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Cundiff HVAC is a Watertown-area heating and cooling company whose recent customers call for repairs, furnace and AC replacements, tune-ups, and honest second opinions. The company says it has served Watertown and Waltham since 2013, is family-owned, and has NATE-certified technicians. The recent Google reviews are consistently positive: four reviews since March 2026 describe fast callbacks, practical furnace advice, careful diagnosis, clean installations, and technicians who explain the work clearly. Earlier reviews from November and December 2025 add furnace replacement, heat-pump servicing, AC repair, and next-morning scheduling to that picture. Google publishes a 4.4-star average from 10 ratings. The most useful recurring theme is restraint: customers describe second opinions that avoided unnecessary replacement and repairs priced fairly, alongside detailed accounts of furnace and AC work. One December 2025 review is explicitly presented as a revised review and describes an appointment nearly two weeks out; confirm emergency-response timing when a breakdown cannot wait. Cundiff looks suited to homeowners needing ordinary heating and cooling repair, installation, maintenance, duct, or air-quality work around Watertown and Waltham. Before booking, confirm the service area, arrival window, and scope of any replacement estimate.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Cundiff HVAC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
i woke up early and noticed the house felt cold. when i checked the thermostat, it was set at 59 instead of 68, and the hvac system was not running or making its normal humming sound. I checked the air filter even though I had recently replaced it, and then I looked at the breaker panel. It did not appear to be tripped, but I reset it anyway. Still nothing. I called for heating service and left a message. braden called me back soon after and said he could arrive pretty quickly, which was a huge relief. He showed up fast, inspected the indoor unit first, and then diagnosed the issue before even fully opening the outdoor equipment. It turned out to be a small wiring problem where the wires were touching the copper line. john was professional, friendly, and clearly knew hvac systems well. He explained the issue in simple terms, made the repair quickly, and tested everything to make sure the furnace and thermostat were working the right way again. In no time, the system was humming along and warm air was coming through the vents. nolan and the service team did a great job with communication, fast troubleshooting, and quality repair work. I really appreciated how quickly they found the problem and got the heating system back up and running. If you need help with your thermostat, wiring, furnace, or complete hvac service, they respond fast and fix the problem the right way. I was very happy to have my home warm and comfortable again.
If you need heater repair from a team that gives honest answers, this is the company to call. This was the second time I reached out for a second opinion on heating issues after other contractors suggested major repairs or even a full new HVAC system at very high prices. Both times, the technician carefully checked the system, explained the problem in simple terms, and recommended the most practical furnace repair instead of pushing unnecessary work. I ended up saving a lot of money and felt completely confident that they were guiding me in the right direction. They got the heating system working again quickly and smoothly, and the whole service visit was easy from start to finish. Next time I need heater service, furnace repair, or an HVAC opinion, they will be my first call.
They replaced my old gas furnace when it failed and have continued servicing both my furnace and heat pump ever since. I highly recommend them for HVAC repair and maintenance. The service has always been excellent, the technicians are friendly and skilled, and the pricing is fair. After moving to a new house, I tried a different HVAC service for my furnace and AC system, but I was not as satisfied with the overall care and attention. I decided to return for an air conditioning inspection and tune-up, and I was very happy with the results. Their experience with heating and cooling systems really shows, and they take the time to make sure the customer feels informed and comfortable. I have stayed with them for ongoing annual HVAC maintenance because each visit has been a positive experience. The technicians are knowledgeable, professional, and easy to work with. Their routine service keeps my furnace, heat pump, and AC running efficiently, and it gives me confidence that my system is ready for the hot summer weather in Boston.
Great air conditioning repair company. I had a good experience with them.
I had a really good experience with Cundiff HVAC when I needed my AC repaired in Newton. Geoffrey came out to give me an estimate and explained everything in a way that was easy to understand. The office staff was also very friendly and helpful whenever I called. After I chose my repair option, they were able to schedule the work for the next morning, which was great since it was starting to get warm outside. Braden and Nolan did the AC installation and repair, and they worked efficiently and kept everything clean. Even though it was a little tough to communicate sometimes, they were professional and made sure I understood what was going on. The air conditioning unit has been running smoothly since the repair. They also took the time to check out the AC coil and took care of a small issue with some caulking. Overall, I’m very happy with the service and would recommend them for any AC repair needs.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Sep 9, 2026.
Transparent diagnostics5.0
Repeat, years-long customers5.0
Decades-long customers5.0
Honest, no-upsell service5.0
Rapid response5.0