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April 30, 2024

Preventative AC Maintenance Checklist

April 30, 2024

Preventative AC Maintenance Checklist

As the saying goes, an ounce of prevention is worth a pound of cure. This holds especially true when it comes to your air conditioner.

Regular HVAC maintenance can prevent an uncomfortable and even dangerous breakdown in the middle of an August heatwave. What’s more, it can save you money on emergency repair costs and monthly energy bills. 

The best time to ensure your AC unit is up to snuff is before the heat hits — but the second-best time is now. So where do you start? In this post, we cover the most important tasks for any AC maintenance checklist.

Replace Filters Regularly

Perhaps the most essential part of air conditioner care is regularly replacing your filters. Dirty or clogged air filters can wreak all sorts of havoc, including the following:

  • Restricting airflow, which lowers the cooling capacity of your system 
  • Reducing efficiency, leading to increased energy consumption
  • Lowering air quality, allowing more dust, pollen, and mold to circulate
  • Increasing wear and tear, causing more frequent breakdowns

As a general rule, experts recommend checking and replacing air filters every one to three months. You may need to change yours more or less often, depending on factors like the following:

  • The number of people in your household
  • Whether you have pets
  • Where you live (for example, polluted or dusty areas may require more frequent changes)
  • The age of your HVAC system and equipment
  • Whether anyone in the home has allergies or other respiratory conditions
  • How often you use your AC and your home (for example, vacation houses may need less frequent changes)

Clean Condenser and Evaporator Coils

Your AC unit works by circulating refrigerant throughout the system. Indoors, the refrigerant in evaporator coils absorbs the heat from the air. Outdoors, a fan blows over the coils to release the heat from the refrigerant. If either of these coils gets dirty, it can impair heat transfer, reduce cooling efficiency, and increase energy consumption.

As part of your cooling system upkeep, you should clear leaves and other debris from the condenser unit outside. While you can also clean the evaporator coils yourself, that is not always as simple. Indoor coils are attached to a furnace and may be located in a basement, crawlspace, or attic.

Professional AC technicians have the tools and expertise to clean your coils without damaging them. You can ensure optimal performance by scheduling annual AC tune-ups, which may include the following: 

  • Cleaning dirt, debris, and blockages from the coils
  • Inspecting for holes, bends, and cracks
  • Checking for refrigerant leaks
  • Acid-washing particularly dirty coils

Inspect and Clean Air Ducts

While refrigerant flows through your AC system’s coils, air flows through ducts in your walls and ceilings. Dust, debris, pet hair, pollen, and other contaminants accumulate inside your ductwork over time. As dirt builds up, you may experience reduced airflow, poor indoor air quality, and higher utility costs.

You can reduce the amount of debris in your ductwork by reducing clutter in your home, vacuuming floor vents every six months, and changing air filters according to manufacturer guidelines. 

Every three to five years, you should also schedule a professional duct cleaning service to ensure the efficient operation of your HVAC system. You may want to call for service sooner if you notice air leaks, torn pieces, spots of mold, damp areas, large amounts of debris, or eroded duct tape in or around your ductwork.

Certified HVAC specialists will do the following:

  • Inspect your air ducts for leaks, blockages, and proper seals
  • Use a powerful HEPA-filtered vacuum to clean your ductwork, as well as other important components like your evaporator coil, blower, and vent covers
  • Blow compressed air through your AC system to eliminate all traces of dirt and dust
  • Clean all of your vents

Check and Calibrate Thermostat

Another key climate control maintenance task is calibrating your thermostat. Even if all your AC components are well maintained, a faulty thermostat can cause the system to malfunction. Calibration issues can produce erratic cooling cycles, inconsistent temperatures, and higher energy bills.

To check the calibration, simply tape an accurate thermometer next to your home’s thermostat. After 15 minutes, compare the temperature readings on each device. If they vary by more than three degrees, it may be time to call for professional air conditioning service.  

