Get matched with top thermostat installers and replacers in Alpharetta, GA

"Update from 20 Jan 2026: I`ve been a repeat customer of Keep Smiling Plumber, Electrical, Heating and Cooling in the past for several home-related repairs. After having an unfortunate experience with Keep Smiling PEHC during my most recent service, I had some misgivings about the company and whether I would return as a customer. In regards to their customer service, everyone that I`ve engaged with (technicians, onsite supervisor, receptionist) has always been professional and courteous which goes a long way with me. The issue that I had was technical in nature and left me with some dissatisfaction regarding the quality of work. After speaking with leadership of this organization Mr. Powell and Ms. Amy ,I believe that they hold the highest standards and expectations for their employees and ensure that any work-related issues are duly addressed/resolved. I can sincerely say that they have regained my confidence and trust in contacting them in the future for my future HVAC, Electrical and Plumbing home needs. The manager I spoke with told me that there wasn`t any way the damage of the pump could come from the technician doing a drain and flush of the water heater. He told me that it would cost $1200 to replace the pump on the water heater. After speaking with the manager at Keep Smiling, I called another company which I`ve seen before in the community and spoke with a plumber and explained to him what happened. The technician at the other company told me that the pump could definitely be damaged if the pump was still plugged up and not turned off while the water heater was being drained and flush. I called the manager at Keep Smiling and shared those details with him and he replied that he understands what I`m saying but there was nothing he could do about it. I told him that I don`t have any reason to lie about any of this and felt very frustrated and cheated by the fact that I went in expecting for them to do a maintenance check for $59 for plumbing but ended up spending a $1000 for new. The manager I spoke with told me that there wasn`t any way the damage of the pump could come from the technician doing a drain and flush of the water heater. He told me that it would cost $1200 to replace the pump on the water heater. After speaking with the manager at Keep Smiling, I called another company which I`ve seen before in the community and spoke with a plumber and explained to him what happened. The technician at the other company told me that the pump could definitely be damaged if the pump was still plugged up and not turned off while the water heater was being drained and flush. I called the manager at Keep Smiling and shared those details with him and he replied that he understands what I`m saying but there was nothing he could do about it. I told him that I don`t have any reason to lie about any of this and felt very frustrated and cheated by the fact that I went in expecting for them to do a maintenance check for $59 for plumbing but ended up spending a $1000 for new."

"We were getting uncontrollable heat upstairs. I replaced the thermostat but it made no difference.' Rashad arrived and immediately diagnosed that the damper controlling the upstairs heating was stuck so when we raised the thermostat for our lower level, the heat was directed to upstairs. After his diagnosis, he was able to replace the damper and all was functioning properly. Rashad was a pleasure to work with. He provided advise about preparing my HVAC system for winter and summer and made no attempt to "upsell" non-related issues."

"DJ showed up when expected. Did a great job installing my appliances . He was very careful ."

"This was a more complex wiring issue with my thermostat that the guys at Cunningham Associates were able to figure out. I thank them for taking the extra time"

"All of the staff we're very mannerable, they came in and installed two heat pumps in a very timely manner. The owner Adam, checked back with me to make sure that I was satified, he give 5 star customer service, excellent company."

"It was fair. He was punctual. Had to find the screen door myself but wasn't too bad. Install was fine; he had to touch up a few things afterwards. Door still need some patch up work after install like putting weather strips in to fill a little opening and paint an area."

"Best, most reasonable HVAC company in the area! Very professional and personable. No surprises and quick response."

United Air Temp is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.\n

"Paul was punctual and very professional. He installed my thermostat in no time."

"The heating was fixed but I am very unhappy about the pricing and lack of transparency. The service technician tried to upsell me a $200 safety valve that I “absolutely needed” (but online said should be able to be installed for less than $50 and was just another added feature to shut off the AC if the drain was clogged). The technician said he would not charge me for the repair on my dampener but I got a $40 charge anyways after refusing to pay for the safety valve, which I said I would buy myself. When I had spoken with Casteel on the phone the night before, they said the $40 charge would be for a second HVAC unit, which ultimately did not get serviced. I never received a detailed explanation of these charges and instead said this was a “miscellaneous fee” for repairs. They got the job done but I do not think I would hire again solely because I felt like I was being taken advantage of for most of the visit. I could not get the $40 charge removed after calling Casteel and explaining the situation. So it was a $129 service call with no parts replaced more expensive than other providers."