Re: 2000 Malibu having trouble with the A/C. For one
If its blowing out all vents when just set on front, then either the control panel is bad, or a actuator that controls the vent doors is bad. Most of them or on vacuum, so id lean more to the panel. The antifreeze problem might be the one everyone but me seems to have. There is a leak in the intake manifold gaskets. Chevy I think had a recall on it or something. Its a wide known issue. If you look underneath the manifold where the injectors are you may see some fluid. The other options are just hoses, that leak when they get hot and expand. Or you may be burning it in the combustion chamber.
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That is correct, the air blend door actuator. "flapper valve" may need to be replaced or cleaned and free from binding up. Good luck and hope this helps. If there is an Auto Zone in your area, they can order the part you need and give you the step by step instructions to removing the old actuator and replacing it if it's damaged. Good luck and keep me posted, be glad to help.
If fuse keeps blowing that means that there is a shortage on AC wiring or switch controlling the air conditioner.
Also an abnormal power draw from AC caused by an internal fault on AC can cause the fuse to blow. Test wiring and switch with a voltmeter, the most common is that there is a short to ground between wiring and car body somewere.