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Posts Tagged: AC blows cold then warm

Car AC blows cold then blows warm

Car AC blows cold then warm If your car AC blows cold then warm, the cause can be a low system charge, moisture in the system, a malfunctioning expansion valve, clogged evaporator fins or an overcharge condition. Here’s how to nail down the cause. Low car AC charge causes evaporator freeze up and low airflow A low system charge can cause the evaporator coil to so cold that it freezes the condensation on the evaporator fins. The ice builds up until it blocks airflow. Then the AC system shuts off … 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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