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Automotive Air Conditioning Diagnosis Chart

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 Side High Side Duct Temp Possible Cause
Low Low Warm low refrigerant charge
High High Warm Overcharge of refrigerant
High High Some Cool Air in the system or overcharge
Normal Normal Warm Moisture in the system
Low Low Warm Expansion valve stuck closed
Low Low Warm Orfice tube plugged
Low Low Warm High side restriction
High Low Warm Compressor 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.

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