Why I, MrCool, Am the Best

  • December 15, 2014
  • By MR COOL

In case you don’t know, I’m Magnus Cool, owner, founder, and fearless leader of MrCool.com. I want to tell you why my company, MrCool, manufactures the best ductless mini-split heat pumps on the market.

I don’t want to go on too long, so I just made you a quick list.

  • MrCool ductless mini-split heat pumps have both heating AND cooling capabilities.
  • They are built for energy efficiency, saving you money.
  • They are eco-safe thanks to R-410A refrigerant.
  • All mini-split units are packed with cool features like MrCool smart controller, sleep mode, low ambient cooling, multiple system protections, and more.
  • MrCool manufactures the only true do-it-yourself ductless mini-split with amateur installers in mind, thanks to its pre-charged refrigerant lines.
  • The MrCool min-split line has a unit for all your home’s needs, from single zone to multi-zone heating and cooling.

For more information about MrCool ductless mini-splits and all of their “cool” features, be sure to check out our video gallery here.

79 thoughts on “Why I, MrCool, Am the Best”

  1. My name is George Di Flora i purchased a 4 ton unit from Ingream heating and cooling almost 12 months ago and I have had nothing but trouble with it, ingreams will not return my calls I have spent thousands of dollars and hsve gone through 4 geo hvac cominey trying to get someone to make this unit run , can you send a repair person that can trouble shout this unit. I am in South East ohio my number is 5134052565

      1. Yes hello I install two of your products they are both split systems 2ton 2.5 ton both of them I have to go back to I got a high pressure switch lockout and both of them how to do a reset and it’s been called a couple times
        Why am I get that high pressure switch fault I have installed to hear a ductless systems no problem at all there !
        Williams HVAC

          1. You are having a lot of people start complaining about the lack of service on forums to the point some may engage various attorney general’s. I have a DIY no issues but wanted you all to be aware you need to hire more tech support or you are going to ruin your reputation.

      2. Have had the connections on the condenser inverter board burn up. Have called and left numerous messages with no reply. Have read numerous complaints of similar problem. No customer service at all. This unit is less than a year old. Numerous sellers have told me it should be covered. Thsts great if anyone will pick up the phone or reply to messages.

        1. We apologize greatly for this. Would you mind sending us a reliable contact number so that someone from our team can reach out to you? Your comment will not be made public.

  2. I’ve installed to your products 2 ton and 2 1/2 ton both were split systems I was just change out always got to go back because I got
    High pressure switch for what’s going on with that

    Williams HVAC INC

  3. It would be great if Mr Cool would come up with a 4 and 5 zone ceiling cassette unit. I love that its here in USA.

  4. I bought a diy 36000 btu mini split about 3 years ago, worked great until I got a F0 code 2weeks ago sent a email twice with no response. Called and left a message finally got a call back and when I answered no one on the other end. Tried to call back all I got was user busy this happened twice. All I can say is your customer service sucks. I will never buy any of your products in the future and will give your company bad reviews wherever I can. Your welcome.

    1. We apologize for this. Our phone lines were acting faulty last week, so that may be the reason that the calls dropped if you were contacted in the last week. I can have someone reach out to you via email.

  5. Mr. Cool,
    Seeking your help and advice.
    We are a small 200 year old single room church 30×40 with11’6” ceiling and 8 windows and 3 doors. There is no insulation in the walls, floor or ceiling. The church has been rewired.
    What type of system should we be looking at?
    Thank you.
    Dean Breest

    1. Ductless mini-splits generally work well in historic buildings, since those buildings were not designed with ductwork in mind. We would recommend you take a look at a multi-zone ductless heat pump system.

  6. Hi, I am building a 21ft x 21ft sunroom in Atlanta Georgia. Vaulted ceiling, Lots of windows on three of the walls and a couple of skylight. All will be will insulated and double pane windows have low E glass.
    I am looking at your 12,000btu mini split but wondering if I should go 18,000btu.
    Please advise if you can.
    Much appreciated!

    1. Based on square footage, a 12k might be a good fit for this space, especially since your room and windows will be well-insulated. A 12k BTU system will typically cover around 500 square feet. One thing to consider, though, is that it can get extremely warm in Atlanta, as I’m sure you’re aware. Since climate can affect the size you need, it might be a good idea to size up to an 18k BTU mini-split, which can typically cover spaces around 750 square feet.

