Several signs can indicate that your air handler is not functioning correctly. Here are some common indicators to look out for.
An air handler, or air handling unit (AHU), is a heating, ventilation, and air conditioning (HVAC) system component. It is responsible for circulating and conditioning air within a building or a specific space.
If the air handler isn’t working correctly, contact Thomas Hoffmann Air Conditioning & Heating.
Thomas Hoffman was very responsive to our after hours inquiry, even walked us through some trouble shooting over the phone. We provided pictures of the unit and they were able to quickly buy, schedule and install the part to keep our family warm!
Response from the owner:Thank you, Ali! We're glad to hear that Thomas was responsive and helpful in getting everything sorted out for you and your family. Your feedback means a lot to us!
Nick came by, identified the problem quickly and had it fixed. Great service!
Response from the owner:Thank you, Ted! We're glad to hear that Nick provided you with quick and effective service. Your feedback is greatly appreciated!
Zach was very professional and thorough. He was nice and did a great job!
Response from the owner:We are happy to hear you had a great experience with our company. Thank you for your kind words, Mike!
Great service. Responsive. Well trained technicians. Honest friendly and thorough. I highly recommend Tom Hoffmann and his team.
Response from the owner:Thank you for your kind words! We appreciate your recommendation and are delighted to hear about your positive experience with our team.
Ryan Taylor with Thomas Hoffman did an outstanding job in servicing our unit & explaining everything to me, especially how our humidifier worked, since we were new home owners & had not had one before. Thank you!
Response from the owner:Thank you! We're glad to hear that Ryan and Thomas provided you with excellent service and helped you understand your new humidifier. We appreciate your feedback!
Polite and very efficient.
Response from the owner:Thank you for the 4-star rating, Debra!
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!
Great service and arrived on time when promised.
Response from the owner:Thank you Wray, for your kind words! We're glad to hear you had a great experience and that everything was on time.
Ryan was knowledgeable and figured out why our furnace wasn’t working and repaired the problem
Response from the owner:So happy to hear you had a good experience with the team here at Thomas Hoffmann, Jo! Thank you for your support.
Service was great on time very efficient explained what he was doing changed filter disposed of old filter ! Nice young man 👍
Response from the owner:Thank you, marianne, for your fantastic 5-star rating; we appreciate your support!
Wonderful work. Great communication and always a happy positive technician. Answered all of my questions with sincerity and patience.
Response from the owner:Thank you for the kind words, Bob. We truly appreciate your business!
As always, the Hoffmann technician Zach was polite, professional, and efficient. Pricing is reasonable and even more importantly, they are dependable. I will continue to use Thomas Hoffman A/C and Heating.
Response from the owner:Thank you, Mark, for your kind words about our technician and for your continued trust in Thomas Hoffman A/C and Heating; we truly appreciate your support!
Hoffman is great! Very professional and thorough.
Response from the owner:Thank you, Brandon! We appreciate your kind words and are glad to hear about your positive experience with Hoffmann’s professionalism and thoroughness.
Giovanni was great today! Thanks for everything.
Response from the owner:Thank you, James! We're glad you had a great experience, and we'll be sure to pass along your kind words to Giovanni.
The technician is always on time and very thorough.
Response from the owner:Thank you, Catherine, for your kind words about our technician's punctuality and thoroughness; we appreciate your feedback!
Giovanni was good…. This is reason we ask for him
Response from the owner:Thank you, Pat, for your kind words about Giovanni; we appreciate your feedback and are glad to hear that he made a positive impression.
Our service technician arrived right on time and was professional, friendly, efficient and courteous. We couldn’t ask for more.
Response from the owner:Thank you for sharing your positive experience with our service technician! We appreciate your kind words and are glad to hear that you were satisfied with the service provided.
Ryan was here on time. Thanks for getting here early, as I requested. Very friendly too. It was my annual checkup and all good!
Response from the owner:Thank you so much for the great review, Kay. We truly appreciate your business!
I'm a new customer and had my first appointment for furnace check.My tech was Zack and what a professional. He explained how he checked system and answered all my questions. This was a very good experience
Response from the owner:Thank you, Patricia, for your kind words! We're glad to hear that Zack provided you with a professional and informative experience during your furnace check. Your satisfaction means a lot to us!
