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HVAC PRO

Top Pro

Contact for price
Scheduling

Responds in about 34 min

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If you hire this pro, you’re covered by a money-back guarantee. Learn more

If you hire this pro, you’re covered by a money-back guarantee. Learn more

About
I have been doing HVAC servicing for 21 years and it has become a passion for me. I know all the processes from the inside, my goal is to understand the cause of the breakdown and eliminate it using the most modern and safest methods for health. I won’t just fix a temporary breakdown, I will fix your equipment for many years of service. I have all the necessary tools, supplies expense, modern measuring equipment, my knowledge and experience. And I use all this for my happy clients. My highlight is that I love my job and do it conscientiously and efficiently.
Overview

Current Top Pro

Hired 413 times

Serves Los Angeles, CA

Background checked

3 employees

21 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Apple Pay, Cash, Check, Credit card, PayPal, Venmo, and Zelle.

Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

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2025

Top Pro Icon

2024

Services offered
A/C services needed
Property type

House

Business

Projects and media
Projects and media
Reviews

Customers rated this pro highly for work quality, professionalism, and responsiveness.

Great 4.8

248 reviews

5

94%

4

1%

3

0%

2

1%

1

4%

Read reviews that mention:

pro avatar
Shawn H.

Jan 11, 2026

•

Hired on Thumbtack

Our central HVAC system died last night (1/10/26), in the middle of winter. I phoned Denis and received a response within 15 minutes. Once here, he quickly and efficiently diagnosed the problem. Denis immediately began working to repair our unit. Additionally, the cost for services was reasonable. I am very impressed with his knowledge base and skills. He also gave great recommendations for unit upkeep. Highly recommend.

Details: No heat • Single-level building • House

Heating System Repair or Maintenance
pro avatar
Danny R.

Dec 23, 2025

•

Hired on Thumbtack

Denis was excellent to work with from start to finish. He responded quickly to our request and was able to schedule a same-day visit, which was a huge help. Once on site, he quickly assessed the issue and repaired the leak efficiently and professionally. What we appreciated most was how mindful he was of our business—he completed the work without disrupting our retail store during a busy holiday shopping period. After everything was finished, Denis followed up with a call to walk me through what was done and answer any questions. Clear communication, fast service, and great professionalism. Highly recommend.

Details: Repair • Ground floor • Commercial

Central Air Conditioning Repair or Maintenance
pro avatar
Oleh C.

Dec 7, 2025

•

Hired on Thumbtack

I requested this pro for a thermostat repair, quoted at $75. When he arrived, there was a miscommunication and he ended up installing the thermostat, even though I only needed the power issue fixed. Installation was priced much higher ($150), but we settled at $100. He installed the thermostat, fixed the power problem, and everything works perfectly now. Denis also helped remove the old furnace filter, which I really appreciated. The work was good and the issue was resolved, so I’m giving 5 stars. My only feedback is that pricing should be crystal clear before starting the job, since that part is important to me.

Details: Repair • Central heating or cooling • House • Homeowner

Thermostat Installation or Repair
pro avatar
David A.

Nov 20, 2025

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Hired on Thumbtack

Denis from HVAC Pro went above and beyond to repair my Heating ventilation unit. He listened to my concerns ( I needed my family to feel warm and cozy during fall season), he patiently explained his diagnostic process and inspected the entire system. Finally he replaced a few parts and got unit working again. Amazing service! I recommend HVAC pro to service and repair your cooling and heating systems.

Details: Furnace • Routine maintenance • No heat • Not enough heat • Garage • Single-level building • House

Heating System Repair or Maintenance
pro avatar
Lisa D.

Nov 17, 2025

•

Hired on Thumbtack

I have a rental that has a couple of Air Conditioner heaters that seem to be temperamental. Denis went through and made sure everything was in good. Working order found an issue that will take care of later and got everything up and running for me in a short period of time. He’s my new go to Guy for air-conditioning.

Details: Routine maintenance • Routine maintenance • Outside • Outside • House

Central Air Conditioning Repair or Maintenance
Credentials
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Denis Zemliakov

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