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We had a service technician come out and work on our a/c unit yesterday. He replaced the fan motor (only 2 years old) and insisyed that the fan blade needed cleaning. Next, he said we needed freon, but that the company policy stated that they would not add freon to a unit without first cleaning the coils ($188 for the cleaning). We have never had a technician tell us this before. Sounds like a way to make more $. Can you confirm if cleaning the outside coils is absolutely necessary before adding freon?

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In short, yes, you have to have the outside coils clean before adding refrigerant so that you can correctly charge the unit. Dirty condenser coils will cause a rise in pressure inside the system because it cannot condense the refrigerant correctly. On the other hand, unless your coils are corroded or completely clogged with a abnormal substance, most people wash out their own condenser coils with a water hose. You just start at the top and work your way down with a left to right motion, being careful not to bend any of the aluminum fins, which usually takes quite a bit of pressure. All you need is to make sure that your coils are able to have air pass through them freely. When they say they are going to clean the coils, they actually use a chemical substance that they spray on and rinse off and if you can avoid it, you can save that ridiculous fee! Hope this clears some things up and good luck!

Posted on Aug 25, 2010

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I did google image search for "replacement vent fan motors" and results show choices.
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