I hope I'm posting in the right area. I don't see a spot for A/C issues.
When I start my truck up and start to get going it sounds like there is water sloshing around in my dash. I think it may have something to do with the A/C but am not sure. When I turn on the A/C the air coming out smells kind of musty at first, and sometimes the air will stop blowing cold. I shut off the A/C for a bit, turn it back on and its cold again, for a bit.