We may be compensated if you purchase through links on our website. Our Reviews Team is committed to delivering honest, objective, and independent reviews on home products and services. More
AC units after being repaired by a local pro

5 Best AC Repair Services in Diamond Bar, CA

Get matched with a top local pro
Join the 6,755 people who have received a free, no-obligation quote in the last 30 days
  1. Home
  2. Local Pros
  3. AC Repair
  4. CA
  5. Diamond Bar
Written By Max Peterson|Last Updated: April 18, 2024

Technical failures can be inconvenient for residents who need an air conditioner (AC) repair in Diamond Bar, especially in the summertime when comfort is essential. Whether it's simple repairs or a full replacement you need, This Old House recommends starting your AC repair company search with these highly-rated Diamond Bar providers.

Top AC Repair Companies in Diamond Bar, CA

Cypress Heating & Air Conditioning, Inc Logo

Cypress Heating & Air Conditioning

5/5
Based on 378 customer reviews.

Services Offered

Furnace RepairDuct CleaningMaintenanceFiltrationAc RepairInspectionFurnace InstallationIndoor Air QualityAc InstallationEmergency ServicesDuctless

Highlights

  • Reliable customer support
  • Informative resources
  • Clear pricing policy
547 S Loraine Ave, Glendora, CA 626-963-9810 cypressair.com
Steve's 5 Star Service Cooling, Heating & Plumbing Logo

Steve's 5 Star Service Cooling, Heating & Plumbing

5/5
Based on 510 customer reviews.

Services Offered

InspectionVentilationMaintenanceAc RepairBoiler InstallationDuctlessIndoor Air QualityEmergency ServicesFurnace InstallationAc Installation

Highlights

  • Informative resources
  • Reliable customer support
  • Free quote
665 N Central Ave, Upland, CA 909-985-5254 stevesair.com
AIR NOW HEATING & COOLING INC Logo

AIR NOW HEATING & COOLING

4.7/5
Based on 69 customer reviews.

Services Offered

Boiler InstallationEmergency ServicesAc InstallationRadiant HeatingFurnace InstallationAc RepairDuctlessMaintenance

Highlights

  • Reliable customer support
  • Free quote
  • Clear pricing policy
1650 E Stuart Ave Unit #201, West Covina, CA 626-247-4968 airnow.services
CALCOMS Air Conditioning And Heating Logo

CALCOMS Air Conditioning And Heating

4.7/5
Based on 24 customer reviews.

Services Offered

Ac InstallationInspectionIndoor Air QualityZoning SystemsAc RepairFiltrationFurnace Installation

Highlights

  • Reliable customer support
  • Free quote
  • Clear pricing policy
700 East Birch Street, Unit#9781, Brea, CA 714-726-5655 calcoms.com

More Local Hvac Companies

Goldbaum's Air Conditioning & Heating

User Reviews: 4.7/5 

1531 W 13th St Ste K
Upland, CA 91786

Titan Air Conditioning Inc.

User Reviews: 4.6/5 

1280 W Lambert Rd Suite H
Brea, CA 92821

Temp Air System Inc

User Reviews: 4.6/5 

15843 Amar Rd
La Puente, CA 91744

AARD Mechanical Air Conditioning & Heating

User Reviews: 4.6/5 

855 W Lambert Rd
Brea, CA 92821

Air CareSaver - Air Conditioning and Heating

User Reviews: 4.6/5 

963 Fairway Dr
Walnut, CA 91789

ABC Heating & Air Conditioning

User Reviews: 4.6/5 

3833 Schaefer Ave suite l
Chino, CA 91710

Accurate Comfort Air Conditioning And Heating

User Reviews: 4.6/5 

19861 Auburn Ln
Yorba Linda, CA 92886

Marathon HVAC Services, LLC.

User Reviews: 4.5/5 

212 E Rowland St #317
Covina, CA 91723

All Air Masters, Inc.

User Reviews: 4.4/5 

34 N Central Ave
Upland, CA 91786

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

AC units after being repaired by a local pro

Get Your AC Repair Project Quote Today

Get matched with a top local pro

Please enter a valid 5-digit zip code!

Facts about Diamond Bar
Average Max Temp Percentile:85.4%
August Average Max Temp:87.7°F
Climate Zone:Hot-Dry
Average Energy Cost:$0.18/kWh
Median Year Houses Built:1980
Average Heat Waves per Year:3.64

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Common Types of Air Conditioners

There are a few different varieties of air conditioner systems on the Diamond Bar market. While HVAC contractors can work with most types, knowing which one you have will simplify your company research.

