Signs that your air conditioning system may be in trouble:

• If the air coming in from your air conditioner smells damp, musty, or moldy and is only slightly cooler than the air outside,
• In cold weather, your cabin either doesn't warm up or only slightly warms up compared to the outdoors.
• The defroster either operates improperly or takes longer than usual to work.
• Your heater or air conditioner only works while you're driving and not at idle, or it stops blowing when the car is stopped.
• The air conditioning or heating system is blowing warm air.
• Even at the highest fan setting, there is little airflow.

An extensive assessment of the heating and cooling system includes:

• The blower and internal controls being examined
• Examining the thermostat, hoses, pressure radiator cap, and radiator coolant operating temperature
• Looking over the compressor belt
• System and seals inspection for leaks and other defects
• A pressure test of the cooling system
• Confirming the A/C pressure complies with manufacturer requirements
• Measuring the temperature of the vent air within