HVAC Warranty Guide

  • December 23, 2021
  • By MR COOL

Whether you’re renting an apartment, renovating a home, or reinventing a space like a tiny home, garage, man cave, orshe-shed, chances are an HVAC unit has been beneficial to you at one point in time. In most parts of the country, heating or cooling are required to stay comfortable for at least part of the year and in many places, it’s necessary for HVAC units to run every day. Unlike other appliances, HVAC units come with different types of warranties. Wear and tear are common for a machine that’s used daily, but its parts and installation are different from something like a car’s.

For this reason, there are several types of warranties you can get for your HVAC unit. But is having a warranty necessary — and what are the reasons it may be important for you? Read on to explore the ultimate HVAC warranty guide and choose the best plan to suit your lifestyle.   

Why Are Warranties Necessary? 

Many manufactures and appliance companies offer warranties when you buy their products to offer peace of mind. It takes the stress away from any incidents or faulty parts that may come with a new appliance. In the long run, it saves time and energy for the buyer and gives them a better experience with the appliance. 

Specifically, with HVAC units, warranties can be necessary if you expect that you’ll use your unit every day — or the majority of the year. Warranties can last up to 10 years — so even if you’ve had the unit for eight years, you can still have parts or services under warranty without worrying about extra costs. Plus, the new parts will carry out the remainder of the 10 year warrant with some plans. Ultimately, this gives owners a stress-free option of owning an HVAC unit for an allotted amount of time. 

What Are the Main Type of HVAC Warranties? 

Most HVAC warranties promise 10 years for equipment or two years for labor. Rarely will these two types of warranty come together. Therefore, you’ll likely pay for one or the other, depending on which one is the issue with your HVAC unit. Let’s take a look at both types to give you an idea of which one to look into for your HVAC needs. 

Parts and Equipment

Most manufactures require you to register a new HVAC unit in order to receive the full, limited warranty. This will confirm that contractors can perform a warranty service if any part needs repair. Registering can be done online and the coverage period starts as soon as the unit is installed — for new homeowners, the warranty will start on the closing day. Equipment or parts warranties are typically the ones you find for up to ten years.      


A labor warranty is another popular type of coverage for equipment like HVAC units. This just means that the manufacturer will pay for the cost of service it will take to repair the unit. Although this warranty usually has a shorter time limit, it can still be useful as the certified HVAC technicians needed to make most repairs can be expensive. Similarly, this is why it is important to understand what type of machine parts are covered, in case you need to buy the parts under the labor warranty that comes with your air conditioner/HVAC unit. 

What’s the Difference Between an Initial and an Extended Warranty? 

Even though your initial warranty comes at no extra cost when you buy an HVAC unit, some people feel inclined to also purchase an extended warranty. With quality, state-of-the-art equipment and machines from a reputable company, buying an extension on your warranty isn’t always necessary. These deals are either handled through the manufacturer or through a third-party selling the units. 

Getting an extended warranty truly depends on the level of reliability you have with your HVAC units or the experiences you’d had with past products. If you feel as though having an extended warranty will give you a peace of mind and one less thing to stress about, then it’s worth purchasing. An extended warranty will grant you more time to cover the costs of equipment or labor past the date of the original warranty or installation.

What Are Warranty Exclusions? 

Although warranties will cover most parts or labor costs that come with the HVAC unit, there are certain special parts and circumstances that are not included. In many cases, regular maintenance must be maintained in order for the warranty to stay in effect and not become void. However, the things that are not covered tend to be bigger, more long-term or unpredictable occurrences that happen to the machine. Here are a couple of exclusions you may find listed in your HVAC unit warranty.

