Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from KING OF SERVICE LLC. 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
King of Service LLC is a Worcester HVAC contractor serving residential and commercial customers with heating, air-conditioning, heat-pump, installation, maintenance, repair, and 24/7 emergency service. Its website says the company has a factory-authorized premium HVAC brand dealer relationship, geothermal specialization, a NATE-certified technical team, and Local First Business Alliance and Angie's List Super Service Awards affiliations. The site identifies King of Service LLC by name and lists its Worcester address and phone, but does not state a founding date or owner name. Google shows 18 ratings and 17 written reviews, all five-star, dated from September 2025 through July 2026. Customers describe no-heat furnace repair, tankless-water-heater repair, air-conditioning repair, new heating and cooling system installation, and urgent commercial-cooler service. Reviewers repeatedly mention prompt arrival, clear explanations, professional work, reasonable or competitive pricing, and successful repairs; one restaurant owner describes multiple emergency industrial-cooler calls, while another reviewer describes replacement work after a four-level condo’s two central-air units failed during extreme heat. Before booking, confirm the exact equipment scope, installation warranty, emergency-service terms, and any permit or license requirements for the work. The website’s certification and affiliation statements are self-reported, and the review history is concentrated in a relatively recent 2025–2026 window, so ask for current documentation and a written quote. King of Service appears best suited to Worcester-area homeowners and businesses needing HVAC troubleshooting, installation, maintenance, or emergency response, with plumbing-related work mentioned in one customer review rather than established as the primary trade.
I cannot say enough great things about King of Service and Isa. This was, without question, the best experience I’ve had with any contractor in over 37 years. During the recent extreme heat, both of my central air conditioning units stopped working in my four-level condo in Worcester. I first called one of the largest and most well-known HVAC companies in the area. After inspecting the system, they told me both units were beyond repair and recommended replacing everything with new units integrated with my heat pumps—for a total cost of approximately $28,000. They explained they had performed pressure tests and a complete diagnostic and concluded there was no point in trying to save either unit. Wanting a second opinion, I called King of Service. Isa arrived later that same day, thoroughly inspected both the indoor and outdoor equipment, and confidently told me the units could be repaired. He estimated the total cost at only $1,300 and said I would have cold air again within a few hours. To be honest, I was skeptical—but he was absolutely right. Just a few hours later, my entire home was filled with ice-cold air. Isa saved me more than $26,000, and my air conditioning is working beautifully. Isa is knowledgeable, honest, professional, and truly cares about helping his customers rather than selling them something they don’t need. His integrity and expertise are incredibly refreshing. If you’re told you need to replace your HVAC system, do yourself a favor and call King of Service for a second opinion before making such a major investment. It could save you thousands of dollars. Thank you, Isa and everyone at King of Service, for your outstanding work. I couldn’t be happier with the service, the results, or the value. You have earned a customer for life!
We recently called King Of Service as we had problem with no heat. Issam communicated great and was very knowledgeable and very helpful at fixing the problem with the furnace. Very personable, friendly, punctual and knew what he was doing. We really appreciated his expertise and honesty and would definitely call him again with any HVAC problems. Highly recommended.
He's the best person to have always very professional neat efficient very glad to have him on my side
Issam fixed my tankless water heater, the fan wasn't working. Very good service. Very professional and knowledgeable. Company you can trust to do any HVAC work, I will recommend all the time.
I was extremely happy with the service Issam provided. He’s very professional, courteous, explains everything clearly before starting, and does excellent work. Even my friend hired him and was thrilled with the results! Highly recommended.
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Added 17 new comments, added 52 new photos, established 4.2 rating
Fixed a code violation left by another contractor4.9
Water heaters4.9
Water heaters4.9
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Bryant & Mitsubishi authorized dealer3.9