I have 36K miles. While driving to Houston from West Texas the a/c began to blow warm air. We had stopped for three hours then started driving again. Within twenty minutes the a/c began to blow warm air. I checked the fuses under the hood but see none that are a/c related. Is there an a/c fuse located somewhere else? Could this be a common problem?
2008 Dodge Ram 1500 - Hemi

Yes, you want to test all under hood and under dash fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-t...tml#post252145

This link may help:

https://www.askmehelpdesk.com/cars-t...ml#post1864159