  • Compressors: These parts are the most expensive parts of HVAC units — they require proper installation and electrical power fluctuations. Warranties can vary when it comes to this particular component because it is so sensitive to the inner working of the system. You may want to ask your salesperson or HVAC technician to clarify whether your compressor is covered.
  • Heat Exchangers: Problems with heat exchangers can be as simple as a clogged air filter or as severe as a rusted or cracked exchanger. They undergo serious wear and tear as they constantly expand when heating up and contract when cooling down. As with many HVAC unit components, it is common for a warranty to cover heat exchanger parts but not the labor needed to replace them, and this is another aspect of your warranty you will want to know in detail.
  • Maintenance Items: Like any machinery, some parts need to be replaced regularly in HVAC units to ensure they work properly. This category includes filters, capacitors, and other small parts within the machine. In particular, these parts are less likely to be covered under warranty because they are not expected to last the entire lifespan of the HVAC unit. Always check with your particular warranty to confirm. 
  • Uncertain Circumstances: Unfortunately, many warranties do not cover the damage caused by natural circumstances, such as storms, fires, electrical surges or other random occurrences. For this reason, along with appliance warranties, it’s always good to have a homeowner’s insurance policy. Most likely, the incidents that are not included in the warranty will be covered by an insurance policy. To avoid uncertain circumstances, always have both and know what each one covers.         
  • A Shift in Ownership: If the HVAC unit is located in a house or townhome, once the property is bought and sold to new owners, the full warranty may not transfer. However, this can easily be fixed as long as the original owners leave the right paperwork. Request a copy of any warranties on the HVAC systems and read over the coverage carefully during the home inspection and before closing on the property. It may be possible for the old homeowner to transfer the warranty to the new owner.

What Type of Warranty Do You Have? 

These are several ways to confirm which type of warranty your HVAC unit comes standard with. If you don’t already have this information, then there are three ways to look up the information that can provide more details about your warranty: 

  • Check the documents and manuals that came with the unit during installation. The paperwork will more than likely have the type of warranty as well as the dates and terms that apply.
  • Search through the manufacturer’s website. If you have a serial number of your HVAC unit, which you can also find on the paperwork or rating plate of the equipment, you can use it to find additional information.
  • Contact your HVAC professional for assistance with your warranty information.  

Why Does an HVAC Warranty Require Sending in a Broken Part? 

It’s not uncommon to have the manufacturer require a broken part to be returned if you have a warranty that covers the cost of the repair, but why? 

Ultimately, it’s a way for them to confirm that the part is faulty. Depending on the results, it will determine who is responsible for the payment of the replacement and repair. If the part is still good but has been replaced already, the contractor will be liable for the cost — and potential penalties. 

Why Doesn’t Homeowners Insurance Cover Air Conditioner Units? 

Although it’s typical for many homeowner’s insurance policies to cover the cost of replacing an HVAC unit, it will not always cover the wear and tear of the machine, unless, as previously mentioned, an uncertain circumstance occurs that results in the unit becoming damaged or broken. Weather-related damages, fire, water, or even theft and vandalism are all probable causes for homeowner’s insurance to cover the cost — or the reimbursement for the HVAC unit. 

The general upkeep and aging of the machine do not qualify it for coverage through homeowner’s insurance because it is not classified as an emergency, especially if the homeowner fails to maintain the system properly and have it checked routinely. For this reason, it’s important to choose an HVAC policy that will allow you to be covered with a long-standing warranty as well as homeowner’s insurance. You never know which one you might need. 

To file a claim with your homeowner’s insurance to get the HVAC unit repaired or replaced, you will need to take some steps. Take pictures of the visible damage, write down the unit’s serial number and model, and collect a police report if necessary. Then, file the claim and meet with an insurance adjuster for the final verdict. If damage is covered by homeowner’s insurance, submit your receipts to receive a reimbursement for the repairs made by the manufacturer or professional. Of course, your individual situation will depend on the details of your policy.     

Will Home Warranties Cover HVAC Repairs? 

Homeowners insurance should not be confused with home warranties — which are usually included when a home is bought and sold to new owners. Home warranties are contracts that generally cover appliances, usually last for a year after home purchase (unless they are renewed), and cover normal wear and tear rather than unexpected events.


If you have a broken HVAC part or system, the home warranty will advise which contractor can repair it. Typically, they will choose newer technicians who have less experience and lower reimbursable labor rates. The homeowner doesn’t have a choice on who works on their unit under a home warranty coverage. 


