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Air Conditioner Maintenance – Do’s and Don’ts

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Keeping these basic rules in mind when dealing with your AC unit will not only ensure that it will function effectively, but it will save you money and keep your home comfortable.

It may still be chilly in and around the St. Louis area, but warm weather will be here before we know it. This means you’ll be turning on your air conditioner soon. Air conditioning is a necessity in most homes, as it keeps indoor air at an optimal temperature, ensures airflow and controls the humidity levels in your house.

Modern air conditioning systems are designed to be user-friendly and even have a self-diagnose function to keep air conditioning repairs to a minimum. But, regular maintenance is still needed by any system.

Here is a thorough list of the most common do’s and don’ts of maintaining your HVAC system.

Amy K.
2 days ago
Giovanni was very professional, helpful, patient and helped me figure out the issue, if it was covered under warranty, and next steps. Great overall experience and much appreciated.
Response from the owner:Thank you, Amy! We're glad to hear that Giovanni provided you with such professional and helpful service. Your appreciation means a lot to us!
Joe G.
4 days ago
Always professional and thorough whenever they service our home. We have used Thomas Hoffmann Air Conditioning & Heating multiple times since we moved into our home and will continue to use them in the future.
Response from the owner:Thank you for the thoughtful review, Joe. We appreciate you and your business!
Daniel D.
5 days ago
Met Nick at ACCA - conference for HVAC contractors. He’s an expert! 100%
14 years in the business, doing a great job and service.
Response from the owner:Hi Daniel! So happy to hear you enjoyed Nick's company. We are lucky to have him.
Kelly R.
2 weeks ago
Very easy to work with. Technician kept me informed about what was going on through the whole process.
Response from the owner:Thank you for the great review, Kelly! We appreciate your business.
Jordan P.
2 weeks ago
Nick was awesome! He was extremely professional and answered any questions I had. Would highly recommend!
Response from the owner:Thank you for your kind review, Jordan! We are happy to hear you had a great experience using Thomas Hoffmann.
Jill P.
3 weeks ago
Got the job done fast and explained every step as it was happening!
Response from the owner:We are happy to hear you had a great experience! Thank you for the kind review.
Veronica V.
1 month ago
We have a tankless water heater that needed cleaning and a new part, they came out very quickly and got the hot water back again. Thank you!
Response from the owner:We are happy to hear you had a pleasant experience! Thank you for the kind review, and your continued support.
jay70001
2 months ago
0 stars if I could. Bought a faulty (not to mention overpriced) surface igniter, called back five minutes later after installing, of course they didn’t stand behind their part. Go to Grainger instead. Same (working) part, half the price.
Response from the owner:Hi there. I am unable to locate your customer profile. Please give our office a call at 314-471-7625 so we can get this figured out for you.
Katherine T.
2 months ago
Always a great experience. Was able to get out same day to help, knowledgeable of old homes, including their systems and new systems as well.
Response from the owner:Thank you for your kind review, Katherine! We appreciate your business.
Frank P.
2 months ago
From the phone to the completion of the job everyone is so polite and informative. I had Giovani as our representative and he was very informative and professional, and knew exactly what the problem was. Thanks so much.
Response from the owner:Thank you for the kind review, Frank! We appreciate you and your business.
April T.
2 months ago
My furnace was not working. A very nice gentleman came out this morning and fixed the problem and now I have much needed heat. He was very professional and courteous. I will definitely be using them again when the need arises.
Response from the owner:Thank you for the positive feedback! We're glad to hear that you were pleased with our prompt and friendly service. We look forward to assisting you again in the future!
Kathleen D.
2 months ago
Ryan was very professional, knowledgeable, and thorough. I was able to get an appointment the same day during a biter, snowy day.
Response from the owner:We are so glad to hear you had a pleasant experience, Kathleen!
Melinda D.
2 months ago
I will always call Hoffmans for my air and heat needs. They were out to my daughters house that day and fixed it. It was right before the weekend storm with below zero temps the next day. They saved my daughter and grandbabies. I could never thank them more.
Response from the owner:We are so happy to hear that we could help! Thank you for the kind review.
Scott S.
2 months ago
Snow and drifting snow covered intake and out take vents causing the furnace emergency to shut off furnace. Cleaned off the driftibg/ snow off roof and vents furnace works perfect now. Thank you and great job Nick.
Response from the owner:Thanks for the great review, Scott! We appreciate your support.
Jessica B.
2 months ago
Came during a storm with emergency call for heat- did a quick and fast job getting furnace running! Whoot!
Response from the owner:Thank you for the great review, Jessica! We appreciate your support.
Jennifer H.
2 months ago
5 stars! Nick was here to fix my heater within 2 hours of my call. He explained the problem to me thoroughly and got the job done quickly & professionally. Thank you so much!
Response from the owner:Thank you for the kind review, Jennifer! Glad we could help.
Matthew B.
2 months ago
Extremely thorough and educational. They do a wonderful job of explaining everything and making sure I was comfortable knowing how the systems worked in my house!
Response from the owner:Thanks for the great review, Matthew! We appreciate your support.
Joe C.
2 months ago
Nick did an amazing job, on time, very knowledge and professional.
