Ac quit and engine started to over heat . could it be a relay???

Your cooling fan is not coming on when engine is warmed up. Could be the fan motor is broken. You can check this by checking the fan operation when the a/c is on and engine is warmed up. Look at the fans and see if one or two are on. If both are on then your temperature relay is unplugged or broken. If just one fan is on then most likely the fan that's not on is broken.

Check the fuse & relay (owners manual will show you where the box is)
Relay box in under the hood on the driver side just above the tire.
Inside fuse box should be on the side of the dashboard (driver side) very close to the door hinges.
I'm pretty sure you popped a relay or fuse during the jump.

You can pull the possible bad relay out and grab another relay (borrow it) from something else like brakes or lights.... just make sure it's the same part number.
(don't use fuel or engine control or anything that would stop the car from working)
Swap them and start the car to see if the AC/blower is working.

Hope this helps

Just a thought: If your car has 2 electric fans under the hood one of them runs anytime your AC is on. Make sure one of them is running if you have 2. When your engine warms up both will come on. Check when the engine is cold to see if 1 fan comes on when you turn the AC on. Another thing which has happened to me. I had a bad AC relay after running a while it would get very hot when AC seems to quit working try feeling the AC relay if it is a lot hotter than the other relay that could be a problem. One more thought To add Freon the car has to be running and the AC on.

Have you noticed that the AC quits blowing cold air when you are heavy on the throttle, or climbing a hill? Does it return to blowing cold air when you let back off the throttle and relieve the load from the engine?

If you answered YES to those questions, your AC is operating normally. AC compressors take quite a bit of power from the engine to operate. In vehicles with smaller engines, the AC compressor will disengage when there is a heavy demand for power placed on the engine, and you will not get cold air. When that demand is gone, it re-engages power to the AC compressor.

If the motor does not sense it is getting too hot, the fans will not come on. When it reaches a certain temp, they will come on. If you are having problems with over heating, and the fans are not coming on, I would suspect the fan temp sensor, or the PCM.

check the blower motor relay and resistor.

sound like a ground wire loose bad connection.if it comes and go if no gauges windows or ac / heat not working. check relays and fuses. it could also be body control module.

There is a resistor block in the heat duct that controls fan speed usually when these go out the fan will quit on one speed but work on others until finally all speeds quit,also there is a relay that powers the fan it is under the hood in the relay box

Check the AC relay at the engine compartment. Remove it and clean out the connections. Put it back in and try to start the AC.Gently tap the relay with the backend of a screwdriver or similar object. Sometimes relays get stuck either in the on position or off. especially if they are a few years old.If it starts, replace the old one with a new relay.

hi,inmany casesthe ac clutch stops working because the freon presure is low,this happens to prevent damage to the sistem , you can check ac fuse and relay ,but be sure to check freon presure.....