Air conditioner isn't cooler
SOURCE: air conditioner works but no heat
The inside heat is provided by a small radiator running engine coolant. If you don't have heat and you don't have scolding water pouring on your feet then the coolant isn't running - most likely the valve controlling the flow is broken, replace it.It's easy to find, its located on one of the pipes leading from the engine and going inside the dash, with a control cable attached to it.
SOURCE: In my 2007 Saturn Ion
Sounds like you have a loose wire, probably at the fuse panel for the AC fuse, but be prepared to trace the wiring if the bad connection isn't right at the fuse panel.
Replace the fuse, and see if that clears up the problem.
If it doesn't, measure the voltage on both sides of the fuse so that you can see which direction you have to trace the wiring.
if there's no voltage going into the fuse, start tracing between the ignition switch to the fuse panel.
If there's power to both sides of the fuse, start tracing the wire from the fuse to the AC unit and temperature gauge. Also investigate the temperature gauge itself, as the AC shutoff may be contained within it.
If there is voltage on only one side of the fuse, investigate the fuse itself and the socket in the fuse panel.
SOURCE: 2002 saturn vue 3.0 L
That is not good, 9 times out of 10 it means a blown head gasket-you need to drive it as little as possible until you can determine the problem-here are a few clues. Does it smoke when running, from the tail pipe? Does it run rough? Are you losing antifreeze with no visible leak? Is it running hot? Is there anti-freeze mixed in with the oil? It can be caused also by the trans cooler mixing trans fluid in the radiator-so check your trans fluid on the dipstick too. The best way to find a problem like this is to pressure test your cooling system, do not let this go too long or repairs will be much more expensive.
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