John H. Coleman Co. provides cooling, heating, ductless HVAC, water heater, and commercial HVAC services along with electrical and plumbing services to the Knoxville, TN area.
Today, we had the experience of meeting Justin. We have an antiquated Lennox AC. Justin did everything he possibly could to repair the unit. It became apparent that repairing this unit was not worth the time or money. Justin explained all the components and how they worked. It quickly became apparent that Justin was interested in making the customer comfortable, i.e. knowing the new AC unit would be a big investment. Justin is a very knowledgeable technician and has very good customer service skills. The John H. Coleman company is very lucky to have an employee like Jusin, very personal, warm, and pleasing personality. In the future, we REQUEST Justin as our service technician. Thanks again for all your help. DJ and IV.
MD
Mark Davis
Mar 31, 2026
5.0
I believed I had an outlet issue but Jeremiah determined it was something much simpler. He explained the issue well and charged me a lesser amount than previously stated because it was such an easy fix. Not very often that will happen. It was very much appreciated!
CT
Chuck Thomas
Mar 30, 2026
5.0
Great customer service demeanor, thorough in the process of inspecting my system.
WG
William Edwards Gunter
Mar 17, 2026
5.0
I’ve always had a great experience with the John H Coleman company. They’ve been reliable and trustworthy for generations within my family, having installed and serviced my unit since 2014.
Justin was our most recent technician dispatched out to our house. He was not only professional but clearly knowledgeable about what he was doing, he also was able explain the issues happening in a way that made sense for me during the entire process and i genuinely appreciate that.
What really stood out was his attention to detail while checking everything over, while explaining the preventative care and services. He also took his time and we felt like he actually cared about our unit and family, it’s definitely worth requesting Justin on scheduled calls!
ME
Melissa Edwards
Mar 17, 2026
5.0
My father used this company for many years. After purchasing my home we have also since 2013. I have and will continue to highly recommend. Justin came out today and replaced parts plus signed us up for the annual service plan. I am now in my sixties and need such wonderful service. Jason was extremely professional and kind to my son in this cold weather. Once again highly, we recommend for service, price, and overall knowledge. Thank you!
Frequently Asked Questions About John H Coleman Co
Will my pipes freeze in one night?
Yes, pipes can freeze overnight. Freezing can occur in as little as six to eight hours, especially if the outside temperature drops below 32 degrees Fahrenheit and your pipes aren't properly insulated. For more information or assistance with water heaters in the Knoxville area, please don't hesitate to contact us.
How do you unclog a toilet when the water is high?
If your toilet bowl is full, first remove some water to prevent overflow. Then, pour one cup each of baking soda and vinegar down the drain. The resulting chemical reaction should help loosen the clog. For severe blockages, we recommend contacting us for professional toilet and drain cleaning services in Knoxville.
Why is the water in my toilet running?
Continuous toilet running is often caused by a faulty flapper, incorrect chain length between the flush lever and flapper, or a misaligned float. These issues can be tricky to fix without proper training. For expert assistance with toilets and water heaters in Knoxville, please give us a call.
Why does my shower faucet keep dripping?
A dripping shower faucet typically indicates a problem with the faucet or valve. Common causes include worn inner seals, hard water deposits causing clogs or corrosion, and deteriorated O-rings or gaskets. For a thorough assessment and professional shower drain cleaning, we encourage you to contact us.
How do you know if your sewer is clogged?
Signs of a clogged sewer include multiple backed-up drains, drainage in a sewer clean-out, visible sewage in floor drains, or water backing up in your shower when flushing the toilet. These issues can significantly disrupt your home life. If you notice any of these signs, please contact us promptly for reliable plumbing and electrical services in Knoxville.
What's the difference between drain clearing and drain cleaning?
Drain clearing focuses on removing large debris causing blockages, such as hair clumps or hard deposits. Drain cleaning involves using pressurized water to flush out any remaining debris after clearing. For professional drain cleaning services in Knoxville, we invite you to reach out to us.
How do I stop my house lights from flickering?
To address flickering lights, ensure bulbs are securely tightened in their fixtures and lamp plugs are firmly inserted into outlets. If you're using a non-dimmable bulb with a dimmer switch, this could be the cause. For more information or to request service from experienced Knoxville electricians, please contact us.
What causes a circuit breaker to trip?
Circuit breakers typically trip when there's an electrical fault that could damage the circuit. This may be due to excess current, a power surge, or a faulty component. If you need assistance with your breaker or information about generators in Knoxville, we're here to help.
How do you fix a breaker that keeps tripping?
Circuit overload is a common cause of tripping breakers. As a temporary solution, try using fewer appliances simultaneously on that circuit. For a long-term fix, consider having an electrician update your home's wiring and add more circuits. Our team of skilled Knoxville electricians is ready to assist you with this task.
What wiring do you need for a ceiling fan?
For ceiling fan wiring, copper or green wire serves as the ground wire to prevent power surges. If you see blue and black wires from the household circuit, there should be two wall switches. A red wire from the ceiling indicates a connection to the wall switch. For more detailed information about wiring, please contact our experienced Knoxville electricians.
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