c not always work
A/c may or may not work when we start the engine but usually starts working after while and works good and cold.When not working the fan don't come on and there is a line through the snowflake on the control panel?
Cars & Trucks - GMC - Yukon - 2003 GMC Yukon
Answers & Comments
Have your A/C serviced just to make sure you have the proper amount of freon in the system. If you don't have the right amount, the system will work on occasion when the pressure is just right and won't be constant. The fan works on 2 separate systems. One is to prevent overheating of engine and the other is the a/c. If the pressures aren't right, it won't turn on either. The compressor pumps the freon into the condensor and it's under high pressure. The fan turns on to cool it off... If there isn't enough refrigerant, there's nothing to compress and it won't work. Hope this helps.