Whenever I turn my heater fan on, a fine gritty dust flies out of the vents. I'm thinking that the cabin air filter has deteriated and fine particles are blown through the venting system and out into the cab. Most of it seems to end up on my dash and it's hard to keep it clean, not to mention breathing this stuff in. Is there a cabin air filter in the truck that can be easily changed? Any help would be appreciated

John

BTW, it's a 1999 Dodge Ram Sport model

 

No filter

 

I HAVE A QUESTION TO THIS.....

WHERE DOES THE FUNKY (MILDEWY[sm=WTFsgign.gif][sm=WTFsgign.gif]?) SMELL COME FROM WHEN THE A/C IS ON?

 

Probably dirt and grime buildup in the A/C box which is holding the moisture that hasn't all drained out.

 

is there a remedy 4 that?

also, when the a/c has been off for a while, i hear it gurgling..is that the same symptom.


thanks 4 your input

 

No replaceable cabin filter. Some models have a permenant foam and grid filter at the intake behind the glove box. It may be deteriorated or the dirt is getting in from the outside through the cowl.
Musty smells eminate from the evaporator coil as dust builds up on it and is held there by condensation. This in turn collects mold/mildew and hence the odor. If you pull the blower down and use a pump-up tank sprayer with a/c coil cleaner, you can reasonably get up in there and sanitize the evap. coil. It may take a few treatments and thereafter should be done a couple of times per year. You can also place an air freshener in the glove box to help the odor situation. However, this simply masks the problem; the mold grows on.
WC

 

the stealership has a spray that will kill the mold, and stop the smell

 

You can buy that stuff at any place that sells A/C maintenance material, or even your local home improvement store.