A/C Not Blowing Cold Air...among other things

[yarisitis]

Originally Posted by PhilD424

The thermostat is a circle that opens and closes in the upper radiator hose mount that goes into the block. When the engine is cold and the coolant is cold, it does not allow coolant to flow into the radiator. If your thermostat is mal-functioning then it won't open to allow the coolant to go through and be cooled and it overheats the engine. You could also have a bad water pump. Pull out the thermostat and re-connect the hose and see if it still overheats. If I were you'd I leave the thermostat out it provides better flow. Only downside is it will take longer to warm up in the winter but 4 bangers warm up quick anyway.

So this has nothing to do with the A/C not blowing cold air? Only the engine overheating?

Take this into consideration. I've driven from Los Angeles to northern California (300+ miles) non stop a couple of times already without the A/C on and had no problems with the engine overheating. The overheating light only comes on when I'm using the A/C.

I'm a little hesitant about disconnecting hoses and taking parts out but I'll have a look and try and see what you're talking about.