  7. I have a 1.5 year old 12,000 btu Mr Cool mini-split. According to my HVAC repair person the blower motor has to be replaced. While the unit still heats without the blower it does not come close to heating my room addition. I’m having to supplement with 2 electric heaters. Unfortunately, two weeks of calls and emails to Mr. Cool support have gone unanswered. I’ve found a replacement motor through a third party supplier. I thought maybe leaving a negative comment here may get me some action and a response. I’ll give it another day or two then I plan to share my story with every online source available.

  8. I bought and installed a Mrcool 20seer unit from Ingrams that worked well for about 4 months. Then it died just after Christmas while it was 20 degrees here of course. Called and HVAC tech to check it out and he found a cracked pipe in the outside unit that leaked all the Freon out. The tech soldered the unit, recharged it and charged me 600 bucks for the call. This time it’ worked for about an hour and hasn’t worked since. It just blows cool air at a low fan. Ingrams won’t return my calls and neither has your tech department. Not impressed with you, the unit, or Ingrams.

  9. I have a 18k diy in my garage. The outside unit will randomly defrosting the outside cool. About every three or four day. So I have to put it in air conditioner mode to defrost it. Otherwise it’s a chunk of ice outside. This unit was installed October of 2020. And I have had this problem since it was new. Especially when it’s 30 degrees and high humidity. Otherwise unit works great

  10. Hi Magnus, my name is David Ruozi, Sr., I live in Marana, AZ., a good testing hell hole for your units. I recently purchased and installed a 27K dual zone DIY mini split system, with 18K & 9K air handlers, one for my shop and one for my mancave, the system works great, I’m very impressed with it so far. I have a minor issue with the 9K air handler, seems the fan is hitting or rubbing on something inside and to the left side of the air handler, I’ve notified your customer service team and Techs, and they are on it, I asked for and they are going to send me another 9K air handler, they told me I could disconnect the pre-charged line set from the air handler and reconnect it to the new air handler without losing it’s charge as long as I shut off the main discharge from the pump and the manifold line the 9K line set is connected to, that would be great if I could reuse the line set, however I remember reading that these pre-charged line sets use a compression seal and once they are first tightened down they cannot be reused, is this correct Magnus?, if so they’ll also have to send me a 16′ pre-charged line set with the 9K air handler. I have a recommendation, make a line set that you “can” reuse, supply new compression seals with it that can be taken out and replaced by anyone. I also would like to see you and your company develop retro fit whole home dc inverter pump systems to replace the York 4 ton ac pump gas/pac system I have now, it cost us a fortune to run in the hear we have here, I’ll let you try it out on my home for free, ha-ha, think about it though, you’d sell a lot of them, the dc inverter pumps save lots of energy cost, my mini split system is already saving us $$, thank you Magnus, keep up the good work.
    David, Sr.

    1. If you’re proceeding with the guidance of tech support, you should be fine. Thank you for your suggestion! And you might like to find out that we do have a central DC inverter heat pump split system! It’s called the Universal! Check out more information on it at https://mrcooluniversal.com/.

      1. HI MRCOOL, your 27K BTU dual mini split system is working great, to follow up on your reply to my earlier message, another great use for your DC inverter heat pumps is in the RV market for roof mounted RV AC units. The ones used now use way to much electrical power and cost a small fortune to run, if you get into this market with your DC inverter technology I’ll be glad to be the first to try them out on our RV which has two AC units, thank you.

  11. Hello
    I purchased a 36000 ,4 zone . My 18000 indoor unit makes a noise , but not all the time . I have called and did email , but no reply . I call every day for a week so far . I guess I will have to file a complaint with the BBB . This is a very poor way to do business . If I have would known this is the way you do business , I would not have purchased from you .
    I do feel the fan motor is the problem , but not sure . I just installed this in Feb 22 2022 .

  12. G’day…
    We purchased your 18K DIY last year and so far are greatly pleased with the unit. The question I have is that when the louvers move up and down I can hear a noticeable “ratcheting” sound as from the gearing mechanism. I don’t remember it making any sound when first installed. Should I apply some lubricant to the ends of the louvers or is this normal?


    1. While it should not be a concern in regards to performance, if you find that applying a lubricant assists stops the sound, then it should be fine.

  13. I purchased a Mcool unit thru Ingram’s in Feb 02 with the intent of and install in April when it warms up. Very professional knowledgeable sales professional . Gary Scott. Unpacked boxes to get a look at components. Shipped UPS. All good except one fitting on line set was a little sloppy not a deal breaker. In checking out reviews before purchasing seems that a lot of pride in Company and staff. I emailed the problem with pictures. Within half and hour was contacted informed a ticket was sent to sales. He called me all taken care of would be receive a new 25′ line set(255.00) free of charge and keep the other line set. And thank you for your business. Gary Scott, and all the are excellent. Carl

  14. hi,

    we are considering the 12000 btu, 115 volt unit for use in an RV with lithium ion batteries.
    we can calculate the wattage of course, w = a x v, but would appreciate some kind of real world numbers. but that I mean, from a cold start, should we expect the unit to draw 20 amps at 2300 watts?

    what, please, and I understand that this all depends on the environment, but what kind of “normal” range might we see when the unit is in use?

    we are in north central florida, so while it is still florida and 80s temps are normal, we are not down south, either.

    many thanks.


