Welsch Heating & Cooling

HVAC contractor in St. Louis, MO.

In Welsch Heating & Cooling's own words

For over a century, Welsch Heating & Cooling has been the trusted name in comfort for the Greater St. Louis area. Since its founding in 1895, this family-owned business has dedicated itself to providing exceptional HVAC services. Their team of skilled technicians carries on a legacy of excellence, ensuring every home and business receives personalized attention and superior care. From furnaces to air conditioning systems, Welsch Heating & Cooling delivers reliable solutions with a commitment to quality that has defined them for generations. Experience the difference

Trade

HVAC contractor

Business address

2175 Welsch Industrial Ct, St. Louis, MO 63146

Telephone

(314) 872-8070

Website

welsch-heatcool.com

Hours

MondayOpen 24 Hours
TuesdayOpen 24 Hours
WednesdayOpen 24 Hours
ThursdayOpen 24 Hours
FridayOpen 24 Hours
SaturdayOpen 24 Hours
SundayOpen 24 Hours

From the business's Google listing, checked Oct 2026

Register

MO register

Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.

Google Reviews

4.5 (172)

We get our routine maintenance check ups from Welsch every year. Overall, we like their service. This review is about their scheduling practices for this. They use a very old method of sending out a postcard to have you then call them to schedule your routine maintenance visit. This really seems like a waste of time and money. Why would they spend the money to send out a postcard instead of just calling their customers who have already paid for the routine maintenance? Or, why don’t they schedule the maintenance visit when you’re wrapping up your spring maintenance visit? We called in late September and our maintenance visit for our Furnace is December 28. At that point it’s a little bit like, well, do we really need to have a Furnace check up? We do wish they would’ve called a month ago to schedule this instead of letting their postcards run through our poor USPS service and not get to houses for three weeks. *** I have edited this review, and raised it by a star, because after the initial review, they did call back and get us a time in mid October. This is much more reasonable. I still believe sending out the postcard through USPS is not a good way to schedule their customers’ maintenance. ***

David W.
Its labor day weekend, its 100 degrees, and Friday night our 6 years old AC goes out. It was after hours when we started looking who to call so we didn't expect much. But all the "big name" places routed us thru AI automated answering systems that couldnt seem to understand me saying "Wentzville" with our address. And they all had the same AI Robot service! A good friend recommended Welsch and I got routed immediately to an actual person when I called - who was able to take our info and pass it along to a technician. Next morning the tech was at the house by 730am, within 15-20 mins he had the system fixed after replacing the capacitor. And despite it being emergency repair the cost was very reasonable! Thank you Vincent for saving the day and also giving us some tips on maintaining our AC! We will be calling Tuesday to set up yearly maintenance with Welsch!

Krista B.
Professional, clean and precise in their installation work, quick, and honest. All around an excellent company to hire for HVAC work

Tim R.
Chose Welsch based on their positive reviews, and was blown away by their customer service. We had gotten a bid to replace our a/c unit and scheduled the appointment a few weeks out, and our existing, old a/c unit died before our appointment. Welsch brought us a window unit to use in the meantime, then sent someone out to do a temporary fix, which got the unit back up and running (this happened during a heat wave) while we waited to see if they could bump up our installation date. They were able to move our date up by two weeks, and we were cool and comfortable during our wait. The installation guys were great. They were on time, professional, polite, etc. Wonderful experience!

Tony B.
AC went out at 10pm last night. Called Welsch & they took a message telling us they would call at 7am the next morning. At 7am the called & arrived around 10am & got it working. Prompt service with very nice technicians. Also a union shop which is a plus too.

Patricia L.
We're very pleased with the transaction from start to finish. They did the initial builder install in our home and now, almost 20 years later, replaced both systems including humidifiers, media filters and Honeywell programable thermostats with an app. The cost was the most reasonable I could find of the HVAC companies that have been around a long time. The service and follow up have been great. Need heating or cooling equipment? Give them a chance. Glad we did.

Beverly M.
We hired Welsch to upgrade our home’s HVAC system that was over 25 years old. It was great interacting with the sales rep Dylan. Welsch had great pricing and warranty for a full upgrade. The install team, Dan and Mark, arrived on time and did an amazing job on the installation and cleaning up after themselves. My husband was very impressed on how well coordinated the removal and cleaning went. He was also really glad to learn that our techs had many years of experience. It makes us more confident. Also Kudos to the team for working through such a hot day. We felt bad that our install date ended up falling on such a hot and humid day. Looking forward to have them come back to service the units.

Coral R.
I’ve been using Welsch for over 10 years now. It started when my furnace went out on Christmas Day and it was 10 degrees outside. I called Welsch the next morning and they dispatched their tech Scott immediately. Within a few hours he had parts located, installed, and the furnace working again. Well this time, my A/C decided to fail one afternoon when it was 90 outside with high humidity. I called Welsch and they had their tech Scott here again within 24 hours. Scott arrived in the mid afternoon, troubleshooted the problem, located parts and had the unit up and running before he left in the evening. Definitely a comforting feeling when Scott shows up at your door. Fantastic company that hires dispatchers and technicians who try everything to get your units repaired and working. They will be my first call for any future HVAC needs.

