just blows from the dash and floor. When I turn the knob to full defrost, air just blows from the dash. I don't hear any loud knocking when the truck is first started as described in other posts. I can get the air to blow from the defrost vents if I turn the fan to full blast while my selector knob is on dash and then quickly turn the knob to defrost. I do hear, and have heard for some time some subtle knocking / noises when I turn my truck off; I'm not sure if this noise is related to my problem or not. Any thoughts??

RamCares · Nov 23, 2016

esj109 said:
2010 Dodge Ram 1/2 ton. First, I'm new to the forum and I apologize if this topic has been beaten like a dead horse already; I've searched and can't find my problem. As the weather changes to winter in MN, I just noticed that my defrost vents don't blow air. My dash and floor vents work fine when selected. When I turn the knob to defrost/floor, air just blows from the dash and floor. When I turn the knob to full defrost, air just blows from the dash. I don't hear any loud knocking when the truck is first started as described in other posts. I can get the air to blow from the defrost vents if I turn the fan to full blast while my selector knob is on dash and then quickly turn the knob to defrost. I do hear, and have heard for some time some subtle knocking / noises when I turn my truck off; I'm not sure if this noise is related to my problem or not. Any thoughts??

Hi esj109,

Sorry to hear about this! If you decide to visit your local dealership I'd be happy to follow up with them for you if needed. Just PM our page and let me know.

Andrea
Ram Social Care Specialist

adurm · Nov 23, 2016

Blend door stuck? If so, I believe you have to remove a great deal of the dash to replace the motor. At least in an 03. Just a guess though.

esj109 · Nov 26, 2016

Visited an out-of-town dealership yesterday while on vacation and they guessed it was a (I think they said) head module? Basically the computer part that controls everything when the dash switches are actuated. If it is that, the repair bill isn't too nuts...around $300. I plan on getting a second opinion from a local dealership if no one hear has any more words of wisdom.

esj109 · Dec 21, 2016

Just visited my local dealership where the truck was purchased. They gave the problem a quick once-over and think it is stuck / broken mode doors. They said they would have to do some more internal diagnostics to determine if that is what the problem is. The fix estimate was around $1600. The service manager said that if it was his truck, he would just be happy it still had heat and wouldn't fix the problem. Unfortunately it is a little tough to drive without defrosters in MN in the winter!!

Defrost Problems 2010 Dodge Ram Half Ton

esj109

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