I have an 88 Camry V6 LE and two of the buttons for the AC doesn't work. There's 4 buttons total for the 4 different AC settings (lo, 1, 2, hi), but the lower two settings don't work. When you push down the button for either lo or 2, the light turns on signifying that it's selected, but no air blows out. It works on 3 or hi setting. I tried pulling out the whole AC control panel to test it, but I couldn't make heads or tails of what I saw. The only thing I could get out of it was knowing that all the buttons complete a circuit when pressed. Can anyone help?