Complete DIY Mini Split Installation | New Mr Cool 4th Gen Unit

I wish I could like this video twice. I've watched it like 4 times, all on separate occasions and I know I'm going to watch it again when my unit comes. Great to-the-point explanation with perfectly clear instructions. Loved it.

this man is doing god's work explaining this stuff. fixed a bunch of outlets and electrical wiring thanks to him. it's the small stuff but yea.

GREAT VIDEO!!! i was quoted $13,000 to install a mini split in my 850-square-foot house in Las Vegas. . i knew IMMEDIATELY he was a rip-off!!!

I just completed the install of the same 18k unit. I also did the electrical myself thanks to YT and help from a local electrical supply house. I watched prob 20 YT videos before-hand... to the point I could walk through the install process in my sleep. One tip; the condensate drain hose from the air handler is very flimsy plastic material. I can't see how it would last over time with temperature changes. I replaced it (right at the 5/8" OD connector on the back of the air handler) with 5/8" ID reinforced PVC tubing. It took me two significant efforts contacting MrCool to properly identify the size of the connector. I wanted to have the replacement hose ready before I purchased the unit, as I did for all tools, parts and accessories. You mentioned the challenge of finding wall mount racks suitable for 32" wooden wall studs -- no kidding! I ended up going all stainless... the 2 vertical racks, as well as 6 - 3/8" hanger bolts (SS) I ordered online to mount the brackets to the sidewall. The rack is 'stood-off' from the siding with about a 1" space to allow for painting around it. To bridge the 32" space between the two vertical stainless mounting brackets, I got 2, 2x4 aluminum bar stock pieces to bridge between the brackets and mount the condenser to. And ALL SS hardware everywhere. All in, I spent over $170 in mounting rack hardware. Even though it's mounted on the exterior garage wall with all the space of a garage between the condenser and the house living space, it will vibrate the wall enough that it sounds like a truck is passing by on the street sometimes. I'm investigating different vibration isolation pads that might improve the situation. In this video the extra lineset coil is stored vertically, which contradicts the MrCool instructions. In multiple other YT videos HVAC people have commented this is bad, as it can lead to oil collecting in the lines and affect performance. They should be coiled horizontally. In my case the line set ran over my garage rafters and I was able to coil the extra horizontally there. The AC whip I bought could be cut to length (unlike some), as I wanted a clean installation without FEET of extra cable dangling around off the condenser for a sloppy look, but to each their own. Also, I used a 25 amp breaker, with 10/2 Romex, at the suggestion of others, including the people at the electrical supply house after showing them the units electrical specs. It was a very satisfying project to complete -- I'm very happy with it. My experiences with MrCool customer service have not been so great however when I had questions.... getting someone to respond takes a lot of patience and perseverance. I hope I don't have any issues with it as I feel I will be mostly on my own. As observation is that I don't understand how their warranty can even be legal. To get the full warranty they require you to purchase, TWICE A YEAR, their $70 maintenance kit, which is a MASSIVE RIP-OFF. You can get a much better quality, reusable evaporator enclosure bag on Amazon for $30. Who doesn't have pump sprayers (or buy a $25 Chapin), and buy more more reasonably-priced coil cleaner ($10-12/can). Or, do what many HVAC pros do and mix some Dawn with white vinegar to spray the coils with. So if I PROPERLY clean my unit twice a year for a FRACTION, and I mean FRACTION of what the MrCool kit costs ($700 for 5 years!), then I have no warranty. Nice.

One thing about the extra coiled line, the coils should be in the horizontal direction not vertical, this might have fluid sitting on the bottom of one of the loops.

Great video. In our house the wall mount bracket for the Mr Slim Mitsubishi' s did transmit a loud vibration to the interior as the variable fan speed ramped up and down. Very irritating. I solved it by ordering four silicone vibration isolating pads with threaded rods up and down. They were round, shaped like a squishy bell, and totally cured the noise issue.

It looks great! I put one in our back room (not on the home hvac). It works ok with heating, but really shines in the summer for cooling. I put ours on a concrete pad, but your wall mount came out really clean, especially with that extra line set coil.

There's no refrigerant in the lines, they're just pulled to a vacuum, which you pierce when you connect the lines. All the refrigerant is in the unit, which is released when you open up the valves. "Precharged" is just not true, they're "prevacuumed". You could also just order any decent mini split from Daikin or Mitsubishi, get a $150 vacuum pump and do it properly yourself. You'll save yourself hundreds of dollars. The hardest part is not kinking the copper lines, but if you get a $50 tube bunder for AC lines, you'll save yourself a lot of hassle.

Nice work! I installed my 1st Mr. Cool in 2018, no issues!

I mounted my outside unit on four PVC pylons filled with concrete and bolted the unit into the pylons. They're two feet tall. It's NH so we could get a 2' snow storm and have in the past.

Excellent. Very thorough and easy to follow.

I’ve got 2 24k btu units in my 900 sq ft shop. I only run one except in the hottest and coolest parts of the year. Works great.

Great teacher, terrific information well presented!

I have a Mr Cool 9000 btu Unit, a little over 14 months in use, in August of 2023, unit failed, I couldn't get a response from Mr. Cool. Local HVAC charged over $300 for freon and labor, 8 months later unit failed, finally reached Mr Cool. They didn't care about my having to pay already, plus they demanded $250 to ship like unit one state away. I finally went and picked up the replacement unit. One day (600 miles round trip) and spent $60 in gas to get a replacement "UNDER WARRENTY".

Everything looks great and you did an awesome job of explaining the whole install in simple terms. One thing to note however, is it's been in several NEC code cycles now, but you'll want to let people know that code requires a GFCI protected outdoor receptacle within reach of the disconnect and the outdoor condenser unit. It's required for servicing the unit.

Searching and watching videos on this for several hours, this is by far the best most thorough video. Excellet

I have DYI several mini splits. I use a vacuum pump and the correct length lines to make a more professional instalation. Also the outside disconnect does not need to be fused..

Thanks for this very helpful information! 👍

Muy bién explicado..muchas gracias.

2 grand is a great bargain! For a garage that’s perfect. I’m seriously considering one for my garage. Always great videos!