Odor from HVAC vents on Dodge Ram 1500

Some vehicles may develop a musty odor coming from the HVAC system, Dodge has issued a cleaner/disinfectant and a coating for the evaporator designed to inhibit bacterial growth.

RepairPal Verified
Average mileage: 96,696 (16,500–253,000)
12 model years affected: 1994, 1995, 1997, 2002, more2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
56 people reported this problem
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
Viewing 1 - 20 of 27 problem details
2005 Dodge Ram 1500 130,000 mi,
the a/c smells a little musty
2010 Dodge Ram 1500 74,000 mi,
musty dirty smell coming from ac vents
2010 Dodge Ram 1500 92,000 mi,
Sudden issue with strong mold mildew smell blowing from A/C vents on every start up. Smell is string on start up and then lessens some as you drive.
2004 Dodge Ram 1500 76,000 mi,
Using the A/C with fresh air produces a musty smell of the air entering the cabin from the HVAC system. I looked in the manual if there was an air filter for the cabin to change with no avail. After returning from an overseas military assignment where the truck was in storage for 3 years, took it for service and asked the dealership to troubleshoot and solve the problem. There was no filter to change/replace so the service department flushed the fresh air intake (at the base of the windshield with a pressure washer/cleaner) and also ensured there was no clog for the A/C drain. Now the fresh air and A/C does not have the musty smell.
2007 Dodge Ram 1500 66,000 mi,
2010 Dodge Ram 1500 72,000 mi,
musty smell after the truck has run and then shut off and restarted. the smell last until the heat gets hot.
Bad mold smell weather AC is on or not. Have tried various mold killer products to no avail. It's most likely growing on the evaporator. Still can't get rid of it.
1995 Dodge Ram 1500 80,000 mi,
I tried spraying Lysol into the fresh air intake with fan going on high ,no help tried 50% water and Clorox neither helped at all . And since to get to the problem you had to remove the AC freon drain the antifreeze to get the heater and AC core out I thought of using my leaf blower . The one air vent that put out the most air on driver side by door I taped the two on right ,pluged the heater outlets . I took off the trim around the instruments and plugged the one in the center . With the grill off the far left I got a three inch flex hose hooked up to my leaf blower I had to hold it there no way to connect it and ran leaf blower for about 10 minutes . It must have had a bunch of stuff on there and it blew it off probably still in there but at least not on the AC evaporator coil . I saw where nothing cam out but at least the smell seems to be gone for now.
2004 Dodge Ram 1500 55,000 mi,
No repair. My local dealer has no idea how to fix it.
2006 Dodge Ram 1500 35,000 mi,
Had musty odor;delt with it thinking pet or other dirt issue. Then found leak in roof seal going down rear window; fixed leak after 3 trys and carpet replaced; But, never have gotten rid of musty odor
2006 Dodge Ram 1500 85,000 mi,
heater blower replaced but odor contiued
2008 Dodge Ram 1500 88,500 mi,
Moldy smell in vehicle when I first get in the truck. Smell seems to go away in a few minutes but possibly just because I get used to it.
2004 Dodge Ram 1500 190,000 mi,
The heat smells bad for a few minutes then goes back to normal
2010 Dodge Ram 1500 70,000 mi,
Start the vehicle and turn on the fan blower. Get musty smell of the air entering the cabin for about one minute. Installed a cabin air filter, but it did not help.
2004 Dodge Ram 1500 111,034 mi,
Smells when heater is on
2002 Dodge Ram 1500 100,000 mi,
Cabin air smells terrible at startup.
2010 Dodge Ram 1500 98,250 mi,
Bad smell in ac vent
2008 Dodge Ram 1500 105,000 mi,
Smells musty when air is turned on, I've only put the air freshener in the vents
1995 Dodge Ram 1500 100,000 mi,
It has smelled like this for years . My wife says she don't want to ride in it now smells so bad . To get to the evaporator core where the problem is . You practicly have to dismantle the cab you got one bolt behind the brain box,the toe side panels there is a bolt they also have the door step threshold needs to come off . the panell below the steering wheel needs to come off to loosen the steering wheel. I just have not done it yet. I shrayed 50-50 clorox & water in there wiyh fan running on high . It smelled better at first but next day it smelled the same .
1995 Dodge Ram 1500 99,950 mi,
Musty mold smell from the AC vents how do I fix it It has had this smell for years it is getting worse as time goes on .How do I get to the air intake I think under the hood .