Cotti Johnson HVAC, Inc.

August 2025 - we’ve had the unit serviced many times since ‘22. All professional, o formative & knowledgeable. Zach is our tech today: again, super! Thanks Cotti Johnson and your employees who keep us cool in summer! Thanks to Melissa, Paige & Nancy in the office too! Update 4/13/22: Troy Butler & his partner came to service/check unit before summer use. Professional, on time, again 5 stars! Ordered a Mitsubishi mini split AC. Install delay was on us as we needed to upgrade electrical. Company’s electrician worked with us the following month. Installers on time, efficient, great communication throughout install and they gave a good demonstration as well as going through the manual. Highly recommend: all communications were prompt & professional from Mel in the office to electrician and installer. Highly recommend. J Forgeron returned 12/17, earlier than expected 👍 to take care of a small item identified by the local electrical inspector.

I bought a new electrical service and generator from Cotti-Johnson. They explained everything in detail and arranged a loan for me. During a major storm this December 2023, when I needed to check my oil, their tech called me multiple times. He walked me through the procedure. I was able to open and make sure the generator would function after a 24 hr of operation.

Replaced Ring camera, installed towel warmer. Offered home electrical eval. Prompt, friendly & professional. In 4/2025, Josh did a thorough plumbing checkup. In 5/2025, Jim did a fine job maintaining our HVAC system. 8/2025, JT replaced my EV charger; excellent service

Very experienced -very thorough -very professional and very knowledgeable. Jim Cyr is Highly recommended

Called them to give me an estimate on electrical work in my house. They attempted to do work I didn't ask them to when they couldn't get my breaker to flip (which I flipped many times without issue) they procceded to put pliers on It AND SNAP IT. Broke my stuff and still charged $59 for their consultation. Unprofessional. Told them over the phone, and they don't care. Don't hire them, hire anyone else.

They did a great job. The electrician was able to identify the problem and came up with a solution that was reasonable and resolved the problem. I would hire them again.

On time. Patient got the job done well

Thumbs up!

Everyone I spoke to at Cotti-Johnson from the estimate through to installation of my generator were polite, professional and a pleasure to deal with. At the outset, the scope of the project and its cost was explained to me in simple and understandable language. The installation took place precisely on schedule and was completed within 3 hours. I received the necessary follow-up calls from the office to ensure the work was done to my satisfaction. I couldn't be happier with Cotti-Johnson.

DO NOT HIRE FOR HVAC Cotti Johnson has been the single worst contractor I have ever dealt with to date. If you have a simple HVAC repair, they may be able to do it but it's a gamble. If you have a large HVAC related work to be done, do yourself a favor and hire a company that understands the equipment they're dealing with. Where to start... I hired Cotti-Johnson to replace my old oil boiler with a modern heat pump system as the main source of heat for my house. Thomas Kelly, who was the initial person that came and made recommendations on the replacement system, should not be in the business of recommending heating systems to people. First of all, there's no heat load calculation of any kind, which is the first red flag but I didn't know any better at the time. They simply guess based on the size of the house without knowing a single thing about insulation or any other factor. Second mistake was recommending a single indoor head for an entire first floor that's separated by stairs in the middle of it. My initial concern with this was dismissed by Thomas who simply said "just give it a try!" Unfortunately, we're now stuck in a position where we can not remove the old boiler because the new system simply can not heat our first floor evenly. We have hot side and cold side and unfortunately our dining room is now permanently cold. It has been months of unanswered calls and emails and numerous back and forth to come up with a solution with still no end in sight. They do not return calls. Third mistake was installation. It took weeks to convince Cotti-Johnson and countless ignored calls and emails to get them to fix a mistake they made with the original install. Even then, they had to make multiple trips to finally realize they didn't account for line lengths accurately and undercharged the system. They finally did admit this and properly charged the system. They simply did not know how to deal with the equipment they're installing. I had to ask for proof of exactly how much refrigerant was being added in order for them finally do a proper calculation and add correct amount of refrigerant. Hire a diamond certified contractor if you want a Mitsubishi system and do not want to deal with these kind of amateur mistakes. Even after they finally did charge it to seemingly proper levels, they never installed back the brass screw caps for the outdoor unit or put the cover back on all the way. All around careless and amateur work. To add more insult to injury, I have been trying to get in touch with Cotti-Johnson for over 3 months for correcting inspection results and so far all of my calls and emails have been ignored. Learn from my mistakes and avoid this company at all costs.

