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Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business+2 more

Serving San Dimas, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Very happy with the new installation, replacement, and repair services for heating and air conditioning! The technicians were courteous, well-informed, and on time. They promptly resolved the problem and provided comprehensive explanations. A truly professional and trustworthy crew. Strongly suggested!"
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+24

Response time3 days
7 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for MSP Heating and Air, LLC
MSP Heating and Air, LLC
4.9(
328
)
Central A/C - Service or RepairAir Ducts & Vents - Clean

Serving San Dimas, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"This is the 4th of July weekend and our air conditioning went out!! We appreciated the quick response and the quality of the work performed by Danny. He was very thorough and quickly resolved the problem. He was very courteous and professional."
duct job all R-8 ducting
4 Ton GOODMAN Furnace
customer Vlastos
duct job all R-8 ducting
furnace install

+67

Response time4 hrs
28 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,518
)
Air Ducts & Vents - Clean

Serving San Dimas, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Sean was great about repairing my disconnected dryer air duct having to go into the crawl space and figure out what was going on. I'm glad he was able to get it done very quickly as well. He also had a very good attitude about doing the work."
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+11

Response time1 day
2 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
272
)
Central A/C - InstallCentral A/C - Service or Repair

Serving San Dimas, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

"I am so glad I did not try to install our new dishwasher myself. Joseph Rand came out from All City Plumbing. We had some difficult existing conditions and our technician finished the job fast, clean and made it look easy. When I call All City back to my home for another job I will request to have Joseph come out.."
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+42

11 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
59
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+1 more

Serving San Dimas, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"Temp Air personnel are responsible, honest, knowledgable, and their customer service is top of the line. They were accommodating with a scheduled that worked for us. Also, the techs that came to our house were professionals and answered all of our questions. I highly recommend them."
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation

+14

Response time10 hrs
Response rate99%
10 neighbors recently requested a quote
Avatar for Trabuco Air
Trabuco Air
4.6(
130
)
Central A/C - Service or Repair

Serving San Dimas, CA and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"Customer service was excellent. Helped me troubleshoot and prepare for the tech to fix my ac unit. Fixed in less than 15 minutes and great value for money!!"
Response time5 hrs
3 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for RS Air Conditioning & Heating
RS Air Conditioning & Heating
4.9(
23
)
Central A/C - Service or Repair

Serving San Dimas, CA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Ray is very professional, and provided options for my air conditioning unit replacement. Ray went out of his way to replace a small gas line leak that he found. He also drove to Anaheim early on Saturday morning to pick up a part that was needed for the AC unit, and came over to install it so that I would have the air conditioner available for the upcoming heat wave this week. He and his team were on time, and considerate during the installation process. I highly recommend RS Air Conditioning & Heating."
New Outdoor Install
Furnace Install
Satisfied Client
Energy saver!
Carrier Water Soure

+2

Response time3 hrs
Response rate100%
Recommended by100%of homeowners
Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
46
)
Central A/C - Service or Repair

Serving San Dimas, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"I asked for help on Yelp where a Rat got stuck in my air condition system the exterminator told me I'd have to call the company to come out and remove the unit, not only did Chris call very fast he came out very quickly and said that very unusual request but will be able to do it and remove the rodent acid wash the unit and even did the second unit where he didn't have to this is a great company and I had given my daughter his number to get in AC unit they wanted in the house because you could trust this person 100% a great company and a great person"
Furnace Before
AC After
Furnace After
AC Before
Before - Furnace

+83

Response time3 hrs
Response rate98%
30 neighbors recently requested a quote
Avatar for Penguin Heating and Air Inc
Penguin Heating and Air Inc
5.0(
15
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+1 more

Serving San Dimas, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"Very knowledgeable, professional, and great customer service! Penguin, serviced our central AC & Heat and they explained everything to us before performing the work. They also replaced our moldy insulation in our attic. They packed and transported the old moldy insulations, ensuring that the mold does not spread, and they left our house free of any mess. I'd recommend Penguin Heating and Air to anybody in need of AC/Heat service, repair, or installation."
Diamond Bar
Diamond Bar
Diamond Bar
Furnace Install
AC Condenser

+6

Response time2 hrs
Response rate100%
13 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

Yes, a dirty evaporator coil can freeze up. Dirty evaporator coils can’t absorb or transfer heat properly. The dirt and grime restrict airflow, which is needed to move heat throughout the system properly. Your air conditioning unit could freeze over, or it can cause your heat pump to freeze.

It depends on the size of the space you’re cooling down. If you’re looking for the most affordable way to cool an entire house over a long period of time, then central air will be more cost-effective. But when it comes to cooling down a couple of rooms or one floor, a window unit may be the cheaper option, with both a lower cost to install and less energy used to run.

NATE (North American Technician Excellence) certification is not legally required for HVAC technicians in most areas, but hiring a professional with this certification is highly recommended. NATE-certified technicians demonstrated their expertise and proficiency in different types of HVAC systems, offering assurance of quality service. It's a voluntary certification, yet it indicates a commitment to professionalism and ongoing training. Choosing a NATE-certified technician often means you're working with someone who is up-to-date on industry standards and best practices, which can lead to better service, energy efficiency, and long-term cost savings.

To lower humidity quickly, run a dehumidifier or your home's air conditioner or turn on exhaust fans to extract moisture. These methods can quickly and effectively bring your home's humidity levels to a comfortable condition. However, you should consistently practice humidity-reducing tasks to maintain proper indoor humidity levels.

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.

The San Dimas, CA homeowners’ guide to air conditioning services

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