C4 Corvette check engine light, or in this case check air conditioning system light can be used to diagnose what is wrong with your climate control system. The light above the climate control buttons will flash indicating a problem and you can check the codes by holding the up and down fan buttons for 5sec. You will see -00 and then hit the auto fan button to get the code. How to Replace the Battery in a C4 Corvette: https://www.youtube.com/watch?v=gk03-roWP2A How to Change the Fuel Pressure Regulator in a C4: https://www.youtube.com/watch?v=yG0y3bqaV7E How to Change the Waterpump in an LT1 or LT4: https://www.youtube.com/watch?v=vTl6UNMKjLc Sick Nasty Z06 Corvettes in a parking garage: https://www.youtube.com/watch?v=DpWErJC5kZA The codes are: Temperature door motor circuit fault...01 Temperature door motor circuit fault...02 Outside air temp sensor open...........03 Outside air temp sensor short...........04 Inside air temp sensor open..............05 Inside air temp sensor short..............06 Sun load sensor open.......................07 Low refrigerant detected....................09 Serial data failure.............................10 *If the video was helpful, remember to give it a "thumbs up" and consider subscribing. New videos every Thursday* -Website: https://www.ChrisFixed.com/ -Facebook: https://www.facebook.com/chrisfix8 -Twitter: https://twitter.com/ChrisFixed -Instagram: https://instagram.com/chrisfixit -Subscribe Here: null -YouTube Channel: null Disclaimer: Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.