On top of that, homeowners also do not decide whether or not to repair or replace a piece of equipment. Many home warranties recommend repairing because it will almost always be the cheaper option — even if it ends up being a constant fix. When the part is replaced, they usually pick the lowest cost option available.


Home warranties contain limits on what they will actually cover. If you have one of these plans, read through the paperwork thoroughly to avoid confusion during a stressful situation — like a broken AC in the middle of the summer. The types of HVAC systems most often covered by home warranties include: 

  • Central Air/Heating Systems 
  • Heat Pumps
  • Mini Split Systems

Much like manufacturer warranties, home warranties do not cover weather-related damages or repairs. They require annual HVAC maintenance as well to avoid major repairs or issues that go unchecked. If you have a home warranty, be sure to check the fine print and know exactly what is covered — however, manufacturer warranties are always your safest bet.

Become a MRCOOL Reseller 

Now that you know the ins and outs of owning an HVAC unit under warranty, it’s easy to understand why so many people want to purchase their equipment through a reliable source. MRCOOL offers customizable residential and commercial options and warranties to fit everyone’s needs. 

Thinking about expanding your line of products? Explore our line of HVAC units to see how we make comfort simple. Then, get in touch with our staff to discuss our business options by filling out this simple survey, or contact us through email or by phone at (270) 366-0457


57 thoughts on “HVAC Warranty Guide”

  1. Diy Mr Cool mini split sn:3408904260399240130059
    Having trouble in defrost mode
    Purchased March 20, 2020

  2. I just finished installing you dyi multi unit (4 indoor unit with 36 hp compressor) and I trying to find you warranty registration site. Thanks for the help.

  3. I just bought Mr. Cool from Home Depot. How I buy insurance that covers labor and repair for commercial use/office? Please provide insurance company’s name if possible.

    1. We do not work with any insurance companies to provide insurance covering labor and repairs. You can register your unit for its warranty using the Warranty tab at the top of the MRCOOL home page.

  4. I have called the warranty/service line 5 times, left messages and sent multiple emails regarding a compressor failure. I have not received a single reply. Is this standard customer service? Other than keep calling what should I do?

  5. Need help with filing a claim under warranty. DIY-24-C-HP-230 A
    Serial # 2404092330478140150251
    Date of inst 7/10/18
    Product registration emaile to you on July, 29, 2018.

    Tom Livingston

  6. Hello. I need help enabling the thermostat controls on one of your units. It has never functioned properly. When I turn on the AC and set it for 75, I have to manually turn it off when it reaches 70. when the header is set to 70 during the colder season, it never turns off and something seems to loop in the swivel head portion. I have the DIY-18-HP-230B, I purchased it in March of last year but didn’t get around to installing it until my other AC finally died mid summer last year.

    I also found this odd when someone suggested this as a response. You can also send us an email at https://mrcool.com/.
    That is not an email address, what address was supposed to have been used?

  7. I have called 4 times and left messages including taking to customer service for a P0 error and bad board. No one will call back.

    1. Would you mind sending a reliable contact number so that I can relay it to the service team? I will not make the comment with your information in it public.

    1. Your system can be registered for its warranty under our warranty tab, at https://mrcool.com/warranty/. The warranty does depend on what unit you have, so if you do not have the DIY, the Olympus, the Premier, or the Oasis series mini-splits, hover your mouse over the word “Warranty” at the top, then over the word “Residential” and choose the system that you have.

  8. I just installed a diy unit exactly per the instructions and the outside unit will not turn on. The inside unit powers up and the fan run but the outside unit does not function. What do I do as the website is cumbersome so I am unsure as to the steps I need to take.

  9. Trying to find parts and/or file a warranty claim for my 3 years old DIY 18BTU unit. The reverse valve solenoid seems to be stuck and isn’t moving. Had an HVAC technician came out to measure pressure and everything is good and be determined the solenoid is the culprit. He tried to find a replacement but the unit is discontinued. Do you guys provide parts for your older units?

