What does the One Hour mean in your company name?

The 'One Hour' in our company name indicates our guarantee to be at your home in the predetermined window quoted when you set your appointment. If we do not show up within that window, your service call fee is waived. 1. Express Appointment: This is an appointment that is scheduled during a specified one-hour time slot. You are promised that a technician will arrive at your home within this one-hour time window. You will also receive a call when the technician is en route to your home. 2. Reserved Appointment: This is an appointment that is scheduled during a specified, two-hour time slot. You are promised that a technician will arrive at your home within this two-hour time window. You will also receive a call when the technician is en route to your home. 3. Standard Appointment: This is an appointment that is scheduled during a specified four-hour time slot. You are promised that a technician will arrive at your home within this four-hour time window. You will also receive a call when the technician is en route to your home. 4. Stand-By Appointment: This appointment is for overflow situations. This appointment will not have a specified time. You will receive a call when the technician is en route to your home. 5. Emergency Appointment: This appointment is for an unspecified time after normal business hours Monday – Saturday and all day on Sundays/Holidays. Calls are dispatched in the same order they are received. You will also receive a call when the technician is en route to your home.

Do you service emergencies after-hours?

Yes, we offer emergency services 24-hours a day, year-round.

How much will my service cost?

The size and complexity of your HVAC issue will determine the cost. Because our trained, licensed HVAC technicians must diagnose the issue before we are able to quote you an accurate cost, we require an appointment to be set to complete a diagnostic on your system. Once the diagnostic is complete, your One Hour(R) technician will walk you through all costs using our Straightforward Pricing(R) Guide so there are never any surprise fees.

How often should I service my HVAC system?

It's ideal to service your cooling system each spring and your heating system each fall to ensure you find small issues before they become big problems.

How often do I need to change my HVAC filter?

Your filter should be changed every one to three months, depending on conditions in your home and your region's climate.

Do you offer purchase financing?

We work built relationships with several lenders to ensure our customers are able to restore comfort in their homes. Ask your technician about your financing options.

What are the advantages of a smart Thermostat?

Smart thermostats learn a household's patterns and adjust heating and cooling according to when a home is occupied, give homeowners the ability to control the thermostat remotely, and enable homeowners to reduce their energy use, saving you money.

HVAC means Heating, Ventilation, and Air Conditioning. HVAC systems refer to air conditioners, furnaces, and any unit that cools indoor spaces during the summer and warm them in the winter. In general, an HVAC system takes in air, heats or cools that air, and blows it into a room or any indoor space. While many homes have separate air conditioning and heating units, others have a heat pump that cools and heats the house. Not only do HVAC systems maintain desired temperatures, but they also improve indoor air quality and regulate humidity levels. But most importantly, these units provide comfort all year round.

What is a SEER Rating?

The SEER (seasonal energy efficiency ratio) is a measure of the efficiency of your heating and cooling system.The higher the SEER rating, the more efficiently a unit operates. The SEER rating of any given unit can range anywhere from 13 to 21.

Bringing Comfort Home

With Expert AC Services

One Hour Heating & Air Conditioning of South Bay

5.0

(116 reviews)

Heating & Air Conditioning

Services By One Hour

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Two One Hour Heating & Air Conditioning technicians standing confidently in front of a service van.

HVAC Repair, Installation & Maintenance

Heating, AC & Furnace Repairs in South Bay, CA

When homeowners want a reliable heating or air conditioning system that they don’t have to think about, they call One Hour Heating & Air Conditioning. We are the premier HVAC service provider in the United States for a simple reason: we actually care about your comfort.

At One Hour, we respect you, we respect your time, and, most importantly, we respect the trust that you put in us to keep your home comfortable. It’s why we back all of our work with a 100% customer satisfaction guarantee for two years, and it’s why we’re always on time—guaranteed.

We Have a Reputation

For Being Punctual, Friendly and Knowledgable

5.0

(116 reviews)

Victor Algaze

03-25-2025

“I wish I could select 10 stars for this team I had an excellent experience with One Hour Heating and Air South Bay! My techs, Joshua and Jason, were incredibly professional and thorough throughout the entire process. From the very start, they took the time to answer all my questions and coordinated smoothly with my landlord to ensure everything went off without a hitch. Joshua provided an estimate and explained everything in detail, so I never felt out of the loop. The craftsmanship was top-notch, and I felt confident knowing they were handling the replacement of my wall furnace heater. They literally took care of everything-- remove the old unit, permits, install, thermostat, make sure it's functioning well, etc. It was a breeze I also had the pleasure of speaking with Raymond, the chief contractor, and Maryam, the owner, both of whom were incredibly responsive and helpful. They made sure everything was taken care of promptly, and I really appreciated their communication and transparency. Bottom line: you're in great hands with One Hour Heating and Air South Bay! They made what could have been a stressful experience straightforward and hassle-free. I give this incredible team my highest possible recommendation and hope others use them as well”

