Air Conditioning problem F150

I've got an '99 F150 Extended Cab 4X4 and can't get cold air to blow through the vents like it should.

The system seems to have a full charge and the compressor is running like it should.

Do these trucks have blend door problems? If so, where would the blend door that I'm looking for be located? Any other ideas?

Thanks in advance.

Maybe it just needs a good cleaning,check it out

Maybe it just needs a good cleaning,check it out

I have since found out that the blend door motor actually trys to move the blend doors too far, thus breaking them. However, in my case I just took the motor off and WD40'd it and got it working. I think it was just ceased up from being idle over the winter. Lucky! I have heard changing the blend doors is a REAL CHALLENGE.

Thanks for your response.