  15. Hi,
    I am in process of building an RV garage here in the Phoenix, AZ area and looking to install a couple of mini-splits. I have had a couple of a/c companies come out and give quotes for 2 24k BTU units saying that that would be more than enough cooling for an RV garage. Looking at an a/c BTU calculator it shows that I would need larger units, should I listen to the professionals or the calculator?
    The garage is 1803 sq/ft with 14.5 foot high ceilings. There are 2 6’x6′ windows that face north and of course an RV garage door(13’x16′) that faces to the west as well as an 8’x12′ pass through garage door that faces east, both garage doors will be insulated. Garage will be insulated with spray foam insulation.

    1. The professionals most likely performed a Manual J load calculation, which takes all factors that can affect the size of the unit you need into account. We would recommend two 24k units, as well. These units typically cover around 1,000 square feet in a temperate environment, so it seems like they would work well when you consider the other factors that you listed. Check out https://mrcooldiy.com/ for more information!

    2. their calculation of 500 sq/ft per ton is with an 8ft. ceiling max. IMO you need at minimum 2-36k units…

  16. Purchased a DIY 24,000 BTU 20 seer ductless mini split with wireless enabled smart controller. Unit worked great for the summer after initial install. Early fall worked well as a heat pump until the snow arrived. This spring the unit would not heat or cool. Professional HVAC company investigated the issue. Found major pipe failure inside the compressor unit. Obvious factory defect in piping or assembly.

    I’ve made no less than 15 calls to all the extensions at Mr. Cool. Does anyone answer the phone in customer service or do all incoming calls dump to voicemail to be lost forever? CAN SOMEONE PICK UP THE PHONE?

    1. I just found out the there was sever storm in the Mr Cool headquarters area back in December of 2021. While I do apologize for not knowing about the tragic weather incident.

      If you’d be willing to add something to the voicemail message it might identify why there is no customer support or minimal customer support.

    2. We apologize for this. Would you mind sending a reliable contact number and your name so that I can relay it to the service team? This information will not be made public.

  17. We’re having the same issues as so many who’ve commented. No one returns calls. Our unit worked great when new last July. It couldn’t keep up in January but it was pretty cold. We opted to turn it off for the winter. Then, in late April, it won’t heat. No one returns calls, nor emails. Techs up here aren’t sure how to service our unit without voiding the warranty. We’re discouraged and, to say the least, growing more frustrated with each day that passes. Please help.

    1. We apologize for this. Would you mind sending a reliable contact number and your name so that I can relay it to the service team? This information will not be made public.

  18. I have tried calling several times across several days but have not been able to reach anyone. After waiting in queue, it forces me to leave a voicemail. Can you please advise on some way to get in contact for tech support or to submit a warranty claim?

  19. I ordered the 27,000 BTU 2.25 Ton 3-Zone Ductless Mini-Split Air Conditioner and Heat Pump with 25 ft. Install Kit, 230-Volt/60Hz from Home Depot, but need to get couplers and extra line sets. Nowhere in your installation instructions does it mention the line set sizes that come with this system. I’ve called and emailed numerous times over the past 2 weeks. Can you please provide an answer of which size line set match this kit? Apparently your customer service is nonexistent. I’m almost at the point where I’m about to take the damn things back to Home Depot and go with another more responsive brand.

    1. Liquid pipe and gas pipe sizes for the this system are listed on page 24 of the manual. It may depend on what BTU capacity your air handlers are, as well.

  20. I was wanting a Mr cool but I have seen nothing but bad reviews on ur system. Now I’m confused on what system to buy. I don’t want to spend 6000 with bad reviews can u clear this mess up. They say no one replies and it has 5 year warranty.

    1. We apologize greatly for this. We are experiencing a high call volume and we’re working on getting back to everyone as quickly as we possibly can. We try to do our best to get back to customers, but this high call volume may result in unappealing callback times. We are constantly working towards improvement, though! The DIY ductless mini-split has a 5 year parts and a 7 year compressor warranty. If you get the 4th Gen and sign up for the MRCOOL Care Kit (coming soon), you’ll be eligible for a Limited Lifetime compressor warranty.

