An extremely common cause of automotive air conditioner cooling problems happen due to no refrigerant in the system.

Our chart below will help you potentially identify the issue you are experiencing.


Automotive Air Conditioning Diagnosis Chart

Low SideHigh SideDuct TempPossible Cause
LowLowWarmlow refrigerant charge
HighHighWarmOvercharge of refrigerant
HighHighSome CoolAir in the system or overcharge
NormalNormalWarmMoisture in the system
LowLowWarmExpansion valve stuck closed
LowLowWarmOrfice tube plugged
LowLowWarmHigh side restriction
HighLowWarmCompressor or control valve failed


Now that you have potentially diagnosed the issue you're going to need a set of tools for the repair.

Click this link to go directly to our store.

March 05, 2020