4.7 
393 *The Angi rating for Heating And Air Conditioning Service companies in Fullerton, 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 Fullerton, 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 November 17, 2025
Serving Fullerton, 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 Fullerton, 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 Fullerton, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Love these guys! A year ago we had a heatwave, and on the first day our air went out. Danny came out same day and took a look. The very next day they came out and installed an entirely new (and appropriately sized) HVAC. Since then, they've come out at the beginning of each season and given our system a tune-up. They're timely, super friendly, and knowledgeable. Brandon came out today and performed a complimentary service, and now we're ready for summer! I should mention, the system they installed rocks! Our house gets plenty cold/hot now, and quickly."
+67
Serving Fullerton, 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 Fullerton, 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 Fullerton, CA and surrounding areas
Approved
In business since 2011
Customers say: Quick response
"I was very happy with the price, the quality of work and the how the workers and owner were so prompt when they said each time they were coming to work at my house. The estimate compared to other places beat the other guys hands down. I will recommend this company to everyone I know that need electric or HVAC service or installation."
Serving Fullerton, CA and surrounding areas
Approved
In business since 2019
Free estimates
Warranties offered
"Great job, Workers are great and they know HVAC. They are a great team and very nice people. Owner is very sincere & reliable. He will work with you on the best equipment...... you get what you pay for.!!!!!!!!"
+87
Serving Fullerton, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Professional, Reasonable, Dependable. Excellent customer service. Ionel is a master in HVAC. Super nice guy who always puts customer first. Highly recommended!!"
Serving Fullerton, 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 Fullerton, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
Penguin Heating and Air Inc is here to help! We offer a variety of HVAC services from service to installations. We are based out of the Placentia, CA area. Give our team a call today. We're looking forward to working with you!\n
+6
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