  10. I’ve called your customer/warranty line multiple times and sent emails and gotten no response. I installed the DIY Multi Zone and the first time I turned it on I got a P1 error code. I followed the error instructions on the video and still nothing! I need somebody to call me back so I can get this fixed.

    1. We apologize greatly for your experience. Would you mind replying to us and sending a reliable contact number so that I can relay it to the service team? The comment with your personal information will not be made public.

    2. I own seven MrCool units. Calling for support used to be very easy and quick. Now, we’re kept on hold telling us we are 4th in line 3rd in line second in line, we’ll be with you in one more minute, system says you’re next in line, it rings and it connects you to…. an answering machine.

      You might want to look into that.

  11. I have a MrCool Olympus Series AC/heat unit.
    My mini split is in my mobile home in Geneva on the Lake , Ohio
    I believe that it is leaking freon because it stopped cooling.
    Would someone please contact me for a service call and to repair the leak if needed ?

    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.

  12. We purchased your split 2 ton upflow system. For some reason we got the horizontal evaporator. We need the vertical. It’s been two weeks. I have called so many times and have sent emails have not gotten one response. Please I’m begging for anyone just to call me back

    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.

  13. Need to register product. Mr cool HAH 14030 serial number sffofdn3LLno72000121 Darrell Fox 4757 Southland Dr Longs SC 29568

  14. Recently bought and installed my DIY unit. Had an electrician come in and wire and a plumber to connect the lines it to insure it was done correctly. Upon turning on the unit I get a P4 fault. Checked with MR COOL to see what it meant. I had the electrician verify the wiring is correct and get the voltage needed. Checked to make sure the lines were open like the video stated. Still does not work. The indoor unit works as a fan, but the compressor does not turn on to cool the air. I need some assistance on where to go. The unit was purchased weeks ago.

  15. If I do a self-installation of a mini split system like the Advantage and have refrigerant charged by a licensed HVAC technician, is the warranty on the system the same as if it was fully installed by a licensed HVAC technician? Same circumstances for Olympus?

  16. I’m trying to register my Mrcool air conditioner but cannot find where to register.
    I have model: MDUCC150**
    It was installed on 8/15/2022
    For residential use

  17. I registered my diy unit. Now 1-1/2 years later the unit is icing up during cooling mode. The evaporator coil is the source. I have left messages with the call line. (No live person will pick up)
    Sent several emails via your contact page. No responses other than the automated acknowledgement that the email was received.
    HOW do WE (your customers) obtain actual warranty discussion and support???

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

  18. I am trying to register a DIY 4 zones mini split. My question is, if I bought a DIY mini split why is the registration form asking for a contractor’s name and phone number?

  19. How do you get a custom service/ warranty question response? I have called the number 5 times now and left a message for a call back, and sent an email with no response. This is honestly the worst customer service I have ever experienced.

  20. I need a new drive board for my parents 4/5 ton unit I installed last year. At this point I don’t care if it’s covered under warranty. It’s the middle of winter and I just want them to have heat.

    1. Actually, just found out they shipped it yesterday! Thank you for honoring the warranty and helping with the trouble shooting Mr. Cool 😎

  21. Hello! I am the property manager for SBG Real Property Professionals. We have a unit that has a Mr. Cool that needs a new control board. The technician said the unit should still be under warranty. How do I go about getting checking on the warranty and possibly getting a new board ordered?

  22. I have called numerous times regarding a p5 code since December 27th 2022. Unit was installed in November of 2022. Been told numerous times that I was on the list for a technician to call every time. Is this the customer service and tech support that Mr cool offers after the sale and the warranty is supposed to be honored after a month of their products being installed. Very disappointed and wish that I would have installed a different brand. Don’t know what else to do.

    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.

  23. My remote control stopped working. I keep calling your customer service line and nobody contacts me back. There is no way for me to turn off the unit. Please help.

    1. There should be a manual control button within the air handler when you open the front panel on the right-hand side. If you press the button three times, it should shut off.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Are you a MRCOOL reseller or installer?
For questions about becoming a reseller or representative call 270-366-0457.

Sign Up