Question about 1999 Dodge Durango

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Changed Compressor not blowing cold enough

I had a major leak in my compressor. So, we changed out the compressor and drier. Then, vacummed out the system and replaced the refrigerant. We bought the expansion valve, but due to a miscommunication it was never put in.

Before the compressor was replaced it blew very cold air. We would just lose all the freon within 24 hours due to the leak. Now, it blow cool just not as cool as it should. I've had the freon checked and it is full. Could we need to replace the expansion valve??

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If you tried using a refrigeration "sealing" product before changing out the compressor, you most likely do need to replace the expansion valve.

The valve "flutters" open/close/open/close/etc/etc when in operation. The purpose is to allow the compessor to build up enough pressure to change the freon to a gaseous state. Once you put in the sealer, the valve becomes plugged with the product and cannot seat completely. After this happens, you never get a full phase change because the pressure cannot build up enough. You will experience reduced cooling. Change the Exp. valve and you'll be set. In the future, it is not advisable to ever use the sealer products as this can cause damage to other system parts, and especially the recovery units at the shop.

Posted on Jul 30, 2009


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