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    balhinc's Avatar
    balhinc Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 26, 2009, 06:28 PM
    Used A/C unit & line size
    I have a 2 ton unit (very old - The Smithsonian is asking for it!) and the compressor just shorted. The line is 1/4 inch. The technician that came out said that all newer units use 3/8 inch lines. He also said you could put a newer unit designed for a 3/8 inch line onto to the 1/4 inch line, but that the "head pressure" would be greater and the compressor would fail quicker.

    Does this make sense?

    For various reasons (contemplating an addition) I would like to just get a used unit and have it hooked up and make it through this year. Any thoughts?

    Thanks!
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Jun 26, 2009, 06:45 PM

    If you are looking at a used unit then hook it up as it is. If you are going to go with a new unit then the lines will need changed
    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
    Full Member
    		  
    #3

    Jun 28, 2009, 06:33 AM

    In my opinion, your options are fix what you have or spring for a new unit. Any used unit will cost just as much to install as fixing what you have or will likely have its own headaches.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Jun 28, 2009, 08:42 PM
    Maybe consider replacing the bad compressor, instead of installing someone else's used (how knows) what could happen to the used unit
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