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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon742
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Thousand Oaks - Updated Nov 2026

Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,518
)
Air Ducts & Vents - Clean

Serving Thousand Oaks, 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."
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+11

Response time1 day
2 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for United Air Heating & Air Conditioning, Inc.
United Air Heating & Air Conditioning, Inc.
5.0(
51
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Service or Repair+13 more

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"I needed a smart thermostat installed and Victor, owner of United Air Heating & Air Conditioning, did a great job. He contacted me right away, quoted me a very fair price and we set up an appointment within a few days. He did a very thorough job installing the thermostat, plus took the time to explain some of the basics to me about programming it, etc. He also put down a drop cloth to protect my floor, which I noted. Other contractors have just let debris fall onto the floor (and left it there for me to clean up). He also gave me some helpful advice about my ductwork and other things. He was very personable, professional and his service was very reasonably priced. I can definitely recommend him and will hire him for any future HVAC needs. Thank you, Victor!"
Level 3 Maintenance
Fan Motor Cleaning
Level 3 Maintenance
before photo of the entire indoor blower & hou
Before photo of Level 2 maintenance on Furnace

+20

Response time3 hrs
Response rate86%
4 neighbors recently requested a quote
Avatar for Help-Me HVAC LLC
Help-Me HVAC LLC
5.0(
27
)
Electric Furnace / Forced Air Heating System - RepairCentral A/C - Service or RepairGas Furnace / Forced Air Heating System - Repair+2 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Haroon provided excellent HVAC service from start to finish at Help-Me HVAC LLC. He was professional, punctual, and courteous, and he took the time to explain everything clearly. The service was efficient, the workmanship was excellent, and the whole experience was smooth and stress-free. I would definitely recommend Help-Me HVAC LLC and Haroon for reliable HVAC service."
My jobs
My jobs
My jobs
1 neighbors recently requested a quote
Avatar for Around The Clock Heating & Air Conditioning, Inc.
Around The Clock Heating & Air Conditioning, Inc.
4.5(
836
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+8 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"My HVAC unit stopped producing heat so I called the folks at around the clock. They offered to come out the same day and after taking a look up on our roof determined it was a faulty control board. We talked a little about the lifespan of the unit and that while it was probably going to need to be replaced in the next 5 years or so, it made more sense to simply replace the board today. So he scheduled an appointment for the following day to come back with the replacement board. 1 day later and 15 minutes of work and I have heat again."
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+10

Response time1 day
19 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Highland Air LLC
Highland Air LLC
4.9(
111
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - Repair - For Business+4 more

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Highland Air did a great job servicing my furnace and HVAC systems. Shai showed up on time, figured out the issue quickly, and really knows his stuff. Everything was handled smoothly, and I appreciated how efficient and straightforward he was. Definitely recommend him if you need reliable HVAC work."
Condenser
Indoor unit
Before
During
After

+95

Response time4 hrs
Response rate89%
7 neighbors recently requested a quote
Avatar for Active Air Specialist Inc.
Active Air Specialist Inc.
5.0(
9
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallCentral A/C - Service or Repair+16 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

Here at Active Air Specialists, we sustain our business on quality and integrity. With over 20 years of experience we are experts in the Heating and Cooling trade and are committed to quality from the beginning to the end of your project. please call our office @ 888 410 0677 We look forward to earning your business. Give us a call or click to schedule a quote today!

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+7

103 neighbors recently requested a quote
Recommended by44%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

Yes, having mismatched evaporator and condenser coils in your AC system can lead to serious issues. For instance, it can result in higher monthly energy costs as the system runs longer to compensate for the mismatch. This mismatch can also put extra stress on the system, compromising its efficiency and longevity. 

Along with that, mismatched coils can lead to higher temperatures and humidity levels in the home. What’s more, using coils of different sizes may violate the manufacturer's warranty, as they are designed to work synergistically, and any mismatch could lead to repairs and system failure.

Here’s how AC professionals will clean your AC coils:

  1. Unplug the AC unit or turn off the breaker to the unit in your circuit breaker box.

  2. Remove the faceplate.

  3. Spray a vacuum hose attachment or compressed air can to remove debris, dust, dirt, and grime.

  4. Use a soft-bristled fin comb to remove stubborn caked-on debris.

  5. Use the vacuum hose to suck up any extra debris.

  6. Take a coil-safe cleaning solution and spray it onto the coils. Try to choose a no-rinse solution.

  7. Let the solution sit for at least 15 minutes.

  8. Gently wipe away loosened grime and debris with a microfiber cloth.

  9. Reattach the faceplate, plug in your AC system, or turn the breaker back on.

Yes, it’s best to turn off an AC unit that’s blowing hot air to prevent system damage and avoid expensive energy bills. If you let the AC continue running, it will put more strain on the condenser coil and compressor. Plus, if the AC is blowing hot air because of a refrigerant leak, it can also lead to a frozen evaporator coil.

It depends on the type of AC unit and the extent of the mold growth. For example, if you have a small amount of mold in your central air conditioner, it’s worth cleaning it to protect your HVAC system and your health. In situations like these, you can often remove the mold yourself in a couple of hours. On the other hand, if you have a portable AC unit with a severe mold problem, it makes more sense to buy a new one. On average, replacing a portable AC unit costs $100 to $500.

Yes, high-efficiency models reduce environmental impact with lower energy use.

The Thousand Oaks, CA homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.