Response from the owner:Thank you for the great review, Joe. We look forward to servicing you in the future!
anna M.
2 months ago
installed humidifier and hepa filter. Very pleased with service.
Response from the owner:We are happy to hear that you had a pleasant experience!
Abby C.
2 months ago
I noticed a strange noise that I was concerned was linked to my furnace. I called Thomas Hoffman Heating & Cooling and Nick came right out. He was very thorough checking all components. Thankfully all checked out for us this visit. Definitely recommend Thomas Hoffman Heating & Cooling!
Response from the owner:Thank you so much for the kind review, Abby! We appreciate your business and look forward to servicing you in the future.
DA O.
2 months ago
I would describe the overall experience as professional, but also kind and responsive from the initial phone call to the technician.
Response from the owner:Thank you for your kind review! We appreciate your business and look forward to helping you in the future.
Christine G.
2 months ago
Thomas Hoffman is a wonderful company to work with. Techs are knowledgeable, personable & efficient.
Response from the owner:Thank you, Christine, for your kind words about our team; we appreciate your feedback and are glad to hear you had a positive experience!
Breanna H.
2 months ago
Nick was amazing. He came out the same day and had our heater fixed quickly
Response from the owner:We are so happy to hear you had a pleasant experience with us!
Dawn B.
2 months ago
Hoffman plumbing came out to help with some of my plumbing problems. They were amazing. I wish I would have called them first
Irene A.
2 months ago
Nick did a great job!
Response from the owner:We're happy to hear you had a positive experience!
j. R.
2 months ago
Got a quote over the phone. Everything was explained thoroughly. Dakota, my technician arrived and on time, was very professional and knowledgeable. He didn’t try to upsell or change anything. He did a great job. We can already tell the difference since the ducts and vents were cleaned. Would recommend an use Hoffman again in the future.
Response from the owner:Happy to hear you had a pleasant experience using Thomas Hoffmann!
Craig M.
3 months ago
The technician, Ryan, was knowledgeable and helpful in identifying the issue with our mini split AC unit. They are the second company we called after issues with the first and will be using Hoffmann again.
Response from the owner:We are so happy to hear your experience with Thomas Hoffmann was pleasant. Thank you for your kind review, & we look forward to working with you in the future!
Jim S.
3 months ago
woke up to a very cold house, called Thomas Hoffmann, they were able to come out a couple of hours later and get the issue resolved. Always trust them, they have always been quick to respond and get either the heating or ac issue fixed that day. Also a great price!!!! give them 10 stars if i could, Thank You JS
Response from the owner:Thank you for the kind review, Jim. We are happy to hear that you had a positive experience working with Thomas Hoffmann!
Hank K.
3 months ago
Fast, friendly, professional service.
Response from the owner:Thank you, Hank, for your wonderful feedback; we're glad you enjoyed the fast, friendly, and professional service, and we'll be sure to keep up the great work!
sampaul R.
3 months ago
The technician Giovanni was excellent and on time very professional and efficient and knowledgeable of the project at hand ,gave great advice but most of all did great work 👏 thank you .
Response from the owner:We are so happy to hear you had a great experience, Sam! Thank you for the review, and thank you for your business.
Ann R.
3 months ago
Nick was friendly, professional and knowledgeable, he did an awesome job!!
Response from the owner:Thank you for recognizing Nick's friendliness, professionalism, and knowledge - we're glad you had an awesome experience!
Maureen O.
3 months ago
Notified me of expected arrival time and then again when he was on his way and was exactly on time! Nick was very personable and trustworthy.
Response from the owner:Thank you, Maureen. We're glad to hear that Nick kept you informed and made your experience enjoyable!
Christina G.
3 months ago
Very fast service, Nice young man, and personable!
Response from the owner:Thanks for the great review, Christina! We appreciate your kind words and your business.
Cool Brook I.
3 months ago
Your service technician was very professional and knowledgeable. And did not appear to try to give me bogus information. I truly appreciate his honesty because several other companies did not appear to be honest, obviously wasn’t honest, my gut feeling told me they were not honest and tried to get me to spend $10,000 for a problem that was much simpler to fix. I look forward to you servicing all my properties, and possibly those of the rest of my family.
Response from the owner:Thank you so much for the kind words and great review! We appreciate your support.
Lianne R.
3 months ago
Very prompt, communication was great, and the workers were very polite. I highly recommend them!
Response from the owner:Thank you, Lianne! We're glad to hear that you had a positive experience with our team and appreciate your high recommendation.
Jaden S.
3 months ago
Jeff did an outstanding job. Assessed the situation, found the problem, and fixed it within the hour. Thank you!
Response from the owner:Thank you, Jaden! We're glad to hear that we provided such prompt and effective service. Your appreciation means a lot to us!
Leticia
3 months ago
Water heater repaired, appointment done the same day, effective, courteous
Response from the owner:Thank you, Leticia! We appreciate your kind words and are glad to hear that the water heater was repaired promptly and effectively. Your satisfaction means a lot to us!
Mr T.
3 months ago
The service tech Giovanni did a fantastic job. Our gas fireplace is working like new again so we’re ready for the cold weather!
Response from the owner:Thank you, Mr, for your fantastic review! We're glad to hear Giovanni provided you with excellent service and professionalism. Your recommendation means a lot to us!
Jeff C.
4 months ago
⭐️⭐️⭐️⭐️⭐️ If I could give 10 stars, I absolutely would.