Andres Lopez

03-21-2025

“Joshua and Jason were amazing. They communicated with clearly and the whole process from start to finish was fast and simple. I would easily recommend them to anyone with HVAC issues”

Acacia Wang

03-20-2025

“Joshua was amazing and handled everything quickly! He took time to show us and explain what was not working with our air conditioner. He was patient with our questions. The pricing was transparent. Very personable, highly recommended.”

d Williams

03-08-2025

“Joshua was very knowledgeable, polite and helpful. He was very patience in answering my questions. Thanks for doing a great job Joshua! I will call One Hour Heating & Air Conditioning for my future needs.”

lucycl22

02-25-2025

“Josh did an excellent job servicing our gas heater. He was professional and knowledgeable, quickly diagnosing and resolving the issue. I highly recommend Josh to anyone in need of a reliable and skilled technician!”

Bridget Gamble

02-19-2025

“Joshua was awesome- so helpful and professional. Really impressed by the new system and very grateful for the guidance. Highly recommend!”

Jeff Rose

01-28-2025

“Joshua was courteous, friendly and professional. He explained everything in detail and provided pricing. I would recommend his service.”

Paul Modiano

01-14-2025

“There’s a reason why One Hour has a perfect Five Star rating. James and Jason did a great job and I’m pleased I finally found a great team to handle my HVAC issues moving forward!”

Mo Sharifi

01-10-2025

“Jason came by and within a few minutes he knew the reason why our heater wasn’t working and had it fixed within 30 minutes. The whole visit took about an hour. Thanks Jason”

Special Offers

Mention at time of service

Over Thousands of Dollars in Savings

18 Months Financing Available

Subject to credit approval. Offer valid for all (repairs or installations) services $1,000 or more. Management reserves the right to modify offers at any given time. Some restrictions may apply. Call for details.
10% OFF IAQ PRODUCTS

Take steps to protect you and your family this cold & flu season. Consider installing an Indoor Air Quality System in your home.

Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Management reserves the right to modify offers at any given time. Some restrictions may apply.

HVAC Services You Can Count On

Our customers love what we do because we treat them like the neighbors they are to us. While we carry the One Hour name, we’re an independently owned and operated business with a personal investment in the local community. We back our work with a 100% satisfaction guarantee, provide StraightForward® pricing guides for your benefit, and will pay you back for being even one minute late to an appointment.

Here For You

When You Need Us Most!

Yellow One Hour Heating & Air Conditioning service van with company branding and slogan.

'Round the Clock Availability

No matter the hour, you can trust One Hour to be there to help you when you get hit with the unexpected.
100% Satisfaction Guarantee

We guarantee our materials, labor, and craftsmanship for up to two years from the date of your service.
StraightForward Pricing® Guide

Before we start any work, we discuss your available options so you know exactly what you are getting and how much it will cost. No hidden fees!
Always On Time…Or You Don’t Pay A Dime!®

We understand your time is valuable, so we promise to arrive at your home within the predetermined time window that you select, or your service call is free.

0% Financing Available

Prioritize your comfort without fronting the entire bill on day 1 – contact us today to learn more about financing options.

Discover Your Options

Meet the South Bay Team

Raymond Jackson

Technician

Raymond has lived in Southern California a large part of his life. Coming from a family of Tradesmen, he has been exposed to HVAC the majority of his life and holds a Journeyman HVAC License with the State of California. Not only does Raymond have over 20 years of experience as an HVAC service technician, but also holds Institute EPA certifications for universal levels of sections 608 and 609 for refrigerant transition and recovery and is Trane Air Duct Certified. He takes much pride in the work he provides, and believes that every client should be respected and given options, he always has a client’s best interest in mind. Raymond’s motto is that anything worth doing is worth overdoing and you can’t climb the ladder of success with your hands in your pockets. When he is not servicing HVAC systems, he enjoys fishing , boating and other family activities.
Joshua Quezada

Technician

I was born and raised in Inglewood. I am excited to be serving the residents of South Bay. I was pushed and finally decided to go to UEI in order to better myself and my future. After learning the trade, I fell in love with the work that we do because I have an opportunity to educate people on what they have and the functionality of their units. I really like helping people where I can and it makes me feel better knowing I could make a difference in someone’s quality of air standards. After graduating UEI and passing the universal exam for the EPA section 608, I continue to try to learn more and expand my knowledge as this trade is never ending and always progressing. My hobbies include an intense passion for cooking and watching sports.
Jason Almendra

Technician

I am excited to join the One Hour team. I began my career in construction and quickly realized that my passion was in the field of HVAC. This inspired me to take classes and increase my knowledge while actively working in the field. I have installed and repaired all types of units including mini-splits, furnaces, air conditioners, heat pumps, and packaged units. When I am not working at One Hour, I enjoy spending time with my wife and children in the beautiful California sun.