Schedule Annual Professional AC Maintenance

There are many tasks you can and should do as a homeowner to keep your HVAC system running smoothly. However, these are no substitute for scheduling annual professional AC maintenance. Besides the items on the checklist above, licensed technicians will assess the following: 

  • Refrigerant — Inspect refrigerant lines, check refrigerant levels, and test for leaks
  • Condensate drains — Inspect drain lines and pans for debris and cracks to prevent water backups
  • Electrical — Inspect electrical wiring, tighten all connections, and check for exposed wires
  • Lubrication — Lubricate all moving parts, including motors and bearings where needed
  • The system controls — Ensure your AC is starting, cycling, and turning off properly
  • AC leveling — Make sure the ground hasn’t shifted beneath your outdoor unit, causing it to break or disconnect
  • Supply/return differential — Ensure the temperature difference between supply and return vents is within the ideal range
  • Motors — Inspect and test the compressor, condenser, and blower motors for wear and tear and proper operation

Expert AC maintenance can help keep your system operating at maximum capacity while preventing unexpected breakdowns. In addition, it can save you on both repair costs and energy bills.

A bonus? It may help you maintain your warranty. Many HVAC units come with a manufacturer’s warranty in case parts don’t last as long as they should. However, the fine print often includes a requirement to have your unit serviced annually by a professional HVAC technician.

Want Expert HVAC Help? Contact Comfort Squad Today!

Whether you’ve reached the end of your DIY AC maintenance checklist or you’d rather leave it all to the pros, contact Comfort Squad today. We are ready to handle all your HVAC needs in the greater Houston area.

From AC maintenance and repair to furnace replacement and home energy audits, we can do it all! Call us today at 281-908-2100 to schedule service. 


