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TRUSTED BY SOUTH PASADENA, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon217
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in South Pasadena - Updated Nov 2026

Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+47 more

Serving South Pasadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"We noticed a foul smell coming from one of the vents in our HVAC system. We turned the system off and called AC Dave. Dave sent Justin and James to troubleshoot the problem. They quickly found a tear in one of our ducts--and the remains of a dead rodent. They cut open the duct, cleaned it and resealed it. We had heat again, about an hour after they arrived. Very fast and competent service."
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+6

Response time7 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for MULTI AIR SERVICE LLC
MULTI AIR SERVICE LLC
5.0(
22
)
Central A/C - Service or RepairElectric Furnace / Forced Air Heating System - RepairThermostat - Install or Replace

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Good and immediate service. Ricardo is, punctual, knowledgeable and nice. Ricardo responded immediately and came over a few hours later , ready to work (compared to other service providers I had contacted, who responded by Email requesting $100 plus just to show up for "evaluation"). The problem was that the A/C blower fan has been working continuously even when the thermostat controller is in "off" position. He replaced the internal electronic board with a new board and change some of the gas line pipes into the furnace unit, to bring them up to a modern safety code. The price is a little steep but the customer is happy."
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+37

Recommended by77%of homeowners
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,518
)
Air Ducts & Vents - Clean

Serving South Pasadena, 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 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 South Pasadena, 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 All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
273
)
Central A/C - InstallCentral A/C - Service or Repair

Serving South Pasadena, 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.

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+42

11 neighbors recently requested a quote
Recommended by96%of homeowners
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 - InstallCentral A/C - Service or Repair+8 more

Serving South Pasadena, CA and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"This company is the best! They installed a new HVAC system a little over a year ago and it was a terrific experience. They had a great price, were prompt, clean, polite and the system works perfectly. They came for a routine service and replaced a filter. Prompt, polite, and no pressure to upsell. Just very honest, fair price and great in every way."
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+10

Response time1 day
23 neighbors recently requested a quote
Recommended by92%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+5 more

Serving South Pasadena, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"
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
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Heating and Air Conditioning FAQs, answered by experts

You should plan to change your AC unit's filter every one to three months, depending on the manufacturer's recommendations. You should also clean the coils at least once per year, but if you have pets or someone in your household has allergies, you might need to clean them more often. Fortunately, many pros will clean the coils and change the filter for you during an inspection, which you should schedule once or twice per year.

No, you should not run an air conditioner with a Freon leak. If you think your AC unit is leaking refrigerant, shut it off immediately. When you keep using a leaky air conditioner, it could damage the unit and release more refrigerant. After turning off the AC, have an HVAC pro come take a look at the unit.

The length of an AC cycle depends on the settings in your thermostat and the unit you have. Central AC doesn't constantly run at full blast the way that a window unit does. A cooling cycle in most homes is 15 to 20 minutes. Then, the unit stays off for seven to 10 minutes to circulate the cold air in the house before the cycle repeats. It should repeat two or three times per hour. A short cycle lasts less than 10 minutes and then turns off.

Florida rooms can have heat or air conditioning, although not all do. These rooms can be added to the existing HVAC system or use a mini-split system, or they may just use a ceiling fan or the breeze from the windows for cooling. Florida rooms with air conditioning often have glass windows to keep the cool inside instead of just mesh screens.

A calculation method that your HVAC contractor will use to ensure your system does what it's supposed to is measuring duct output, or its CFM. The calculation requires knowing the cross-sectional area of the ductwork and determining the air speed past any given point within it.

The South Pasadena, 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.