I appreciated being able to speak with someone in the office to explain my situation (leaking water heater), and having someone come to my home so quickly to go over my options for dealing with the problem. Dylan, Aaron and the entire crew were so professional and knowledgeable about the on-demand hot water system we chose to install. They were a pleasure to work with, and I would highly recommend them to friends in need of similar services.

I would not recommend or ever use this company again. My experience was not a good one. I had no heat on a particularly cold night and l called their 24 hour emergency number on January 8th. and was told the charge would be $189 to come out and address the issue. I thought the price was steep but agreed to it because it was pretty darn cold in my house. The tech came to my home that evening and was there maybe an hour and a half and told me there was a wiring issue. Never had an issue with the wiring before but okay, He went out and got some wire and used that to repair what the problem was. The boiler fired up and appeared to be working. I was then asked to sign multiple blank screens on their hand held system as receipt of work done. I had no idea what I was signing as the screen was blank! The tech then told me that charge for the repair was an additional $231.00 for labor and repair. Again, I thought the price was high but I was happy to have the system up and running. When I asked for a receipt I was told it would come to me on my email. I was told my boiler was old which I knew and the technician suggested I schedule an appointment for someone to give me a price quote on a new boiler and I agreed to this. Well less than 45 minutes after the tech left the system shut down and stopped working again. I called the emergency number again to let them know and the answering service took all of my information and said they would pass this on. I was expecting at least a call back. Nothing... So I was no better off than I was before I called but now just out $420.00. I received a message the next day from someone wanting to schedule a time to come out and give a price for a new boiler. No mention of my call back to them regarding the issue at hand. I called the office later that day to voice my dissatisfaction of the the repair and no return call and was told the person I would need to speak to was on vacation so wouldn't get back to me for a week. I explained the situation to the woman who answered the phone and asked for my receipt which was never sent. I did later that afternoon get a call back from someone . He asked what I was looking for them to do and I said - can you get someone back to look at this since I paid for the service and it was fixed for 45 minutes (enough time to get paid and leave) and then stopped working. He said basically there is nothing more they could do and I need a new boiler. I would never recommend this company and told them no thank you on for any pricing on a new boiler. Wouldn't do business with them ever again.

Cotti was in touch with me at all times , Dylan the technician was excellent and polite made me feel at ezz would definitely recommend these guys.

My electrician from Cotti-Johnson HVAC was a master electrician. If you get him, you are getting the best. I went with the most expensive work package of the 3 that were presented. First off, it was pricey. I knew that going in. I want Cotti-Johnson to understand that I am serious about a working relationship with them. I feel I have done that with their electrical department. Now, if I need their plumbing or HVAC service, our relationship can build off the first experience.

Service was professional and friendly. I like the options I was given at time of payment, and how he explained everything he saw after servicing my furnace. No pressure just given the facts with options in the future for replacement parts.

Expensive but professional. The electrician that did the work was excellent and seemed.to enjoy explaining what he was doing and why it had to be done that way. I felt like I learned something while he installed ceiling lights. He also cleaned up after himself like he'd never been there.

Very polite electricians. Kept me informed and checked what they were planning to do to make sure it was what I wanted.

The electrician was very kind.

The company was very communicative, efficient, and professional. The electrician that came out was on time, friendly, and did a great job!

Very happy with the whole experience working with Cotti Johnson. Steve came out and gave me an estimate on the spot, he presented all my options with associated costs. I signed contract, paid deposit and scheduled the work. Eric and his partners did a great job and it looks awesome. I will hire them again.

Great job

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Extremely friendly service. Prompt and professional. It was a little more expensive than I thought it would be to swap out a light/exhaust fan, but the work was excellent and I would hire again in the future.

Timely, professional and excellent work. Highly recommended.

Fantastic experience. 1st class customer service. Couldnt be any happier