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TRUSTED BY PRINCETON JUNCTION, NJ HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon435
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Princeton Junction - Updated Nov 2026

Avatar for Climate Mechanics LLC
Climate Mechanics LLC
4.9(
53
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+47 more

Serving Princeton Junction, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"We found CLIMATE MECHANICS from their stellar reviews while searching for a knowledgeable and competent HVAC company. For years, we were dealing with a condensation problem with our LG mini split air conditioner, and no one could find the source of the problem. We can honestly say that we've never experienced a company like CLIMATE MECHANICS so committed to making things right. Nate, the awesome climate mechanic that came to our home, and Robert, the owner of the company, could understandably have walked away because they did not install the system and were not responsible for the problem. Nate worked for hours trying to locate the problem. In the end, after so many years of leaking, CLIMATE MECHANICS went above and beyond and resolved our ongoing problem. Toni, their wonderful contact person, told us repeatedly that Robert just wanted us to be happy in the end. And we are. Totally. Thank you Robert, Nate and Toni."
Additional Photos
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+4

Response time1 day
10 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for LIV AIR
LIV AIR
5.0(
14
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+22 more

Serving Princeton Junction, NJ and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Staff is very friendly and helpful and well-trained professionals. They serviced my appliances and solved my issues on the same day whereas other service companies would not. Liv Air is the best HVAC service provider and I highly recommend their services."
Heating & A/C Project
Heating and Air Conditioning Project
Heating and Air Conditioning Project
Heating & A/C Project
Heating & A/C Project

+46

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for American Air Duct Cleaning & Services
American Air Duct Cleaning & Services
5.0(
61
)
Air Ducts & Vents - Clean

Serving Princeton Junction, NJ and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Brian from American Air Duct was friendly and did a super thorough job. Absolutely will use them again when I need any of the services they perform. Great job!!"
Dryer vent cleaning
Duct cleaning
Dryer vent cleaning
Duct cleaning
Duct cleaning

+15

Response time4 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Petro Home Services
Petro Home Services
4.4(
1,786
)
Central A/C - InstallOil Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+47 more

Serving Princeton Junction, NJ and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

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Response time6 days
Response rate100%
18 neighbors recently requested a quote
Avatar for Horizon Services, Inc. (NJ)
Horizon Services, Inc. (NJ)
3.9(
1,637
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+11 more

Serving Princeton Junction, NJ and surrounding areas

Approved

In business since 1989

Emergency services offered

Warranties offered

"Hired Horizon Services for HVAC replacement and plumbing (replace copper pipes that were old and deteriorating with pex and replace 40-year-old tub and surround). Both had a professional here quickly to give me an estimate and then again to start the work. The HVAC work was done quickly but large debris was left and communication with the installation crew was not good. The plumbing work is still underway but communication is good."
Horizon Services Heating & Cooling
Horizon Services Heating & Cooling
Horizon Services Heating & Cooling
 Horizon Services Heating Installations
 Horizon Services Heating Installation

+19

14 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Homelux, LLC
Homelux, LLC
5.0(
41
)
Air Ducts & Vents - Clean

Serving Princeton Junction, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Thanks Mark for cleaning my dryer, air vents and ducts. You were very respectful of my house, thorough and explains to me what you were doing and helping me understand what you’re trying to accomplish. I think you worked above and beyond. You even made a video because obviously I cannot be watching you and be at the attic where my HVAC unit. And I thank you for that- you are trustworthy!"
Air Duct & Vent Cleaning
Air Duct & Vent Cleaning
Air Duct & Vent Cleaning
Air Duct & Vent Cleaning
Professional Carpet

+19

Response time8 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for AAC Heating and Cooling, LLC
AAC Heating and Cooling, LLC
4.5(
65
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+10 more

Serving Princeton Junction, NJ and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Adam and Nate installed my new HVAC system in my home. This is my second time dealing with Adam since 2013. Adam is very honest and professional. My family is very satisfied with our new AC system. I would definitely recommend these guys for all of your heating and cooling needs."
HVAC
LENNOX: Heating and Air Conditioning
Carrier HVAC
LENNOX: Heating and Air Conditioning-Ductless
Lennox AC

+4

Response time1 day
Recommended by98%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

There are many recognizable symptoms of AC compressor failure. They include loud banging noises, hot air being continually circulated in your home despite running the AC at full blast, uneven airflow and cooling, and electrical issues like constant surges due to the compressor working overtime. While some of these symptoms, like uneven cooling, can have other root causes, they are common indicators of compressor problems.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

While it is possible to add Freon to your AC unit yourself, it is not recommended. In fact, the U.S. Environmental Protection Agency (EPA) prohibits the handling of Freon without a license. Freon is a dangerous gas that can cause irreversible damage to your AC or yourself if not installed correctly. It is worthwhile to hire a professional to add Freon to your AC.

Modern AC leak sealants work as a temporary measure to stop refrigerant leaks. You can purchase them at most home improvement stores or on online. When using an AC leak sealant, keep in mind that it’s only a temporary solution, so you’ll still need to hire a pro to install a replacement part as soon as possible.

If you know how to identify supply and return ducts, you’ll find that only the supply ducts will have dampers. Although your return ducts can have dampers, it’s not common. If you have one return duct that is pulling in too much air, adding a damper to it can help with overall system performance. However, dampers on return ducts are not a necessary addition for most homes.

The Princeton Junction, NJ 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.