Weird dash light issue

My wife was driving to work this morning when the dash lights became possesed and started flashing, and the needles for the gauges started bouncing as well. The van ran fine, just the electrical gremlins. I drove it home, and noticed it happening again, but it seems to stop whenever I turned the A/C fan on. As soon as I turned the fan off, the gremlins came right back. I do not know if the headlights were flashing as well. Any ideas?
Thanks in advance.

Check the connection on the climate control panel. You may have a melted connector. If so, replace it if it's bad enough otherwise, clean the contacts with contact cleaner.

Other players could be the Body Control Module (BCM) or instrument cluster. All these components talk to each other over the PCI multyplex data bus. One component or poor connection can effect the other. You can reset the BCM and bus by pulling the IOD fuse for 2-3 minutes. It's in the fuse box (IPM) under the hood