HVAC reviews in Waltham, Massachusetts

After a thorough assessment of my old A/C system, the technician efficiently dismantled it, taking great care not to disturb anything around it. The whole process took just under an hour. I appreciated their attention to detail and the peace of mind they provided. Their friendly demeanor and expertise made what could have been a stressful day much more manageable.

The technician arrived promptly, efficiently serviced my HVAC system, and even shared helpful maintenance tips.

From the moment the technician arrived, his expertise was evident. He installed our new thermostat with precision and even took the time to explain its features. The entire process was seamless and took just under an hour, leaving us thoroughly impressed. Highly recommend!

Having an efficient heating system makes winter so much more enjoyable. The technician was punctual, arriving a bit earlier than expected, and ensured everything ran smoothly. Now, my home feels cozy and warm.

The technician handled the HVAC issue with confidence and professionalism. He explained the problem clearly and completed the repair efficiently. Everything was tested properly before he left. The system is now running smoothly without any problems. I truly appreciate the reliable service.

The owner was very responsible and on point with our hvac projects.He and his team really do know what they are doing.Very satisfying!!!

ABL has been our first choice when it comes to HVAC service at our 200 plus apartments community. Reliable, very knowledgeable, professional and honest service.

Reliable and fair. I’ve used ABL for three years now on my property across hundreds of apartments, and there is no doubt the improvements have been significant. Peace of mind when they are handling our services. Thanks again!

I've been using ABL for many years as a service manager with different management companies, ABL was always my first choice and my satisfaction always go beyond my expectations. They're reliable, affordable and knowledgeable. I am highly recommend ABL for your HVAC and plumbing work and you will always be happy.

Ken was very courteous and thorough when investigating my broken AC unit. He explained every step and was looking out for me the whole time. I definitely recommend him and his team.

We had a lightning strike that fried our thermostats & one of our hvac systems. Ken handled it quickly, and very professionally -- and with great care I can't say enough about how good he was to work with. He will be my first call with any future hvac issues.

I asked Ken to do an AC unit and furnace inspection and he did an excellent job. He was very thorough in cleaning the accumulated dirt on our AC unit and explained everything he did clearly. He was also very responsive, punctual, and easy to talk to.

From the first phone call and scheduling of the service visit to the completion of servicing my AC system and the invoicing process, Ken provided top-flight service, as good as any I have ever received from such a service provider. His professional manner – expertise, attention to details, cleanliness – and his personal demeanor – patient, polite, clarity of communication – leave no doubt that Ken is the first person I will call for future AC service and the first person/company I would recommend to others, family, friends, or neighbors. Thank you, Ken.

Ken returned my call for an emergency repair of my central AC promptly and was able to come the next day. Diagnosis and repair took 20 minutes and we were back in operation. His price was reasonable.

Ken was super nice, and fixed our HVAC leaking problems quicker than I thought possible. So grateful for the speedy service. Definitely will be calling him again if anything else goes wrong.

On November 30, 2022, one of our 20-year old American Standard gas-fired furnaces would not heat the air unless the power was reset. I figured it was a faulty sensor or the circuit board, as we had just changed the filter. I called Ken at 10:30am and he said he could be at my house at 11:30am. Ken arrived promptly at 11:30am and got to work.

He was very thorough in checking over the furnace components and found:
a) the pump was not working (he replaced it with a new pump)
b) the air-intake valve had some leaves in it (he cleaned it out).

In the course of testing the system, he also determined that the control (circuit) board was faulty, which was why the system was shutting off. (I was sitting there watching what he did so I know he is honest).

He went out to get a new control board, and replaced that.

All told, he was busy with this problem for approx 4.5 hours.

It seemed his prices were fair given the number of issues he found and fixed (though obviously I can't make a price comparison with other service providers).

I'm having him back next week to check over my other gas-fired furnace.

He's a very nice person to work with.
I would recommend Ken's HVAC Service to others.
I was also VERY grateful for the SAME-DAY service !

Enjoyed the heat wave this past week in our air conditioned home thanks to Ken. Turned on the AC in our new place in May and found it wasn't cooling. Ken came same day and found out it had been installed improperly and without any coolant. He checked the system for leaks, cleaned the coils and added freon all for a good rate. AC has been working even when the heat index was over 100 this week!

Ken is awesome!! He came highly recommended by a friend. He was able to easily schedule me in, he was professional and so polite, and fixed my AC issue in the first visit.

Ken provided prompt, and excellent customer service for our urgent A/C issue. He accommodated us urgently on a Saturday afternoon, and not only fixed the issue but also provided instructions on how to prevent the same issue in future. Ken truly cares about his customers and we’re extremely happy with his services. We recommend him highly for anyone needing HVAC services.
Thank you, Ken!

I had an issue with my AC not cooling the house and reached out to Ken’s. Within an hour I got a response to schedule an appointment for the following day to have it checked out. He showed up on time, diagnosed the problem, and fixed it promptly. He communicated about the issue clearly and was pleasant and polite throughout. And on top he charged a fair price. Would recommend and use again!

Ken called me immediately to set up an appointment for the next day. We had a second heating issue and I called on Sunday and Ken picked up and scheduled to come the next day. He solved the problem and was very professional, skilled, personable, and patiently explained how the furnace worked so I would understand the process. I am very impressed with this company!