AC used for the first time since purchasing the truck last Oct. I notice and passengers in truck with me as well notice that the AC is not strong at all and it fluctuates from cold to warm with a heavy damp smell almost like its letting fresh air in mixing with the cold AC. It seems to be doing this more so when driving but will also do it at at idle after driving. Of course dealership states perfect temp blowing @34 and Freon at perfect levels. Max AC will not blow you out of the truck and reg ac at lowest setting feels like its on a vent setting. When AC first comes out it smells very damp mildew smell. Just looking for some answers because this is going to be a back and forth thing with the dealership. Of course the day I go it was 54 out and I'm waiting for a hotter day. Maybe the AC suxs in general with the F-150???? First owner of one, thanks

 

I bought my 2013 F150 ecoboost in October also haven't used the AC yet, been reading quite a few posts about the smell though. I will keep ya posted so not much help at this time.

 

Your symptoms are not normal. The mildew smell may be mold on the evaporator or in the plenum. The things you can do is check that you have good airflow through the condensor at the radiator.
Even though this is the first time you used the A/C it has been running already. Everytime the defroster or mix is selected in heating modes, the compressor cycles to dry the air hitting the glass.
You should. Probably take it to the dealer and get after them if they give you a hard time. The mildew thing shouldn't happen. After all, you're breathing that stuff.
Mine is a 2013 model and the A/C works just fine.

 

Thanks! Been reading about the smells as well but not to the extreme some people have been talking about