I have had issues with my power windows and radio in the past but now everything has died at once!

The power windows, wiper motor, radio, and a/c have all quit working at the same time. The heater is blowing on the lowest setting but only hot air. Even when set to a/c it blows hot air on the lowest setting. I cannot get anything else to work.

Any ideas?

Check fuses/wiring. It sounds like the whole accessory circuit is gone. Also check grounds. Something like that should be pretty big and easy to find...