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Dave's Mechanical Maintenance, which says it has been in business for 10 years, installs, cleans and repairs heat pumps. It holds a 5-star Google average across 264 ratings and an A+ grade from the Better Business Bureau. A recent customer who had a heat pump installed on 10/28/2026 says the installer kept them up to date as each step was completed and that everything was cleaned up afterward. At Oh, Grow Up! in downtown Bangor, a recent customer says Dave's expedited the installation because inventory was melting, and the work went quickly even in an old downtown building. After a prior company failed to repair a Mitsubishi heat pump, a recent customer says Nate fixed it, a job that took time because of parts that included a second replacement compressor. A recent customer says the company designed a multizone heat pump system for their cabin and shared mock-up pictures and itemized billing before signing. A recent customer says Meghan helped with scheduling and with Efficiency Maine rebates. A recent customer who bought nine units called the price very high and said one leaked coolant after two years; the part was covered, but they were charged $750 for labor. A recent caller said that after explaining the job, the woman on the phone, who they thought was named Megan, said "I think we are all set" and hung up.
We had a heat pump installed yesterday 10/28/2026 by Dave’s Mechanical. The installation went very smoothly and the Gentleman that installed it kept us up to date as each step was completed. They also cleaned up everything after they were done. Megan in the office was very kind and always kept us updated on the installation date and time they were going to be here. Megan was very kind to help us with our paperwork needing to be filled out.
Very happy with the service I got.
We had a heat pump installed by DMMs team and are totally happy with the product, their service, and their competent assessment of our needs and situation. They explained everything clearly and in detail , but most of all they were polite and courteous as well as knowledgeable. They arrived on the specified date and time and cleaned up when they were done.
Dave’s Mechanical should be your go to company for Heat Pumps. They are very knowledgeable, honest, and professional. Our home looks so good with the new units and grey covers for the wiring, etc. It was done timely and with care. Their pride in their work is obvious and very appreciated!
We had a heat pump put in at camp a couple of years ago through dave, and this year we needed to move it. They were very helpful scheduling, a time that fit into our ability to be at camp. The crew came out, moved the heat pump. They did a wonderful job, didn't leave a mess. Cleaned up all their stuff. the price was reasonable. Very happy with the service.
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1 change recorded — last scanned Oct 30, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from DAVE'S MECHANICAL MAINTENANCE. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,500 – $10,300
Typical HVAC project around $7,400
Geothermal heating system service4.0
Furnace care for one customer over 25 years3.4
Oil-to-gas boiler and water heater conversion3.4
State-verified HVAC licenseNot yet rated
