AC STUFF
So you decided to remove the AC Blower Motor. This one is easy to annoying difficulty cause you got to cut the original out and drill the original plastic, unless someone did it before then it is just turning some screws.
My 05 chevy cobalt had a ac issue, working on fixing it, have new parts.
made a post on some cobalt forum no good reply yet.
You can remove this front wheel without draining the entire system. There is a magnet in it that when you turn on the system clamps down and runs the compressor. If the wheel, magnet or something goes bad you can replace just the front part. This is the wheel that the serpentine belt runs across.
That is the crack wheel then the ac compressor then above them is the alternator. SS model cobalts have an additional wheel the belt runs I think.
So you decided to remove the AC Blower Motor. This one is easy to annoying difficulty cause you got to cut the original out and drill the original plastic, unless someone did it before then it is just turning some screws.
My 05 chevy cobalt had a ac issue, working on fixing it, have new parts.
made a post on some cobalt forum no good reply yet.
The top image you need to take apart your old ac blower motor and put this in the plastic cup to mount it again. The 2 problems you'll encounter are that the original is fused in so you have to cut it out around the edge with a short thin knife (good luck with that one) or a razor (and not a skinny plastic retractable razor it will likely be to weak and snap).
The 2nd problem is that the cup has 2 plastic 'bolts' and you have to drill the plastic so that the new screws can secure the new motor to the old plastic housing. So if you have a drill and knife is just advanced labor.
The image below is a 1 piece replacement. You'll still need to cut out the original around the edges. That means cut inside a small seam running around the blower motor, like cutting a tire off a wheel basically. I used a heavy duty triangle shaped razor blade with a thick handle like a knife basically and was kind of easy to do aside from the way you have to position yourself to do it.
Then finally there are 3 screws holding it in and then a plug to connect. The back screw is difficult to reach and hard to do while holding the thing up and getting the first and second screw in. Have a friend sit in the car and hold it up for you if you want to make it 100 times easier. You'll need a short screw driver for the rear screw because of no room with the floor and carpet raising up.
The Chevy Cobalt has a AC Fuse in the right side of the interior console behind a panel in the fuse block near the passenger side where a passengers feet are at, on the left, behind a plastic panel you pull off being retained by metal clips, is a interior fuse block panel.
2.) There is a fuse in the under hood fuse block box.
3.) There is also a "relay" in the under hood fuse block box.
4.) Under the passenger side airbag and glove box is where the AC Blower Motor Fan is. To remove this you initially the first time have to cut it out with a razor blade or knife. Cutting it out of its plastic housing seal that is created by its design.
When you replace it with a new fan blower motor you 'simply' unscrew 3 screws and drop the old one, unplug it and then raise a new one up and screw it in.
5.) Next there is a Blower Motor "Resistor" which is located under the glove box passenger side area next the blower motor in the same area on the left side in a housing, you have to release it from a clip holding it in to the housing. This resistor is larger than a credit card and has a plastic mounting resurface at one end that has a plug design for a single large wire to connect it to the car.
This resistor is what controls the power the blower can run at, stepping it down to a setting of 1, 2, or 3 on the thermostat box switch selector. Meaning if it is hot or cold you turn the switch up to 4 max for heat or cold AC air. If you then decide to turn it down some and go to 2 but nothing happens you have a bad blower motor "Resistor." (possibly a bad switch box? not sure about that)
The thing about a bad resistor is you can still run the heat and AC but only at the highest setting of 4. That is because the motor is designed to run at its highest setting and it's only the "resistor" that steps it down, so if it goes bad you can not step it down and thus only run on high.
6.) It is possible to switch out a bad thermostat selector box, and if you look hard enough you can find the parts and pieces to only replace the switch you turn from 1 to 4. Other GM vehicles share the same parts but Chevrolet isn't selling the switch alone for the cobalt only the entire box.
7.) The AC Compressor is located under the hood on the left side in the front of the car near the ground and is the largest circle running off the serpentine belt under the alternator. The 2005 cobalt has only 3 wheels spinning, 1 the crack wheel, 2 the alternator on the top and 3 the ac compressor on the bottom, in addition there is a automatic tensioner keeping the belt tight.
Do not remove the ac compressor on the chevy cobalt because it like all other ac compressors is filled with dangerous chemicals (Freon) that if you attempt to unscrew the thing it will explode on you and spray you with freezing Freon and be bad for the environment also, so don't vent to air when change it, take it to a mechanic to drain it correctly.
Then you have evacuate the system with a air compressor to take out the air and moisture in the tubes of the ac system before refilling the system.
8.) There is also the front metal panel, radiator that plays a part in the heat ac system, and a few other parts and pieces.
