What;s Wrong With My RAM Truck????
Our 2005 Ram 3500 Diesel (5.9) SRW has been a great tow vehicle for our 7-ton 5th wheel trailer. And after 150 thousand miles, three years ago we had to replace a couple of leaky hoses in our air con...
Forum Discussion
ScottG wrote:
Sounds like low freon level is causing the evaporator coil to freeze up.
It will be worse when humidity is high or eng speed is low.
Highly unlikely. Low freon level would result in poor performance. The system blows cold. Therefore, the freon level is perfect, or close to it.
You may be on to something with the icing of the evaporator idea though. The system should have some sort of switch (probably a low pressure or temp) that cuts the compressor off to prevent this.
In my mind this is the most likely cause. The OP can test his theory out without any tools or even lifting the hood. When it happens, simply turn the AC of for a few mimutes. If it is iceing, then it will melt, then work perfectly when it is turned back on, until it ices up again.
I am not sure if this is a orfice tube or expansion valve system.
If it is an expansion valve system, then that may be acting up.
This is a more involved fix though.
I would look for a compressor cutout switch. They are cheap at 15.00 or so, and easy (5 min) to install.