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Comfort Squad

Heating & Cooling


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dan N.
1718741141
Joseph Le my technician was very thorough and made sure my unit is working the way its supposed to. Comfort squad has always been a pleasure when servicing my home!
Juan G.
1718729344
Young man was very professional, a knowledgeable and did his job as expected
Ryan L.
1718662333
☆☆☆☆☆Thank you to Joseph Le with Comfort Squad heating & cooling for making my life very comfortable at home with the two new AC units! I finally get a real company for all of my Heating and cooling needs. They are the REAL DEAL. Straight forward and no Red tape! He was very thourough with everything and made my tune up process very easy! Thank you so much!☆☆☆☆☆
Roberto E.
1718643726
Went into great detail on AC unit. Checked everything
Paul D.
1718407582
Joseph Le did an OUTSTANDING job. Professional, prompt and affordable.
Noe F.
1718300962
Joseph was phenomenal! He came out and was very thorough and did an amazing job. Call Comfort Squad for all your AC Needs!
Norma F.
1718232357
Joseph was excellent
John G.
1718215277
Technician Joseph did an awesome job servicing my AC unit. He was very informative and thorough in his service.
Evelyn Q.
1718138128
I had a Cooling Tune-Up and Performance Inspection done today at my home. Joseph was PHENOMENAL, he explained everything in detailed and he went above and beyond. Joseph and Comfort Squad has ⭐️⭐️⭐️⭐️⭐️ if you need any maintenance or a new unit contact Joseph at Comfort Squad.
Aaron B.
1717719446
Very professional service from Joe our technician. We recommend Comfort Squad for quick professional and clean service.
Carlos A.
1717538520
Francisco and Joseph comfort squad techs, were very professional and extremely polite and clean after himself in the work area. It's rare companies clean after they are done. All the employees always keep you informed of the process. The time it will take them and always put on shoe covers when entering your home. Been hiring them since 2018. The ac company are endless but I never had a bad experience with comfort squad.
Angelina G.
1717534529
The technician was very knowledgeable and helpful!
Renee T.
1717520192
Joesph has been awesome. Took photos to explain what he was doing. Explained in detail.High recommended
Mehdi Q.
1717015205
Great service. Joseph was very thorough.
Anchalee R.
1716923549
Joseph was awesome, very fast and super friendly. He was prompt and definitely got everything done in such a timely manner. I’m highly satisfied with his work.
Christina C.
1716908763
Joseph was very efficient and thorough! He did a great job, cleaned up, and explained everything very well.
Michael W.
1716834971
These guys are top-notch. Been working with them for the past four years and I can't say enough about them. My most recent appointment was with Francisco and he's extremely knowledgeable and was as friendly as all the other technicians I've worked with over the past four years.A one hundred percent recommend the Comfort Squad!
Chirag R.
1716825308
Eric Ramirez has been maintaining our units for past few years and they work smoothly. Eric is detailed and diligently works through all steps explaining everything, thank you Comfort Squad!
Mike B.
1716663800
Awesome service! Carlos was very thorough and explained everything! I highly recommend!
Paula B.
1716658099
Joseph did a very good job.
Carolyn D.
1716589663
They were courteous…finished the job fairly quickly.
Cadance W.
1715881302
Great service and honest
Lisa M.
1715869956
These guys are so professional and extremely knowledgeable. I would recommend this company for no other reason that their technicians are amazing.
Mark H.
1715606859
Great people, honest and very easy to work with. They never try to sell you something you do not need. Recommend for any new system purchases.
David G
1715364660
Erik showed up. Did a terrific job. Good conversation. I like it when the technician talks and explains things. I always did when I was a technician at my job. You should always be able to talk and work at the same time because customers want that these days. Okay not all customers but a good majority. Check the outside took the unit completely apart so that the coils could be cleaned correctly vacuumed out all of the leaves in the bottom of the unit. And of course before he did all of this he checked the unit to make sure it was running properly with the correct amount of freon in it. After he was finished doing the outside he came in the inside and checked the blower wheel and the coils. Found a little bit of mold in the distribution box. Offered to sell me a UV light and a new for about $1,500, but I just don't believe that the mold is that much of an issue yet. I feel like that should have been offered when the unit was installed back in 2018 if they knew mold could be a problem on coils. I may look at adding my own UV light to the Box after doing some research.Although at this point let me tell you I like being informed. That may not be for everyone. But I want to know what's happening. I don't want to find out several years from now that I should have done something.Now at least I know to keep an eye on it and I'll watch it over the next 6 months and it gets really bad then I will consider putting a professional light in there I know they make some pretty neat ultraviolet lighting.The other thing I like about Comfort Air is the fact that it's a family-run organization. It hasn't become a huge faceless Corporation. And they take care of you like family. I can tell you that when I had my AC system installed a number of years ago I did look at other companies. And Edgar- God Rest his soul- gave me the best deal. And you know what he didn't give me the cheapest air conditioner. He gave me the air conditioner I needed to take care of my residence. And he was still competitive with anyone else out there. Comfort Air they are good people that can be trusted to take care of you correctly whether it's a new air conditioner or whether it's Servicing an air conditioner you already have.
leslie K.
1715197654
Comfort Squad has got to be the best air condition/ heating company in Houston. Their technician, Francisco Nino proves to be highly skilled and professional. They're clean, neat and orderly. I highly recommend Comfort Squad for all of anyone's a/c and heating needs.
Joe A.
1715016980
Very professional. I received good advice and possible solutions. Erik was very courteous and respectful.
Toya A.
1714853463
Erick was amazing. He did magic on my a/c . I would definitely recommend.
Jeffrey W.
1714605574
Service was amazing!! Tech was very professional and explained everything along the way.
bran E.
1714524606
All I can say if you want honest expert service then comfort squad the A/C company to get. Erik is top notch technican very professional.
David N.
1714502311
Very reliable and fair pricing
Ken B.
1714425215
Always on timeAnd very thorough
Christela M.
1714420279
Great company
Beth S.
1714238890
Carlos P. was very thorough in his inspection of my A/C units (inside and out), changed the filters, installed UV lights and helped address and come up with a plan to reduce the humidity in my house. He arrived on time with a smile and was very professional. Thank you Carlos and Comfort Squad!
Andrew S.
1714153325
Very professional, completed a/c tune up
Jonathan L.
1714068129
Carlos came out to my house for a cooling system tune up. He arrived on time and was very professional. He was very thorough and took time to explain everything he was doing. Definitely recommend this company.
Pallavi R.
1714066695
The Comfort Squad is phenomenal! They have helped us with our heating and cooling needs for the last 3 years and continue to oversee our home’s energy needs. The team/squad is extremely professional, efficient, detailed and thorough with their work! I/my home definitely recommends them 👍🏽👍🏽
Joseph B.
1713997820
Excellent communication. Text and email to confirm appointment, remind the day before, and alert when technician is on the way. Technicians are courteous, knowledgeable, thorough, and professional. Make extra efforts to keep your house clean, e.g., wear shoe covers, place a mat underneath folding attic ladder, etc. I highly recommend them.
Dwine F.
1713886714
Everyone was courteous and you very much have a blessed day
Maggie A.
1713825291
Francisco is always friendly and shares all info about my system. Great company
JackieMarcus C.
1713815113
Service is always great and on time. Every time I get a thorough explanation of what's going on. Kudos to Francisco!
Marnie I.
1713812929
Comfort Squad installed a new unit and ducts for our home a few years ago. Great service and their technicians are very knowledgeable and helpful. Their monthly maintenance program is worth it!
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