As winter approaches in St. Louis, homeowners know that cold temperatures and unpredictable weather are just around the corner.
Preparing your HVAC system for these seasonal changes can allow for comfort throughout the winter months, no matter how chilly it gets. Scheduling a winter HVAC maintenance service with a trusted technician can help prevent breakdowns during the coldest days and improve your system’s performance.
Here’s a checklist of what a professional technician will cover in a winter check-up for your St. Louis home.
Zach worked fast and answered all my questions with ease.
Thomas Hoffman replaced my water heater. They were effective, efficient and pleasant people with whom to work.
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!
Responsive! Came over, even after hours to help resolve a critical issue that was caused by a lightning strike causing a gas leak. Would highly recommend!!
Response from the owner:Thank you for your kind words! We're glad our team was able to assist you promptly, especially during such a critical situation. Your recommendation means a lot to us!
Having Tom come to our aid was a great experience and he offered followup assistance with the fancy technology part of the appliance if we need it. We will call him again if the need arises. Merry Christmas.
Response from the owner:Thank you, Marilyn! We're glad to hear that Nick was able to assist you and provide follow-up support. We appreciate your trust in us and wish you a Merry Christmas!
They got the job done, we're very quick and very kind!
Response from the owner:Thank you for your kind words! We appreciate your feedback and are glad we could assist you efficiently.
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.
As always, the Hoffmann technician 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!
These guys are pros.
Techs are friendly, listen and explain what they are doing.
Office staff is responsive.
Fast service....
Response from the owner:Thank you, Clark, for your kind words! We're glad to hear our techs and office staff made your experience a great one. Your feedback means a lot to us!
Excellent service. A/C went out on a weekend. Called them on Saturday morning, they were out within about 2 hours. The fix was easy enough, and he even had the part in the truck! I recommend this company for all of your HVAC needs
Response from the owner:Thank you, Elaine! We're glad to hear you received prompt service and that the fix was smooth. Your recommendation means a lot to us!
The service technicians are very courteous and communicate well with the customer. They let you know what, if any, problems are found, the options, and the cost of the repair(s). Quick and efficient.
Response from the owner:Thank you for recognizing our service technicians' courteous and effective communication, we appreciate your feedback!
These guys were great. Quick to return my call. Up front pricing. Great work on the installation. And the installers were nice and friendly. Highly recommend Thomas Hoffmann.
Response from the owner:Thank you, Steve! We truly appreciate your kind words and are glad to hear you had such a positive experience with our team and Thomas Hoffmann. Your recommendation means a lot to us!
Hoffmann came out the same day I called them because our AC was out. The technician, Ryan, was able to get the system running again, was polite and responded to my questions. We’re off to a good start!
Response from the owner:Thank you, John! We're glad to hear Ryan was able to help and that you’re off to a good start with your AC. We appreciate your feedback!
Thomas came over promptly I spoke with him about my concerns with my unit. Immediately got to work trouble shooting and resolved my issues. A+
Response from the owner:Thank you, James, for your kind words and for recognizing Thomas's promptness and dedication in resolving your concerns; we appreciate your feedback!
We have called Thomas Hoffmann many times and they are very prompt and very professional.
Response from the owner:Thank you, Vicki, for your kind words about Thomas Hoffmann's promptness and professionalism; we truly appreciate your feedback!
Super friendly, helpful, and quick to make the fix.
Response from the owner:Thank you, Jack! We're glad to hear you found our service friendly and efficient; your feedback means a lot to us!
Not a customer, but witnessed one of their technicians have an episode of road rage in Clayton. I would be concerned about letting them into my house/business.
We really trust Thomas Hoffman AC and Heating. Nick Hoffman has serviced our units several times now and he is professional, knowledgeable and very easy to work with. He comes on time, so we don’t have to schedule a long waiting period. We would highly recommend this company.
Response from the owner:Thank you, Greg, for your kind words and for trusting us with your AC and heating needs; we’re glad to hear that Nick has provided you with such great service.
We’ve been looking for a locally owned small HVAC dealer for a few years. And we found it with Thomas Hoffmann Air Conditioning & Heating. We love their service technicians. They come on time, they know what they are doing, they don’t upsell you on every appointment and they like working for Thomas Hoffmann. A happy employee makes for a happy customer.
Response from the owner:Thank you, Mary, for sharing your wonderful experience with us; we're glad to hear you appreciate our technicians and their commitment to great service!
I called on a Monday morning as air conditioning was blowing warm air. They were able to come to my house very early afternoon and fixed the problem. Would highly recommend and will use them again.
Response from the owner:Becky thank you so much for your great review. We appreciate your business and your kind words.
quick to arrive and fast service
Response from the owner:Thank you, Connie, for your kind words about our quick arrival and fast service; we appreciate your feedback!
