If you suspect a furnace electrical problem, your first step should be to call in an HVAC repair professional.
With the cold winter nearly upon us, you’ll want to check that your furnace will be able to keep you warm during those freezing nights safely. If you notice that your furnace isn’t working as it’s supposed to, it could be having an electrical system issue, or the HVAC system might be faulty.
Love that it’s the same technician every time. Let’s me know what he found and any concerns he might have regarding our units. Great customer service.
Response from the owner:Thank you, Theresa! We're glad to hear you appreciate having the same technician and the communication about your units. Your feedback on our customer service means a lot to us!
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.
Zach did an excellent job! Always courteous and friendly. We would highly recommend calling Thomas Hoffmann HVAC for any heating and cooling needs.
Response from the owner:Thank you, Allan! We're glad to hear that Zach provided excellent service and appreciate your recommendation for Thomas Hoffmann HVAC.
Was able to locate the problem right away and replace a switch and add Freon very nice job by this employee. I will recommend Thomas Hoffman for future references.
Response from the owner:Thank you, William! We're glad to hear that our team was able to quickly address the issue and that you had a positive experience with Thomas. Your recommendation means a lot to us!
I had Nick come out. He was awesome. Very knowledgeable, prompt and helpful. I will definitely recommend Thomas Hoffmann HVAC to others in need of HVAC support.
Response from the owner:Thank you, Jack! We're glad to hear that Nick provided you with excellent service. We appreciate your recommendation and look forward to assisting you and others in the future.
From our initial quote until the new furnace and AC were completed, everything was smooth and efficient. Zachary and Giovanni were excellent on-site, taking time to explain the installation as well as leaving the home clean. Thank you Thomas Hoffmann team
Response from the owner:Thank you! We're glad to hear that the installation process was smooth and efficient. Zachary and Giovanni will be pleased to know their efforts made a positive impact. We appreciate your kind words about the team!
Update 4/6/26: Zach Sperling is such a pleasant and knowledgeable technician that I recommend him highly. Thomas Heating has been a wonderful company to work with in my maintenance plan. If you are looking for a reputable company, look no more.
This company is so responsive that I love them. They respond immediately, and I trust them to tell me what needs to be done. I haven’t been steered wrong yet. They are genuinely nice to work with and honest. I use their maintenance program which I highly recommend.
Response from the owner:Thank you for your kind words, we truly appreciate your trust in us and are glad to hear about your positive experience with our services.
work good but got at least 6 messages from them very annoying
Response from the owner:Thank you for your feedback, Harold. We appreciate your input and understand how too many messages can be frustrating. We'll work on improving that experience for you.
Nick was great! He came right out and was able to solve the problem fairly easily. He communicated well and helped us prevent a future problem as well.
Response from the owner:Thank you for the review, Philip! We are happy to hear you had a pleasant experience working with us.
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.
They have never failed to fix my hvac problems. These folks are top tier.
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!
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!
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!
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.
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!
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.
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.
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.
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.
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.
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!
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!
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!
Is your furnace acting up? Electrical issues are often the hidden culprit behind heating system failures. While these problems can be frustrating, identifying them is the first step to restoring comfort. Don’t let electrical gremlins leave you in the cold – a qualified HVAC technician can quickly diagnose and resolve these issues, returning your furnace to peak performance. Let’s explore the most common electrical problems that could be affecting your heating system.
8 Electrical Issues That Can Shut Down Your Furnace
Clogged Air Filters: A Silent Threat Your furnace’s air filter does more than just clean your air – it protects vital electrical components. When filters become clogged with dust and debris, your blower motor strains to push air through, potentially overheating and burning out fuses. Beyond efficiency issues, this creates a serious fire hazard. Regular filter maintenance is essential for your safety and system longevity.
Water Damage: The Hidden Destroyer Even minor water leaks can spell disaster for your furnace’s electrical system. When water meets electrical components, it can trigger dangerous short circuits and system failure. Watch for moisture signs around your unit, especially in basement installations or near water heaters.
Loose Wiring: The Shake-and-Break Problem Your furnace’s normal operation creates subtle vibrations that, over time, can loosen crucial electrical connections. These loose wires often create intermittent problems that are challenging to pinpoint without professional diagnostic equipment. Left unchecked, they can lead to dangerous electrical shorts or complete system failure.
Dirty Fuses: More Than Just Dust Fuses are your furnace’s first line of defense against electrical problems. But they can’t properly conduct electricity when they accumulate dirt and grime. This buildup disrupts normal operation and can lead to system shutdowns. Professional cleaning and regular fuse inspections keep your system running smoothly.
Failed Starter Capacitors: The Heart of Your System Think of your starter capacitor as your furnace’s battery – when it fails, your entire system suffers. These components provide the crucial initial power burst needed to start your furnace. While replacement is relatively inexpensive, only trained technicians should handle these high-voltage components.
Transformer Troubles: The Power Conversion Problem Your furnace needs the right voltage to operate safely. The transformer converts your home’s 120V power into the specific voltage your system requires. When transformers fail, your furnace either won’t start or may operate erratically, potentially damaging other components.
Blower Motor Burnout: The Power Surge Risk When blower motors malfunction, they can suddenly draw massive amounts of power, blowing fuses and potentially damaging other electrical components. Regular maintenance can help identify motor issues before they lead to complete failure.
Thermostat Malfunctions: The Control Center Crisis Your thermostat is your furnace’s brain. When it malfunctions, it can force your system to run longer and harder than necessary, leading to electrical overload and potential short circuits. Modern thermostats offer improved reliability and energy-saving features that can prevent these issues.
St. Louis’s Trusted Furnace Repair Experts
Don’t let furnace problems leave you shivering this winter. When your heating system fails, you need more than just a quick fix – you need lasting solutions from experts who understand St. Louis’s unique climate challenges.
Keep your home cozy and your family safe. Our experienced technicians diagnose issues quickly and fix them right the first time, potentially saving you thousands in future furnace repairs.
Common Electric Furnace Problems We Fix:
✓ Furnace not heating properly
✓ Electrical system failures
✓ Transformer issues
✓ Faulty wiring problems
✓ Circuit breaker trips
✓ Thermostat malfunctions
30+ Years
Experience
Master Technician
Locally Owned & Operated
24/7
Emergency Service
24/7 Service Call Now
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.
