Why isn't my air conditioning blowing cold air?

jordanr

BAT Auto Editor
Joined
Feb 10, 2013
Messages
343
Likes
2
Points
18
#1
Ben goes over reasons why your car's air conditioning might blow warm and not cold air. He shows simple testing on his Subaru Outback. Tools needed are a pressure gauge and a temp gauge.


Step 1 is to check the pressure in the system without car running. Then check pressure while running.

Common Causes of no cold air
* Not enough pressure
* Too much pressure
* Electrical issues giving power to compressor such as fuse, relay box or wiring
* Belt slip on compressor
* Clutch slip on compressor
* Controls on climate control system at dash

Ben also talks about why you might get cold air on one side and not the other side of your car.

What other causes can you think of or suggestions for basic diagnostics of air con blowing warm?