  21. Hello
    Is there an owners manual for the universal 2-3 ton heat pump with details such as target sub-cooling and super heat? If so please share a link to it.
    I may have some issues with how it takes more than an hour to get to a target temperature in cooling mode.
    Thank you

  22. For anybody looking to buy a new product , please do yourself a favor and call the support number first. If you are able to get a tech support personnel on the phone, you could consider buying the product.

    1. We apologize greatly for this. Would you mind sending me a reliable contact number so that someone from our service team can reach out? Your personal information will not be made public.

    2. I purchased a 12K DIY unit. On it’s second day it stopped working with error codes. I’ve made multiple calls, sent multiple emails and a week later I’ have not been given the support to diagnose the problem, and get replacement parts. One customer service rep told me it was his 1st day on the job. I can’t use our bonus room since it’s too cold.

      The local HVAC contractor will not touch it, and commented he doesn’t understand why he must be licensed and trained to handle a system with refrigerant and a homeowner can.

      If I can’t get a fire lit under somebody’s butt in Kentucky, I’m going to rip it out and bring it back to Lowes as a defective item for a refund and pay an HVAC contractor to put in a split from a reputable manufacturer . Then I’ll contact everybody from Lowes corporate management to the BBB to my state attorney general and contractor licensing board (and whoever else I can think of) and let them know I’m not the only consumer with these problems.

      My contact information was provided in the fields when I made this post, but my email is [email protected].

      1. I apologize greatly for your experience. I’ve sent your information to the service team manager, so someone should be in contact with you soon.

  23. Hi,
    I purchased a 4 zone mini split system by Mr Cool from home Depot in May 2022. I had it installed by a friend who is very knowledgeable about these kinds of things. ( Kind of saddened that I cannot get the rebates as he’s not a licensed HVAC person, even though it’s a self install system, seems kinda odd)
    Anyhow everything is working fine except one unit is showing 88 on the outside of the unit, this unit is cooling great. But the unit in the master bedroom isn’t cooling at all. I had been in touch with Heather and she was helping me and sent a new line set through, we installed the new line set and it’s still not cooling.
    I need to find out if I can return this one unit to be switched out via home Depot???????!!!!!!
    If I can get this unit exchanged and running properly everything will be great.
    Please, please, please, please can somebody get back to me.

    1. We apologize greatly for this. Would you mind sending me a reliable contact number so that someone from our service team can reach out? Your personal information will not be made public.

  24. I am having trouble with the refrigeration line hookup. Do you have a technician near Sebastian Florida?

    1. Since there are knockouts in the air handler’s casing, the line set can exit the side of the air handler. Please be extremely careful when doing this and take care not to bend the line.

  25. Have called and called about a problem with my new mrcool unit, and nobody will return my calls. Spent alot of money on this unit and it doesn’t work. Fed up with your games.

  26. Hi there, I have a bad control board for the air handler HAH14024. I think it is still in warranty. I called 270-366-0457 but not response. How can I get a replacement part?

    1. We apologize greatly for this. We are working through all calls that we get, although we were recently hindered by inclement weather. Please continue to call at 270-366-0457. You can also send us an email on our contact page.

  27. I am already a bit unhappy that I purchased a Mr. Cool. I called for some simple info and questions regarding the unit I purchased and was told that because I am not a licensed installer, they could not answer my questions. I pressed a simple question concerning the protective shipping leg on the blower motor and was put on hold and ignored. After 15 minutes I hung up.
    HVAC installers have priced their work way beyond and affordable solutions. I got quotes of 8k to 9k to install a furnace that parts and all would come to less than 3K. A one day install to replace a furnace costs 5k to 6k dollars in labor? I will do it myself for that price. So, DIY’ers are punished with no support and voided warranties. Nice work Mr. Cool and the HVAC community. It is BS.

    1. We apologize, but the only product that we consider to be do it yourself is the DIY Ductless Mini-Split, because it is specifically designed for amateur installation. There are many precautions that must be taken when installing a system like a gas furnace, and doing so incorrectly could end tragically.

