4.6 
294 *The Angi rating for Heating And Air Conditioning Service companies in Fountain Valley, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Fountain Valley, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on October 26, 2026
Serving Fountain Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Emergency services offered
"Good service and fast response hvac system works like a charm now"
+17
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 1990
Free estimates
Warranties offered
"Great. My daughter contracted Air Duct Professionals to do her home. James, the technician, was professional, knowledgeable and did a quality job. I contacted Air Duct to do my home and requested James. James arrived on time and did an excellent job. He also helped me with a leak with my HVAC Condenser and diagnosed and fixed the issue."
+11
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
Our business is our livelihood but it is also so much more. NT Electric & HVAC Inc was started to fill in a void in the current market and to make a business that people can place their trust in. Over the years we have never lost our commitment to our clients and that is what has allowed us to succeed in a very competitive industry. The employees of NT Electric & HVAC Inc stand committed to our purpose and will provide the best service!
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
We have over 20 + years of industry experience, and are dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company foundation is built on honesty and integrity. We specialize in Central A/C, Heating and Furnace systems in addition to a variety of HVAC-related projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction!
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 2011
Customers say: Quick response
"Nathan is very experienced and knowledgeable. He responds quickly to every text and phone call. He and his crew show up on time, work diligently, are respectful, and focused, and do all the little details like caulking and matching paint. They installed a 5 unit mini-split system and totally completed in 2 days. The price was very good and he even passed on the incentive from the manufacturer. There are always unexpected hiccups in every construction / installation job and there was no complaining, no extra charges, he just handled them quickly and efficiently. All in all, excellent work, excellent service. We highly recommend NT Electric and HVAC."
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Ionel is extremely knowledgeable in his craft. His honesty and dedication to customer service will bring him success. Will definitely call him for future opportunities, recommend to friends/family that needs HVAC help."
Serving Fountain Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"George is a true professional. He very patiently explained several options for replacing my hvac system. In the end I hired another pro for my project, only because they have been maintaining my system for many years. I would definitely consider George and SO CAL BOYS HEATING and AIR in the future."
Serving Fountain Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Emergency services offered
Warranties offered
The industry's best technicians make the happiest customers. Turn to the pros at All City Plumbing, Air, & Electrical for all of your plumbing, HVAC, and electrical needs. Proudly serving San Bernardino, Riverside, Los Angeles, and Orange Counties. We have over 5000s 5 star reviews across the web from our thrilled customers. Our company goal is to make sure that we have 100% customer satisfaction. We have options and payment plans that can fit in everyones budget. We provide free estimates and you only pay when you're happy. It's no surprise we've received the Angie's List Super Service Award six years in a row! Established in 2009. ACP was created to deliver exceptional service with the highest quality of craftsmanship. We guarantee you will be happy with our services in that we offer a money back guarantee. Our technicians are regarded by their peers to be some of the best in the industry. Our service experts are continuously trained. There isn't a plumbing or hvac problem we can't solve. We have the experience, knowledge and focus to solve any problem you may have. Give us a call today and let us earn your confidence.
+42
Serving Fountain Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"HD Mechanical did an amazing job. I felt safe hiring them to install my ac unit. They were very professional and they are very trustworthy. Would definitely recommend them to everyone."
+14
Serving Fountain Valley, CA and surrounding areas
Approved
In business since 2000
Free estimates
Warranties offered
"Kayvan was a wonderful service tech! He was on time and professionally checked out the water heater and the HVAC system. He was so polite and friendly. He explained the need for a new filter in the heating unit and showed me photos of the unit located in the attic. He also offered to do a friendly deed for free, which I greatly appreciated, He’s a great asset to Service Champions!"
+13
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