This past week while running the A/C, there was a stale smell like dirty socks. I first checked when I had changed the cabin filters and it was only 5 months ago. After doing some research, I went to AutoZone and bought a anti-fungal spray that gets spayed in the outside A/C vent. Along with changing the cabin filters ,the spray seems to have worked. The spray kills mold and fungus that accumulates in the system. It almost smells like Fabreeze. One cabin filter was very clean, and the other really dirty and dark gray.

Where did you spray in from outside?

This past week while running the A/C, there was a stale smell like dirty socks. I first checked when I had changed the cabin filters and it was only 5 months ago. After doing some research, I went to AutoZone and bought a anti-fungal spray that gets spayed in the outside A/C vent. Along with changing the cabin filters ,the spray seems to have worked. The spray kills mold and fungus that accumulates in the system. It almost smells like Fabreeze. One cabin filter was very clean, and the other really dirty and dark gray.

Mine smelled like an old swamp cooler. What year did they quit putting the in cab filters in the trucks, I don't think the newer ones have a filter in them.

Using the search tool will mention 2002 was the last year.

Brian

This past week while running the A/C, there was a stale smell like dirty socks. I first checked when I had changed the cabin filters and it was only 5 months ago. After doing some research, I went to AutoZone and bought a anti-fungal spray that gets spayed in the outside A/C vent. Along with changing the cabin filters ,the spray seems to have worked. The spray kills mold and fungus that accumulates in the system. It almost smells like Fabreeze. One cabin filter was very clean, and the other really dirty and dark gray.


I'd like to know where you sprayed the stuff to. Where is the outside vent for the A/C located?

Spray into the vents under the wipers from the outside. Have you ac on and in the outside air position when you do it. After you spray it, turn it to recirc and let it run for an hour or so on manual high. Another was is rent or have a mold place come and put an ozone generator in your cab for a couple of hours with the fan on high in AC and on recirc.

I stood on the passenger tire and could see the vent under the passenger side wiper. The instructions said to run the A/C on high with the outside air position on for 5-10 minutes and keep the windows down while doing it. The can also said to turn off the A/C and spay a little down each vent and then run it. I didn't spay down the vents. Changing filters at this time is a must. 02 was the last year for cabin filters. I'm suprised at how much junk is in these filters including small leaves and pine needles.

Another EASY way to keep your a/c from getting funky is to ensure that it blows without the A/C on for about 2 mins prior to shutting it down. You'll still have cool air, but it will dry out the coils, etc. before you put it away.

Another EASY way to keep your a/c from getting funky is to ensure that it blows without the A/C on for about 2 mins prior to shutting it down. You'll still have cool air, but it will dry out the coils, etc. before you put it away.
Thats what I was told, but also put the system on outside air. This drys out coils, and lets air inside "box" where coil is so moisture doesn't stay on coils. After I sprayed coil cleaner, a few years ago, I have not had problem again.

x2,
in super humid west mi, I turn the ac off about 2 blocks from my house and leave the fan on at high to dry out the coils.
I wish we were given a way open and clean it.
fyi the same happens to a home ac coil.

I was on vacation, so didn't get to add that I had to put a new Heat Pump on my house (4 years old) yes thats the house and Heat Pump. The original HVAC contractor nor the builder ever registered the system upon install. So, $9,000.00 later and after one heating season, one cooling, I developed the smelly gym sock smell in my house. It happens during defrost mode. The product BioCide works for a while, then comes back. Apparently the smell comes from the pan rather the coils. So now I am researching Food Grade Hydrogen Peroxide(35%) to see if that could solve my problem. Guests wonder why I jump up out of my chair and run to air return to spray air freshener in it to cover smell.
OK, long winded and off topic a bit, but BioCide is the product I used on my truck, you can buy it at a HVAC supply store. If you use this product make sure your truck doesn't have a cabin filter, if it does, take it out before spraying.

Be carefull with the Hydrogen Peroxide at 35%. I've seen it catch things on fire easily. At work we kept it in 55 gallons drums and the field crew was checking the level using a wooden broom handle. When the electric heater turned on, the vapors coming off the wood handle caught fire and burned down the shed. We got rid of the peroxide at all sites and replaced it with Sodium Hypochlorite.

hydrogen peroxide at 35%, wow,
how about using UV light, they sell em as a kit now, for the humidifiers etc,
if you are creative, you can get a UV bulb and drill a hole and voala.

I don't want to highjack this thread, but yes 35% is also known as food grade hydrogen peroxide. Great in the laundry for whites. I looked into the UV lights but was told I need 3 @$500 apiece. I never had this problem with old system, and this just tops the cake and totally pisses me off being in a 4 year old house!

Durabeast, ouch $500 for each uv light, you can get a pond UV bulb for couple of bucks and switch it somesort of airflow/pressure switch....