Cadillac Repair: ac, climate control, pulley

Question
HOW DO YOU CLEAR CODES ON A 1989 DEVILLE GOT CODES F13 F48 HAD TO REPLACE AC PULLEY AND CLUTCH AS THE PULLEY WAS BROKEN NOW THE AIR WILL NOT COME ON THANKS

Answer
1. Ignition ON. Engine OFF.

2. Simultaneously push and hold the OFF and WARMER buttons on your climate control panel for 3 seconds and release them.

After the codes display you will see .7.0

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

shut off key.