What are the symptoms that the filter dryer not working well/ failed / clogged? When do we change it? What are the steps taken to change the filter dryer? Is there any web site that can guide to the above?
Answer:
A restriction is not always a clogged dryer, more so the metering device, or moisture. Most of the time a clogged dryer will expand the refrigerant and show a frost line. To change, you need to pump the refrigerant down into the receiver, or condensor. When it can't contain the refrigerant, you can use a certified vessel, for the extra that it takes to bring it to 0 pounds gauge ( atmospheric pressure) The dryer can be removed without danger of air or moisture rushing into system.
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