Learn to diagnose common problems in your vehicle and you may save a lot of money on costly repairs. Air conditioning problems are quite common and can be very simple to fix or may be major issues. Troubleshoot your air conditioning problems in a Chevy Cobalt.
Check the temperature controls to make sure they feel right. If they are not working the same as they did before the air conditioning went out, then it is as simple as a fuse problem.
Find the fuse box in a Chevy Cobalt on the passenger side of the center console near the floor. The fuse that controls the air conditioning is number 10. Replace it with one of the replacement fuses available, which are numbers 2 through 5.
Turn the car on and adjust the air from low to high and back down again. Listen for the blower motor. The noise should increase when turned higher and decrease when turned lower. The blower motor will be a black cylinder-shape with a white plastic bowl-like piece on top.
Unplug the electrical connector, remove the stakes holding into place with a chisel, remove the nuts and take it out to inspect it.
Look at the compressor if all else fails. This is tricky to do, since the car must be raised to look at the compressor in a Chevy Cobalt. It is on the right side near the fender. It is a silver-colored cylinder shape with multiple extensions from it.
Look at it while the engine is off. A common problem is just requiring a new belt. Make sure all of the connectors are intact, and there is no rust.
Examine the control module in a Chevy Cobalt if the dials and switches on the dashboard are working correctly but have no effect on the air conditioning. First disconnect the battery. Drain the coolant, disconnect the inlet and outlet hoses from the heater core, disconnect the blower motor and remove the instrument panel trim. Raise the center floor outlet duct; rotate the center floor outlet duct forward at the same time pull down on it to remove it.
