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"Disappointing! The service was "once over lightly", the tech person in and out within 25 minutes or less. I've had Jeff here previously several years ago, the person this time was not Jeff, and Jeff did what I felt was a very thorough and complete maintenance inspection at that time, Jeff spending a good bit more time and explanation being more thorough and complete. Several of the items indicated to be done were either so quickly or hastily done that I was unaware of their being done, but can affirm with certainty that the tech person never checked the thermostat nor made any adjustments to the thermostat in evaluating the performance of the heating system. Could it be because my furnace is less than 3 years old that this service maintenance inspection was so "once over lightly"? Sorry Jeff, Karen, I feel I can do much better with other HVAC services in the future."

"I was extremely satisfied with the services provided and I will continue to use Sullivan in the future. I bought a $39 Angie's List deal for an inspection with $100 toward repairs; this was a great deal. It was very easy to schedule the appointment for a couple days later (they had availability as early as the next day). Brandon arrived within the agreed-upon window and called before his arrival, and he was extremely professional and knowledgeable. He talked through all my options with me and explained the risks very clearly. I was so pleased with the services that I decided to pay for a $16.90/month plan to cover my AC and heating needs going forward."

"John Mullen provided me with OUTSTANDING service when my A/C broke. I called John at 8:23 PM on a Friday night and asked him if he could help me. My home was already 78 degrees and rising with a dog and two small children. He was in his car going home from a long day's job and turned around to come to my house. He quickly diagnosed the problem as a simple blown capacitor. He replaced the part, told me how much it would probably be for a new A/C unit with and without a furnace if/when I would ever need one, but said it was not necessary right now, that my unit should run for a while longer even though it was old. Then, at 9 PM on a Friday night, after what I am sure was a long hot day for him, he took the time to show me how to clean my A/C unit with my garden hose to increase efficiency and decrease the chance of breakdown. He left my house, work completed all for only $90, at 9:08. Now that is outstanding. At no time did John try to sell me a new A/c unit or furnace, even though my units are both very old. He simply advised me of the possible cost if I wanted to do that. He went out of his way and well beyond normal business hours, to come and fix my problem for minimal cost. He was polite, clean, informative, and honest. And again, he took the extra 10 minutes at 9PM at night to advise me on routine maintenance, for free. The previous home owner had this unit serviced regularly by a different company. I initially called them and left a voice mail as they were closed. I am writing this review on Sunday afternoon and still have not heard from them. If not for John I could have been without A/C for 3 or more days. I am a critical person and do not believe in praising people just for doing their job. I am much more inclined to leave bad reviews for poor service, than good reviews for just providing the service you are paid to do. Please consider that when reading how much I am praising this man for going above and beyond. Hire him, you will not be sorry."

"The ARS technician-Will was excellent, courteous and professional. We will specifically request him to do our furnace checkup prior to the start of the heating season."

"Had a great experience with North Pittsburugh Heating. After getting screwed around by our home warranty company for almost 5 weeks (Choice home warranty btw, never use this scam of an agency), I contacted Tim independently to see how quick he could come out and get us a new condenser unit. Tim came out that very day to look at it and got our AC fixed within a week's time at a very good price. The tech's he sent to our house to do the job were also very courteous and helpful, amazing company! A major breath of fresh air after the nightmare we were dealing with previously. We'll definitely be using them in the future for our HVAC needs."

"I had Ryan Vos come out to service my steam boiler he is always a gentleman when he is here and helps me with whatever needs done, he is very professional, and knowledgeable Calfo has been servicing me for years and they are nothing but wonderful i would use Calfo for anything that needs fixed."

"They provided me with same day service & installed new parts in a timely manner on my hot water heater. Serviceman was pleasant, knowledgeable & had no problems installing new parts (under warrenty) & quoted me total cost prior to starting the work. I have used Kennihan before & will continue to do so."

In the middle of July, when the thermometer is pushing past 100 degrees Fahrenheit, air conditioning isn't a luxury that's nice to have in Pittsburgh—it's an absolute necessity that you don't want to live without. It's obviously a disaster when your air conditioner grinds to a halt on the hottest day of the year. But it's also incredibly frustrating to deal with an AC unit that only "kind of" works and is struggling to get your house down to the temperature on your thermostat or control humidity levels. When you notice those types of annoying issues, it's necessary to get professional Pittsburgh air conditioner repair services before the problem worsens and you're left sweltering in an overheated house.

"Explained things well, was quick and efficient during the repair."

When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.\n\nAt One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.