Hi everyone. I have a 96 Grand Cherokee and there is no air coming through the defrost vents on top of the dash. All the other vents are working fine and the heat and cold are OK too. I have tried to bring up the HVAC codes but I don't know how to read the results. When 00 comes up, what do I do next? If i turn the dial to 01 and then push either the AC button or the Recirc button, a number appears, when I turn the dial to 02 and push either the AC or recirc button, a different number appears. Are these the numbers I am looking for? Sometimes there isn't a number at all and other times the HVAC system kicks in full blast. Can anyone help?

Azore