I Checked out my AC this summer and it did not cool the air, so I removed all of it except the aux. cooling fan. All fittings were loose, so assume it wasn't working last winter either. I didn't have any problem then with defrost/defog. I haven't had any problem with defog since the change. I also removed the fan off the motor. I put a jumper across the condenser switch, so when ac is on the ac fan (in front of rad.) runs and now use the ac aux. fan to cool the radiator. Seems to work, haven't had off road since, or in real hot weather (which may not happen in western Wash.).