My air was blowing real cold yesterday. I just had it recharged and replaced the relay fuse. Today I start to my car to let it get cool and by the time I get back to it nothing is coming out of the vents. Nothing is blowing! U can hear a sound coming from under the hood like its working but no air blows out hot or cold. Any ideas on what the problem is? I recently took the dash apart to change my gauges could something have come loose there. Any suggestions would be appreciated!