Rick's Free Auto Repair Advice

Posts Tagged: A/C blows warm

Car AC blows warm air — How to find the cause

Car AC blows warm air— How to diagnose and fix Many other things can cause an AC problem. A refrigerant leak is the most common cause, but even a fully charged AC system can blow warm air. If your car’s AC blows warm air, here are the most common causes in order of occurrence. They are: 1) The system is Low on refrigerant due to a  leak 2) The compressor clutch not engaging because refrigerant pressure is too low, the clutch coil is shorted or open. 3) The flow control … Read More

No AC, Service Power Steering message

AC blows warm and service power steering and drive with care message GM has issued a service bulletin #PIT5508 to address a situation where the AC blows warm air and you receive a Service Power Steering and Drive With Care Message. The AC blows warm because the AC compressor clutch fuse has blown. The computer may store a C0545 00 / AC compressor Inoperative trouble code or B393B Fuse F60UA or F35UA. The bulletin affects the models listed below: 2015-2016 Cadillac Escalade Models 2014-2016 Chevrolet Silverado 1500 2015- 2016 Chevrolet … Read More

AC blows cold then warm Dodge Ram

AC blows cold then warm Dodge Ram Dodge Ram 1500 intermittent AC, Compressor quits, blows cold, then warm, warm AC There are basically three sections to the AC system; the sensors (high and low pressure sensors and the AC on/off switch), the command unit (the powertrain control module- PCM), and the “doing” components (the compressor clutch relay, compressor clutch, and the compressor). The sensors inform the PCM if system pressures are too high or low. And the low pressure sensor provides the information on when to cycle the compressor on and off. … Read More


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