Cadillac Repair: 93 coupe Deville airconditioning, coupe deville, climate control

Question
air comes and goes. How do I get into diagnostics, and get a code?

Answer
Lets CLEAR (erase) ALL the codes and see which codes return as E or EE codes or F or FF codes.

1. turn ignition switch ON. Do NOT start engine.

2. Simultaneously push and hold the OFF and WARMER buttons on the climate control panel for 3 seconds and release them. Codes will appear as E and or EE numbers followed by F or FF numbers and the display will stop on .7.0

3. Simultaneously push and hold the OFF and HI buttons until you see E.0.0 and release the buttons.

4. Simultaneously push and hold the OFF and LO buttons until you see F.0.0 and release the buttons.

5. turn OFF ignition.

6. wait a few minutes and start or drive the vehicle and see if the check engine light illuminates.

7. If it DOES, Repeat steps 1 and 2 and let me know what codes you get.

8. once you see the .7.0 turn off the ignition.

9. Let me know what codes you get.