Very good, pleased with service.
Response from the owner:Thank you! We're glad to hear you were pleased with our service and appreciate your kind words.
Excellent service from Nick!
Response from the owner:Thank you, Margaret! We appreciate your kind words and will make sure to pass along your praise to Nick for his excellent service.
I am very pleased with the service provided.
, especially the quick response to my request . The technician came in themorning and had my cooling system repaired within an hour. Thank you !
Response from the owner:We're delighted we could promptly assist you on a Sunday morning and fix your cooling system efficiently. Thank you!
Here on time, worked fast. Always pleasant and great answering questions. Zach always does a great job.
Response from the owner:Thank you, Debra, for your kind words; we're glad to hear Zach made a positive impression and that you had a great experience with our team!
great job
Response from the owner:Thank you, Joe! We appreciate your kind words and the support from everyone involved.
Extremely quick response for appointment and did quick fix for our furnace and heat is working great !
Response from the owner:Thank you for your kind words! We're glad to hear our team was able to respond quickly and get your furnace working great. We appreciate your feedback!
They were timely, polite, professional and they saved us from too much sweating. In a field full of pompous and arrogant technicians, these guys take the time to explain what is wrong and how they are correcting it. Other folks just assume you are incompetent but these folks take the time to educate. Cannot recommend highly enough.
Response from the owner:Thank you for your kind words! We truly appreciate your feedback and are glad we could provide you with a positive experience.
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.
I would like to have a receipt for my payment which I did not receive. On a positive note he was very punctual very early actually he did his job and was very professional and I'm hoping and praying this took care of the issue thank you and I would not hesitate at this time to use your services
Response from the owner:Thank you, Mark, for your feedback and for highlighting the punctuality and professionalism of our team; we appreciate your support and will ensure you receive your receipt promptly.
Our experience with them was fantastic all the way through! Not only were they able to get to our business that day but the customer service from the phone call to the on-site service was professional and quick. We'll definitely be using Thomas Hoffmann Air Conditioning and Heating in the future.
Response from the owner:Thank you, Michelle, for your wonderful feedback! We're glad to hear about your fantastic experience and appreciate your kind words about our team's professionalism. We look forward to serving you again in the future!
Zachary was here on the dot at 8:00am. Thank for making me the first stop as promised. Very friendly too.
Response from the owner:Thank you for recognizing our professionalism and friendliness!
Competence and knowledge have been my experience.
Response from the owner:Thank you, Beth, for sharing your experience; it means a lot to us!
I couldn’t be happier with the service from Thomas Hoffmann Air-Conditioning! From the moment I called, the team was professional, responsive, and truly knowledgeable. Thomas personally made sure everything was handled with great attention to detail. The installation was smooth, efficient, and the quality of the work exceeded my expectations. It’s rare to find a company that is both skilled and genuinely cares about their customers. I highly recommend Thomas Hoffmann Air-Conditioning to anyone looking for honest, reliable, and top-notch service. They’ve definitely earned a loyal customer!
Response from the owner:Thank you, Rick, for your kind words and for recognizing our team's hard work; we're grateful for your support and thrilled to have earned your loyalty!
Amazing service from Thomas Hoffmann! They made space in their schedule to come out the next day to fix our air conditioner. They were on time, honest and fixed the problem on the spot. Thank you!
Response from the owner:Thank you, Ashley! We appreciate your kind words about our team's service – it's great to hear we could help you so quickly.
Excellent Service!
Response from the owner:Thank you, Lynda, for your kind words about our service; we truly appreciate your support!
Fast efficient service. Both of the gentlemen that came to my home were very help and informative not to mention polite. It’s difficult to get service advisers to appear at your home when scheduled most times they’re late or don’t show up at all. Not an issue with this team on time, clear diagnosis, quick repair. I would definitely use Thomas Hoffmann Air Conditioning again. I recommend them highly.
Response from the owner:Thank you, Anna, for your wonderful feedback! We're glad to hear that our team provided you with timely and helpful service, and we appreciate your high recommendation.
Tom was great. Super quick and easy! Serviced my unit in under 24 hours.
Response from the owner:Thank you, Olivia! We appreciate your kind words about Tom and are glad to hear your unit was serviced so quickly.
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.
The OG brother, Thomas Hoffmann, his son Nick, who and the entire team are fantastic! They have my highest respect and recommendation!
Response from the owner:Thank you, Jane! We truly appreciate your kind words about Thomas, Nick, and the entire team; your support means a lot to us!
Fast response and great quality work.
Response from the owner:Thank you for your kind words about our fast response and quality work; we truly appreciate your support!