  • Portable air conditioners: As the name implies, portable ACs don't require permanent installation or ductwork. Instead, they remove hot air through an exhaust hose connected to a window or nearby vent. They're popular for apartments, condos, or individual rooms.
  • Ductless mini-split: Ductless mini-split air conditioner units have an exterior unit and one or more indoor units, with no ductwork required. They offer higher energy efficiency, flexible installation options, and individual room temperature control.
  • Window-mounted ACs: Window air conditioners are a popular choice for Diamond Bar townhomes, condos, and apartments. These budget-friendly, convenient units are designed for cooling single rooms and small spaces, and they fit snugly in a window frame or dedicated wall slot. Many window AC users set up their units without professional assistance, though technicians can still help with maintenance and repairs.
  • Split ACs: Split ACs have two main elements: one inside and one outside. They offer peaceful operation, improved energy efficiency, ductwork options, and more cooling capability versus mini-splits.
  • Central AC: These are the most common home air conditioners, offering consistent, precise temperature control. They feature a central unit that cools and purifies outside air and sends it through ducts to different rooms in your home.

How to Choose Your Diamond Bar AC Repair Service

You likely want a quick solution for your air conditioner's problem. However, before signing up with a repair company, it's important to do careful research to ensure it's the best for your home. Here are a few essential steps to follow.

Confirm the Company Is Properly Licensed and Insured

California HVAC contractors need a C-20 (Warm-Air Heating, Ventilation, and Air-Conditioning) license from the Department of Consumer Affairs. The application process involves comprehensive exams on business law and practical skills.

You should also verify a company has sufficient liability insurance coverage, even if your state doesn't require it. Choosing an insured company will protect you if accidents happen during work.

Read Customer Reviews

Find customer reviews on the Better Business Bureau (BBB) website for each company you're interested in. The BBB accredits contractors that handle complaints effectively and honor their warranties.

It's common for even the best AC repair providers to have both positive and negative reviews. Read each one carefully, and avoid a provider if most reviewers had subpar experiences.

Compare Estimates

Obtain at least three detailed, written estimates from different providers for the best deal. A good estimate should factor in additional fees such as permitting costs. You should also ask about manufacturer warranties, installer guarantees, and the emergency repair process.

Ready to Get a Quote on Your Hvac Project?

Get matched with a top local pro

Please enter a valid 5-digit zip code!

Frequently Asked Questions About AC Repair in Diamond Bar

How much can I expect to pay for AC repair in Diamond Bar?

Your AC unit repair costs will hinge on the type of unit you have and the malfunctioning part. A basic repair job like sorting out a thermostat might cost $150–$250, whereas a more intricate fix like exchanging the compressor will be more expensive.

See the average costs for common AC repairs below.

Common RepairAverage Cost
Clogged air filter$63–$168
Electrical circuits$200–$250
Drainage problems$100–$150
Thermostat$84–$210
Refrigerant leak$400–$1500
Frozen condenser coils$1,259–$3,777
Fan or air blower issues$150–$200
Compressor replacement$600–$1,595

How often should Diamond Bar homeowners have their AC systems serviced?

Homeowners should have their AC systems serviced a minimum of once a year to ensure optimal performance. This usually involves cleaning the outdoor unit of brush and debris. Regular servicing can help to maintain the system's efficiency and prolong its lifespan.

Why should I hire an HVAC professional? Couldn't I repair my air conditioner myself?

Yes, it's better to get a new air conditioner professionally installed. Most units have intricate piping and wiring that could stump even an experienced do-it-yourselfer. They also use chemical refrigerants that could pose dangers if they spill or leak. With their training and equipment, the right technician will set you up for success.

How long is my air conditioner's lifespan? When should I consider a replacement?

With adequate maintenance, your air conditioner's lifespan could be 10-15 years. Remember that parts frequently become obsolete as time goes on. If your servicer can't find a critical replacement part, you might need to consider getting a new air conditioner.

What industry certifications should I look for when researching Diamond Bar AC repair companies?

Private accreditations aren't always necessary, but contractors that seek them are typically more trustworthy. The two largest HVAC trade bodies that issue certifications are the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and Air Conditioning Contractors of America (ACCA).

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

Sources

FEMA