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!
I called on December 25th at midnight and started leaving a message and Thomas Hoffman the owner called me back almost immediately. He said he would come out the next morning between 8:00 and 10:00 am snd he was promptly on time. He fixed my problem and while he was there I decided to get an estimate for a new furnace and air conditioning unit. The price was very reasonable and the installers one of them being his son were both very professional very courteous, polite, arrived on time and finished the same day. I enjoy knowing that I now have the support of Thomas Hoffman heating and air conditioning along with the peace of mind that comes with owning a Trane. Nothing stops a Trane.
Albert Koesterer
Response from the owner:Albert thanks so much for your kind reviews and your business. We truly appreciate it!!!
The Thomas Hoffmann team did a great job taking care of our semi annual HVAC maintenance. They not only worked with us to schedule the visit, but also did an excellent job sending us reminders on when they would be out.
Response from the owner:Thank you so much for the great review, Bob! We appreciate your support and are happy to hear you had a great experience!
Nick was excellent. Super profession, quick, and up front with the pricing (which was fair). Hopefully we don't need to call anyone to fix our AC again, but if we do - I'm calling Nick!
Response from the owner:Thank you, Layton, for your amazing review! We really appreciate your support and hope to be your first call for any future repairs!
Same day service. Technician arrived as scheduled. Replaced capacitor quickly. Friendly technician. Repair cost $429 seemed high for inexpensive part and 20 minutes labor.
Response from the owner:Thank you, Tom, for your feedback! We're glad to hear the technician was prompt and friendly, though we understand your concerns about the repair cost. We appreciate your insights and hope to serve you again in the future.
Excellent.
Response from the owner:Thank you so much, Al, for your excellent review; we truly appreciate your support and are glad to hear you had a great experience!
Thank u
Response from the owner:Thank you, Connie, we appreciate your feedback and are glad to hear from you!
Courteous friendly and efficient! What else could you want!
Response from the owner:Thank you, Bob! We're glad you found our service courteous, friendly, and efficient – that's exactly what we strive for!
Thomas Hoffmann is the most professional and courteous of all the HVAC companies in St. Louis. It has kept my HVAC systems in good working order through the hottest and coldest days for many years.
Response from the owner:Thank you, Jonathan, for your kind words about our professionalism and courtesy; we truly appreciate your support!
Quick response time and great to deal with!
Response from the owner:Thank you, Pat! We appreciate your kind words and are glad to hear you had a positive experience with our team.
I notified two companies at the same time regarding a malfunctioning AC unit and Wow! Super fast response from Hoffmann on a weekend no less, to fix our AC unit. Hoffmann’s tech responded to my call immediately and fixed our AC before Galmiche has even responded. Used to be a Galmiche customer, but will use Thomas Hoffmann from here on out!
Response from the owner:Thank you, Darlene, for your fantastic feedback! We're glad to hear that our team was able to respond quickly and resolve your AC issue. We appreciate your trust in us moving forward!
Ryan did a great job with my AC reinstall. Very knowledgeable company with Tom Hoffmann providing the engineering expertise.
Response from the owner:Thank you, Steve! We're glad to hear that Ryan did a great job on your AC reinstall, and we appreciate the shoutout to Tom's expertise. Your satisfaction means a lot to us!
These guy's are amazing same day service very well priced for the knowledge they have ask before doing anything to confirm they're my new go to
Response from the owner:Thank you, Cory! We're glad you found our service amazing and appreciate your kind words about our pricing and knowledge. We're here for you anytime!
They came very fast to fix our AC and service was very good
Response from the owner:Thank you, Maria, for your kind words about our service; we're glad to hear you had a great experience!
My ac compressor was replaced. They always do a good job and they are always available when you need them.I think the price was a little too high since they only had to change the compressor in my unit. The compressor was under the warranty. Other than that Im very satisfied with the job the technician did.
Response from the owner:Thank you, Carlos, for your feedback and for recognizing the hard work of our technician; we appreciate your satisfaction with the job done and will take your pricing comments into consideration.