Very quick and efficient
Response from the owner:Thank you, for your kind words; we appreciate your recognition of our quick and efficient service!
He got my ac up in running in no time.
Response from the owner:Thank you, T! We're glad to hear that everything is running smoothly and appreciate your recognition of our team's effort.

Furnace Inspection and Cleaning
A thorough furnace inspection is at the core of winter HVAC maintenance. A technician will inspect various components to ensure they function properly. This may include:
- Burner and Heat Exchanger Inspection: A technician will inspect the burner for signs of dirt or debris that could impede performance. They’ll also examine the heat exchanger, checking for any cracks or corrosion that could lead to issues such as carbon monoxide leaks.
- Gas or Oil Connections: Secure connections are essential for gas or oil furnaces’ performance and safety. Technicians inspect these connections for potential leaks or weaknesses that could cause hazards or reduce system efficiency.
- Cleaning and Adjusting the Furnace: Dirt and dust can accumulate in your furnace over time, impacting its efficiency. Cleaning and making minor adjustments to settings can help optimize performance and energy usage.
Checking and Replacing Filters
While filters are often associated with summer cooling, they’re just as necessary during the winter. Dirty filters can hinder airflow, making your furnace work harder and increasing energy consumption. During a winter tune-up, a technician will examine the filters and replace them if needed to improve airflow and reduce strain on the system. Regularly scheduled filter replacement also supports better indoor air quality by capturing dust, pollen, and other airborne particles.
Thermostat Evaluation
A functioning thermostat is essential for maintaining the desired temperature in your home. During a winter HVAC check-up, a technician will examine the thermostat to verify that it’s accurately reading the temperature and that all settings are correctly adjusted. This may involve:
- Calibration Check: An improperly calibrated thermostat can lead to temperature inconsistencies in your home. Calibration adjustments may be made to support accurate temperature settings.
- Programming Assistance: If you have a programmable or smart thermostat, your technician can help adjust settings to optimize energy efficiency during winter. This can include setting lower temperatures at night or when your home is unoccupied.
Inspecting Electrical Connections and Components
Winter can strain your HVAC system, making it important to confirm that all electrical connections and components are secure and in good condition. Loose or corroded connections can reduce system efficiency and pose safety hazards. A technician will tighten connections, test voltage, and inspect key electrical components like capacitors and relays.
Testing Safety Features
Winter HVAC maintenance is also about maintaining a safe environment for St. Louis residents. Most heating systems have safety features designed to shut down the system if specific parameters are exceeded. During a winter check-up, a technician will test these safety features including:
- Limit Switch Testing: The limit switch helps prevent your furnace from overheating. By testing this switch, technicians can assess whether it’s functioning as intended to support safe operation.
- Carbon Monoxide Testing: A carbon monoxide test is crucial if your heating system is gas or oil-powered. A technician will examine the system for any signs of leaks, which could release harmful gases into your home.
Verifying Proper Airflow
Proper airflow is vital to efficient heating, as it allows warm air to be evenly distributed throughout your home. During winter maintenance, a technician will check for blockages or obstructions limiting airflow. They may inspect:
- Ducts and Vents: Ducts and vents can accumulate dust, pet hair, and other debris over time. During a winter inspection, your technician may recommend duct cleaning if they detect significant build-up that could obstruct airflow.
- Blower Components: A blower in good condition helps push air through the ducts effectively. Inspecting and adjusting blower components, your technician can help maintain optimal airflow and improve system performance.
Inspecting the Pilot Light or Ignition System
Gas-powered heating systems rely on a pilot light or an electronic ignition system to start heating. A technician will inspect these components to ensure they’re functioning reliably. If the pilot light or ignition system is not working correctly, it can lead to inconsistent heating and higher energy bills.
Providing Recommendations for Additional Services
Finally, a winter HVAC check-up may reveal specific issues or areas of concern that could benefit from additional attention. For example, older systems may perform less efficiently over time, and replacement parts may be recommended to enhance performance. Additionally, if your home experiences drafts or uneven temperatures, a technician may suggest adjustments or upgrades to improve overall heating effectiveness.
Scheduling Your Winter HVAC Maintenance
Staying proactive with winter HVAC maintenance can offer St. Louis homeowners peace of mind, knowing that their heating system is prepared for the season’s demands. Regular maintenance helps to keep your system running smoothly and reduces the risk of unexpected breakdowns during the coldest months.
Contact Us Today
If you’re ready to schedule a winter check-up or want to learn more about how seasonal maintenance can benefit your home, the Thomas Hoffmann Air Conditioning & Heating team is here to help. Our technicians are experienced in the unique needs of St. Louis residents, and we’re committed to helping you stay comfortable all winter.