Last night our furnace went out unexpectedly, and with three kids in the house, the temperature dropped fast. Giovanni went above and beyond in every way possible. Instead of charging me a late-night service fee, he simply asked, “Are you decently handy?” and offered to walk me through some troubleshooting steps to get our heat back on so my children wouldn’t have to sleep in the cold.

Not only did he guide me through the process, he even FaceTimed me and showed me exactly what to take apart, how to put it back together, and what signals to watch for. It felt like having a real technician standing right next to me the entire time. Thanks to him, our heat was restored within minutes.

In a world where true customer service is hard to come by, Giovanni is a rare find. It is a guaranteed fact that any future repairs, maintenance, and the new heater/AC system we’ll be needing this coming summer/fall will absolutely be done through him. His honesty, kindness, and expertise have earned our business for life.

Highly, highly recommend.
Response from the owner:Thank you, Jeff, for sharing your experience! We're so glad to hear Giovanni was able to help you and your family during that tough situation. Your recommendation means a lot to us, and we appreciate your trust in our services for the future!
Mary C.
4 months ago
My neighbor referred these guys to me when had water heater problem. Previous company told me I needed to replace it. Tom’s technician fixed it for less than $200. This was over 2 years ago and have been using their service ever since. They are very trustworthy.
Response from the owner:Thank you, Mary, for sharing your experience and for trusting us with your water heater issue; we're glad our technician could help and that you've continued to rely on our services!

DO: Clean Your Air Filters Regularly

One of the most important rules to keep your air conditioning working well is to regularly clean or replace the air filters. All the air that gets inside your house will go through the filters, so you need them to be clean and unclogged all the time. Every manufacturer recommends a certain frequency for their AC model, but if you live in a polluted area you might want to do that even more often.

DON’T: Cover Your Outdoor Unit Completely

One of the maintenance rules that are often misunderstood is covering your outdoor unit during the cold season. Don’t cover it completely and don’t leave it cover throughout the winter. It prevents proper airflow. Covering your unit should only be done during autumn when there’s a lot of plant debris. Make sure to only shield it from above with a breathable material.

DO: Check Ductwork for Leaks

Many homeowners neglect their ductwork system and blame any malfunction on the equipment, but thorough maintenance includes checking the ducts for leaks and other issues.

DON’T: Ignore High Electricity Bills

Your air conditioning unit should be energy-efficient, especially newer models. If you notice your electricity bills going up, don’t ignore the AC unit, as it might be the cause. A lot of malfunctions can lead to poor efficiency and overworking.

DO: Schedule Annual Professional Check-ups

Hiring a professional team to do at least an annual check-up of your AC unit can save you a lot of money in the long run. Many AC problems are not easy to notice in the beginning, but a check-up will bring them out and solve them before they get worse.

DON’T: Attempt DIY Methods to Maintain or Repair Your HVAC System

The Internet is full of handy DIY projects, and many good ideas can be applied at home, but maintaining your HVAC does require a professional’s experience. Don’t attempt DIY repairs or maintenance operations if you are not 100% sure that you know what you’re doing.

DO: Replace the Thermostat Batteries When Needed

This may seem like a trivial issue to mention, but it happens very often. Remember to replace the thermostat’s batteries often, as programming it properly is crucial in your AC’s performance.

DON’T: Leave Your Air Conditioner on 24/7

Don’t rely only on your AC unit for your comfort. It should be put on stand-by from time to time, for its health as well as your comfort. Find ways of regulating your temperature that don’t rely on the AC unit.

Keeping these basic rules in mind when dealing with your AC unit will not only ensure that it will function effectively, but it will save you money and keep your home comfortable for years to come.

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