human
I'm having trouble with my car's air conditioning system. What's the cause?
assistant
The most common cause of air conditioning problems is a lack of refrigerant. Make sure to check your vehicle's manual for the correct type and amount of refrigerant that should be in the system. You may also need to replace the compressor, condenser, or other components if they are faulty. If you're unsure how to fix it yourself, take your vehicle to a mechanic for further inspection.