We are now around northern Arizona and southern Utah region and will be here for a few more days. Noticed that much less cold air is coming out of the vents, air is still cold just not nearly as much volume. With the outside temp around 95 today, the cab is getting too warm. Most of the time, when I first start the drive, it blows strong, then gradually or suddenly (don't know) there is only maybe 20% air volume coming out. Could it be something simple? Thx. Erwin

 

Could your vents below the windshield wipers be full of leaves?

 

Will check it now. Also, when it's acting up, the sound of the motor is about the same, only with less air coming out.

 

Sounds like it's being blocked. I know it's not the same, but I've been driving around at work lately in a 97' Chevy and hardly any air was coming out of the vents, but the blower was working fine. I pulled the fan from under the dash and inside by the condenser was completely full of sticks and leaves and some mud. After cleaning it, the a/c is blowing great now. I have thought about pulling my fan in the superduty after seeing the amount of junk blocking the work trucks condenser.

 

Looks clean without taking off the whole cover thing. Will try to take it apart to see. Looks like 4 screws by the windshield and 2 plastic fasteners under the hood on each side. Then take the wiper arms out.

 

Sounds like the blend door is acting up, if iy were leaves or debree it will always be slow air coming in.

 

Took off the cover between the windshield and hood. Passenger half is closed by body panels withe a 3 inch access hole. I'm not sure I want to break that on the road since I don't have anything to close it except duck tape. Don't know what to do at this point.

 

Need to go take the kids to snow canyon now. Will dig into it later.

 

Sounds like an evaporator coil that's icing up. Next time you notice it, shut the A/C off, leaving the fan on and see if airflow returns to normal. If it does, it's ice. If you're parked, you should see more water than normal come from the condensate drain.

 

You are spot on. It freezes up every half hour to an hour. Once home I'll dig down to the bottom of it. Thanks. Erwin

 

Just noticed slow water dripping above the passager side floor. Maybe the draining hole or whatever is there got clogged.

 

Let us know what you find when it's fixed.