Have seen other problems with AC, but seems like this one isn't common. Need to figure out a direction to go next.

 

You may need to take the fan out and see if a mouse built a nest in the cage. I've seen it before, but usually on a truck that spends alot of time parked.

 

DATC?

 

Dual Automatic Temperature Control
It's the control unit that sits below the radio.

Have recently replaced the belts, tensioner, and idler pulleys, and haven't seen any creature nests. Even sprayed out the fins on the radiator.

 

My work truck did this and it had sucked a plastic bag up from the floor and was blocking flow . It would try to change but couldn't complete the cycle . You could hear it blowing hard behind the dash .

 

I ran an inspection camera through the vents and found no obstructions .

I read that the evaporator is likely a cause in dusty areas. I bought the truck from Tennessee and there was alot of fine tan dirt in the air filter and all over the truck. So I'm assuming it would probably be beneficial to clean out the evaporator.

Here's the problem, I can't find any good instructors on how to get to it and open it up. Any help would be appreciated.

 

did you ever figure out this issue? My AC seems to be in the same situation not blowing very hard. Just wondering if you ever fixed it and what you determined the cause to be. thanks.

 

Hopefully you have fixed the problem. I haven't been on in a while. For others looking for the resolve. My evaporator was dirty.

I removed the glove box and behind it is a large black box. To save myself the trouble, I cut about a 3"x3" square in it with a razor knife. I used a/c condenser cleaner (from home depot for home a/c units). I sprayed that inside and let it sit for a couple minutes. then with a spray bottle of water rinsed it all out. Make sure it drains out of the drain tube that sits behind the air filter box. If not, stick something in there to unclog it. I cut out a piece of aluminum to cover the whole, ran a bead of silicone around it, a screwed it on. Has held up for over a year with no problems.

 

I used a/c condenser cleaner (from home depot for home a/c units).

As an AC technician I STRONGLY advise to never use foaming A/C condensor cleaner you buy from an auto parts store or H0m0 Depot! Most contain a sodium based chemical that over time, slowly dissolves the aluminum fins & solder. Soapy water in a spray bottle with compressed air from an air chuck wand will do the trick.
I just cleaned my evap. coil in my truck & have twice the air flow... like a new truck!

 

Where did you cut the hole in the middle of to the right or left side?

 

The last post was over 6 years ago and original thread is from 2012 please start a new topic if you need help.