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Will not clear, will not add refigerant

Hi, TIA. I purchased a 34700 in unknown working condition. My plan was to fix it up for my pops and give it to him for his garage. It needed both 96" hoses and all 3 36" hoses. I also drained and put new Robinair vacuum oil in the vacuum pump. The filter/drier appears to be new. After purchasing these I tried the unit. Unfortunately it will not clear nor will it add refrigerant. I called Robinair tech support they had me clean some of the solenoids, that did not help, nor do they seem to turn on for this process anyway so I'm not sure what the point of that was. At any rate, they had me check the vacuum at the suction port of the comrpessor. IN this particular unit this is the older compressor with all 3 fittings on one side. the 1 out of 3 fittings that point down is the suction. Without unhooking the other 2 and putting a vacuum gauge on the suction port I actually saw a little bit of vacuum when performing a 'mock add refigerant'. I asked them if this certainly meant that the compressor was bad and that it could not be an issue with the other two lines. They assured me it was a bad compressor. I ordered another compressor and installed it, I experience the same behavior, although, this time I unhooked 2 of the 3 lines, and if I put my thumb on one and gauge on the other I get good vacuum and quick. Any thoughts? Thanks Chris

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Ok, you replaced the compressor so you had to of taken all that Freon you loaded by unloading it so as not to damage the new ac compressor. Let me explain it like this: pretend your compressor is like a bike tire and that only way to take the tire off is to remove the air in the inner tube. Once the inner tube is empty then it's safe to replace the tire "compressor." When charging the a/c line your need to check that its empty by using a/c gauge that shows if its empty and if it fills using Freon and turning wheel on the a/c gauge. I check for leaks also then to verify that my Freon isn't leaking from a/c lines using yellow die added to a/c gauge line. All I can say is get a friend that is willing to fix it by showing you how as so far it sounds like your spending a lot of money for several minor repairs needed to make it work. A/C repair is major profit for a mechanic as my brother is master mechanic and he makes $150s a hour to fix a/c.

Posted on Apr 27, 2014

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Posted on Jan 02, 2017

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