Ryan K.
worst attitude via phone

Ayman P.
Steve came out and immediately diagnosed our HVAC issue. He was able to fix it the same day. He was very professional and timely. I would highly recommend Welsch!

Abby B.
Chris and Jeremy came out today to help service my AC unit. The identified the problem and took the time to educate me on what was wrong. I appreciate the service, and would recommend Welsch to my friends based on their incredible service.

Christopher P.
Alex came out during the snow to check on our furnace. He was nice and quick to come out. Would recommend this company to anyone

Monica F.
Very prompt service when our AC went out on the hottest day of the year. The tech, Donnie, was on time, professional, and had our problem solved very quickly.

Aaron H.
I like this company alot. Great customer service and friendly technicians.

Marie-Aimée A.
We contacted Welsch to give us an estimate on running some duct work in our basement as we are finishing it. Denny came out and took a look and had some really great ideas about how to set everything up. We had a very clear idea of the work that was to be done. We hired them and the HVAC guy that came out was phenomenal (sorry I cannot remember his name). He knew exactly what Denny proposed and where everything was going. And he did everything in around three hours. To top it all off, the price was very reasonable. Very grateful for the team at Welsch and they will be our go to for any future HVAC needs. Thank you all!!

Brad T.
Mr. Stephen Keys all I can say is EXCELLENT!! He did his thing Yall. Got my system running smoother than a baby’s bottom!👏🏽👏🏽👏🏽

Terri B.
I had a wonderful experience with Welsch Heating and Cooling. David came out to give me a bid. David was very knowledgeable, professional and suggested products that would work for me. He has great customer service skills and answered all my questions. Doug and Dan did a great job. I could tell they had been doing this for a long time and they were very experienced and skilled at their job. When they completed the job they cleaned up and explained how everything worked. I will definitely recommend Welsch Heating and Cooling to all my family and friends.

Lillian K.
Excellent experience. AC went out on a hot day and Alex J made it out same day and fixed the problem in 10 minutes. Highly recommend.

Josh W.
All of the employees that I dealt with were extremely professional and were willing to work with my busy schedule. Steve, who did the repair, was extremely knowledgeable and made sure that I understood what was wrong with the unit and what he needed to do to repair it. Now my system is working perfectly. I highly recommend Welsch Heating and Cooling.

Kristy L.
Called John Welsch after business hours to fix my AC Unit. It was 100° outside and John talked me through how to troubleshoot it because he couldn’t repair until morning. Not only did he tell me how to fix it but where to get the part and in less than 45 minutes I had everything back up and working. Highly recommend calling John if you have any issues with your AC. Super helpful.

tim W.
The service tech (Colin) that has been helping us with our AC has been fantastic! He is very kind, responsive, knowledgeable, and has went above and beyond to help us get our unit fixed. You can tell he really cares. Great customer service!

Taylor P.
Donnie & Alex were very professional and repaired my AC just in time for the heat wave on June 19th. I highly recommend Welsch for their service.

Bill C.
These guys are exceptional! Customer service was so great and they are quick to show up. The techs are super friendly and explain everything so nicely. We appreciate you Welsch!

Erna H.
Steve arrived on time and was engaging and so kind. He thoroughly checked all of our outdoor AC units and cleaned them out. He did all work inside and explained what he was doing. He cleaned out our dryer vent for us as well. He explained that we had a capacitor with a pretty low reading, and he changed it out. We have used Welsh Heating & Cooling for many years and in the past few years got Steve as our new tech, and so happy we did. We would highly recommend Steve at Welsch to anyone.

Sonya L.
We had an appointment on Wednesday for a regular maintenance check. On Sunday evening our furnace stopped working so Monday morning we called and they sent Donnie, he not only fixed the problem he did the regular maintenance while he was here. Donnie is also very personable and friendly. Good job!

Gail L.
Saved me thousands of dollars by actually taking the time to do a real diagnostic on my furnace. Was beyond happy that i made the decision to call here after talking to several other companies who gave me nothing but worst case scenarios.

Jared J.

About Welsch Heating & Cooling

Air conditioning and heating work from Welsch

Air conditioning and cooling are among the services Welsch Heating & Cooling names for St. Louis. The company says it has worked in heating and air conditioning for more than a century and serves both residential and commercial customers.

Its service lineup includes air conditioning, heat pumps, heating repair, furnace repair, AC repair, maintenance, and indoor air quality work. The company also says it provides emergency help 24/7, including for air-conditioning and furnace problems.

Welsch's rating, reviews, and availability

Welsch Heating & Cooling has a 4.5 rating based on 172 reviews. Reviewers most often mention quick dispatches, timely technicians, successful repairs, installation work, cleanup, and staff professionalism. Some reviewers raise concerns about maintenance scheduling and phone interactions.

The business is open 24 hours a day, seven days a week. Its website also names financing among its offerings.

NATE-certified technicians in St. Louis

The company says its technicians are NATE-certified. It describes its work as covering both heating and cooling equipment, from furnace and AC repair to heat pumps and maintenance.

Welsch Heating & Cooling says it has helped St. Louis homes and businesses for more than 100 years.

Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from the US Census and NOAA.