Install my own mini-split

I assume you are talking about the MrCool DIY version? If not, I think you lose the warranty on other brands/models if not installed by a professional.

Have you priced one with an installer? Are you looking at a cheaper option or a well known brand like Mitsubishi?

One of the pitfalls of a DIY is the excess cool length in the lineset. If you’re installing where you don’t need the full run, you’ll have to just coil that excess up somewhere and hang it (either near air unit or outside by condenser). It’s unsightly and immediately screams DIY if you see it.

Another potential problem is condensate leaks. Depending on where you install it, a leak could be disastrous. Mini-splits don’t really have a float switch (Some have options now) or back-up pan. So if it leaks, that water is going to run down your wall until you notice it’s a problem.

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Are there pitfalls?

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One is that the lineset comes precharged like you mentioned. BUT, the line set is REALLY long bc they obviously don’t know how much is needed your your application. So you are stuck with tons of line that you are stuck trying to hide somewhere and the install will look like crap if you hide it outside. It will have a much better look if the line set is cut to the proper length for you application.

ETA. Dammit LSUtigerME.

That is helpful. Think I'll get quotes for a turnkey installation

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$4500

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woof

Do the hard work of mounting everything. Pay a tech to come finish the install. That’s what I did. Learned the hard way. Let them make the connections on both ends. I jacked my swage connector on interior and had to have it redone after it all leaked in a month.

I think the original bill was like $130 for him to come pull a vacuum and make that outside connection for me. The other second out was all my fault.