I was attempting to replace the bulb in my 07 Sonata's dome light. After installing a new bulb, I pressed the ON button and the bulb shorted and started smoking. The fuse assigned "memory" under the dash blew. I replaced the fuse and then noticed that the HVAC blower was running while the car was off. Even the little electronic display for the HVAC controls was on. I can control the blower speed and even turn it off. It will just stay on if I don't manually turn it off. Any ideas? Blower relay or resistor? Does anyone know where this is located?
HVAC blower runs when car is turned off on 2007 Hyundai Sonata
by geek4tech in Aberdeen, MD on March 19, 2010
ANSWER by Bret Bodas , March 19, 2010
When you have fuses blowing and smoke from the electrical system, it indicates a short circuit somewhere, and this can cause all sorts of odd problems, like the one you are experiencing. I would focus on isolating and fixing the short that blew the fuse, and checking for diagnostic codes in all the control modules.