I was very pleased with your service. Prompt response would was most appreciated. The technician was very knowledgeable and prepared for the work. Also he was very personable and professional.
Response from the owner:Thank you, Richard, for your kind words; we appreciate your recognition of our technician's knowledge and professionalism, and we're glad you had a positive experience with our service.
Nick zeroed right in on the problem with a slight leak and quickly provided a solution.
Response from the owner:Thanks, George, for your kind words! We're glad Nick could quickly address the issue for you.
I have complete trust in Thomas Hoffman AC . I have had multiple
technicians who are always polite and knowledgeable.
Response from the owner:Thank you for your trust in our team, Henry! We appreciate your kind words about our technicians.
Speedy and knowledgeable service!
Response from the owner:Thank you, Zach, for your kind words; we appreciate your support!
Thank goodness for them coming out so quickly. Got our whole job done and we are COOL again. Thanks so much!!!
Response from the owner:Thank you, Sandy! We're so glad to hear everything got done quickly and you’re feeling cool again. We appreciate your kind words!
Had an amazing experience with Thomas Hoffman. They were very professional and solved the problem quickly. I would highly recommend!
Response from the owner:Thank you, Alex, for your wonderful feedback! We're glad to hear that Thomas was able to assist you so effectively. Your recommendation means a lot to us!
Nick was a true expert in explaining our options for a new thermostat.
Response from the owner:Thank you, Robert, for your kind words about Nick's expertise; we're glad he could help you with your thermostat options!
Zac did our service today. A very professional and courteous young man.
He did a thorough inspection and cleaning on our HVAC system.
Response from the owner:Thank you, Tom, for your kind words about Zac's professionalism and thoroughness during your HVAC service; we appreciate your feedback!
I've used these guys twice now and their response time is great, they are friendly, informative, and most importantly, effective. I'm calling these folks every time my furnace sounds weird.
Response from the owner:Thank you for the wonderful feedback, Greg! We're glad to hear that you've had such positive experiences with our team. Providing timely and effective service is our priority, and we're here whenever you need us. Looking forward to assisting you again!

The primary role of the handler unit is to control the airflow and ensure that the circulated air is cool or warm. An air conditioner handler unit is the HVAC system component that conditions the air and determines if the air is circulated well. It features a metal box with heating or cooling elements, a blower, chambers, filter racks, and dampers. Keeping your air conditioner handler unit clean is very important to get the most out of the HVAC system. The air handler unit may show signs of trouble every summer, so it is better to get professional assistance to complete the repairs.
Problems in the Fan Unit
The air conditioner handling unit requires the fan unit to work correctly as it is responsible for blowing air into your building or home. After prolonged usage, this unit might need some attention. Some signs of problems in the fan unit are odd noises from the component or failure to blow air at all. If you experience any of these problems in your HVAC system, you might have to replace the central air conditioner fan.
Condensation Leaks
Condensation leaks are another typical problem that can occur in air conditioner units. The usual signs of an issue are moisture or water leakage at the bottom of the unit. An air conditioner unit has to work a lot harder during the summer, and this causes quite a bit of condensation. This condensation is collected in a pan located under the air handler unit, but at times due to algae formation in the drain line, the line becomes clogged and results in water damage and overflow. Bugs and mice often enter the air conditioner unit and obstruct the drain line.
Contaminated Blower Compartments
If the blower compartment is not checked periodically, it might result in poor indoor air quality. The leaks in the HVAC system may also cause health problems, especially for people with allergies or other respiratory problems. To avoid this problem, it is better to have scheduled air conditioner maintenance.
St. Louis HVAC Maintenance & Repair
Overall, air handlers are crucial in maintaining comfortable and healthy indoor environments by conditioning and circulating the air, ensuring proper ventilation, and controlling temperature and humidity levels. Therefore, it is essential to ensure your air handler if functioning correctly.
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At Thomas Hoffmann Air Conditioning & Heating, we pride ourselves on being a locally owned and operated HVAC company. With more than 30 years of experience and a master technician and mechanical engineer as our owner, we can replace, repair, and maintain your business or home’s HVAC system.