My 06 does the same thing. A while back it wouldnt blow at all even though the fan was running, i found some sort of door that seems like it had broken off in there and was blocking the air intake preventing the fan from circulating air so I had to prop it up. But since I have owned it the passenger side doesnt blow very cold.my a/c blows cold out the driver vents but warm out the passenger side? anybody able to help???