Noisy AC unit

[FenderBender]

Usually, I do not use the AC in the car but with temps in the 100's I have been running it this week. I noticed that when it is running my car has a rattle to it. It doesn't do this when it is off. What could be the cause of a noisy AC unit in the vehicle?

 

[Hotrod25]

Perhaps there is something caught in the blower or motor? You would need to check it out. You could also have a loose screw! Is it still blowing out really cold air?

 

[vroombaby]

Have you ever needed to have it serviced before? I have heard about this in older vehicles especially when there are high temp's, how old is the car now?

 

[FenderBender]

It is still blowing out cold air. I have not had it serviced before and it is over 10 years old so maybe I should think about it. I haven't had it on in a few days now.

 

[isis1]

It sounds like the A\C unit is getting ready to burn out. If you have never had it serviced after all these years you may need a new one. It could be costly too. Anything to do with A/C in a car can be expensive. In my state, Florida, they have strict rules for mechanics working on them.

 

[Vroom Vroom]

Does it mainly do it when the AC is on and the car is stopped or parked? Mine was making a loud rattling noise. It turned out to be the compressor.

 

[Blitzer]

When it makes a noise like that it usually means it's about to go. If you can't troubleshoot it yourself I'd take it to a mechanic so they can diagnose the problem.