  28. Magnus,
    I normally wouldn’t bother you with these issues but I have gotten no resolve using your normal Customer Service and Tech service avenues. In October of 2022 I contacted one of your Sales Representatives (Green Building Technologies) about your Mr Cool Heating/Cooling Units. After discussing the product, I gave him the dimensions of my shop 15’ x 34’ x 12’ as well as an upper storage unit that I wanted to Heat/Cool. This upper unit is 14’ x 24’ x 8’. (GBT) recommended a 18,000 btu Condenser with 2-9,000 btu Wall Units. I agreed to purchase these units and took delivery about 2 weeks later. I installed these units and everything went well. When the temperatures started to drop, the Mr Cool units could not keep the shop warm. If outside temperatures were 32 degrees, my shop would be around 45 degrees. I used a torpedo heater to warm up the room to 75 degrees and then set the Mr Cool to 75 and it immediately started loosing temperature. I contacted Customer Support who then referred me to Technical Support(Ashley Hawkins). She wanted me to get pressure readings off the Condenser. I hired a HVAC Professional to get these readings. Standing Pressure was 225psi and running pressure was 650 with both wall units running. Ashley said everything was running as it should. I did some measurements and the unit was pushing 91 degree air out of wall unit and ran continuously but could not maintain 70 degree temperature in the shop. My sales representative scheduled a conference call with a gentleman by the name of Daniel Alvey and a Technical Rep from Mr Cool. After some discussion, the Technical rep determined I purchased to small of a unit for the size of space I was trying to Heat/Cool.
    My disappointment is that I had to buy this unit through a sales representative, he recommended the size and now they are telling me this is my problem and I need to purchase a 34,000 btu unit. As a DIY product, consumers need to rely on the sales representatives to give us(consumers) the recommendations for your products. In defense of my sales representative, while I was doing some legwork prior to our conference call, the Mr Cool btu calculators on the various Mr Cool websites do not even ask for a wall height when calculating the btu needs. This is a important factor as the difference between an 8’ wall and a 12’ wall is significant and would require a larger unit.
    During our conference call, I asked the Mr Cool representative to provide me with the size condenser and wall units that I need and I will pay the difference between what I purchased and what the larger units cost. Daniel Alvey and my sales representative said they would get back to me. Everything has gone silent since then.
    Being a previous business owner, I always tried to resolve issues with a win-win solution between my customers and my company. I am not getting a warm fuzzy feeling your sales reps are working for the same goal. That is why I sent you this message. I shouldn’t have to buy a complete new system because I used the sales reps recommendations. If I have to buy another full unit, I certainly wouldn’t buy another Mr Cool and take a chance I get screwed again. I very much liked the idea of the DIY product and I was saving about $1500 as compared to having a HVAC Provider install a Mini Split unit in my shop and storage area. Unfortunately, so far I have spent $500 on the HVAC Tech to take the pressure readings, conference a call with Ashley Hawkins and other items he did at her request. The DIY savings are dwindling quickly. At this point, my Mr Cool has been shut down, at the request of my sales rep because it isn’t doing any good. I have to depend on a Torpedo Heater when I work in my shop.
    I have had about 5 individuals stop over at my shop when they saw the Mr Cool Condenser outside of my shop because they were interested in looking at these units for projects that they have. So far I have not had very positive reports for them but they are waiting to see how this is resolved. I sure would appreciate any help you could give to get this resolved. Feel free to give me a call at the number below.

    1. I apologize greatly for this. I’ve sent this message and your email to our service team manager, so someone should be in contact with you soon.

  29. I have had no heat since mid November. I am a contractor and was testing your system on our office before purchasing larger systems for my customers. I have provided everything about the unit, including pictures. I have run all the testes and it has been determined that the unit has to be replaced. I have sent the serial numbers of the unit, the date amount and place of purchase but can not provide the actual receipt. I am well within any warranty on your systems but have been told that you can’t provide the replacement unit. This makes no sense. I cant believe that a company of your size does not have the ability to track your units. Nor why would I have wasted this much time trying to get this fixed. Your customer service has a lot to be desired. I have waited on hold many times for up to 15 min. to be told oh leave a message. Not happy and really need heat.

    1. I apologize for this. I’ve sent this message and your email address to the service team manager, so someone should be in contact with you soon.

  30. Hi Magnus
    I have been working behind the scenes creating a program where a large part of my project would be
    utilizing your products in the Pacific Northwest. Then I read through this forum and am very disappointed
    by all the negative reviews. I was very inspired by the North Dakota video on YouTube and have done extensive research where until today your split systems were my perfect solution. My program projections could utilize
    as many as 100 of your units each month. Please give me some hope that you are working on getting your
    customer service up to speed? My demand will not begin until next Spring so there is still time to eliminate
    the “bugs” regarding products and installs.

    1. Hi Mimmi,

      Thank you so much for your message to us. We recognize the current complaints mentioned in our negative reviews, and we are working our hardest by making active improvements in order to fortify our customer service department.

      We hope to give each and every person the attention they deserve any time they need to contact us.

      We greatly appreciate your interest in us!

      Thanks again,

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