The #1 largest HVAC service provider in the United States, at One Hour Heating & Air Conditioning of San Diego, we take our commitment to customer service seriously. We're so serious about it that we even have an on-time guarantee, which means if we're not on time, you don't pay a dime. Yes, you heard that right. We believe that your time is valuable, and we don't want to waste it. That's why we make sure to always show up on time and get the job done right. Plus, if there's ever a problem, we'll do everything we can to make it right. With our dedication to customer service, you'll feel like you're part of the family (the cool, air-conditioned family). We know how important your comfort is, which is why we take every measure necessary to ensure that you get the best quality service and products.
Overview
Hired 64 times
Background checked
License verified
38 employees
23 years in business
Business hours
Sun9:00 am - 4:00 pmMon8:00 am - 8:00 pm
Payment methods
This pro accepts payments via Cash, Check, Credit card, Venmo, and Zelle.
Top Pros are among the highest-rated, most popular professionals on Thumbtack.
2025
2024
Credentials
License verified
C20 – Warm-Air Heating, Ventilating And Air-Conditioning Contractor
License state: CA
Background checked
Passed by Roy Koldaro on Aug 3, 2023.
Services offered
Drain problem
Clogs
Slow drains
Leaks (area known)
Leaks (area unknown)
Repair urgency
I work on non-urgent repairs
I work on urgent repairs
Property type
House
Condo/Apartment
Townhouse
Projects and media
Projects and media
Reviews
Customers rated this pro highly for work quality, punctuality, and responsiveness.
Excellent 4.9
108 reviews
5
97%
4
0%
3
0%
2
0%
1
3%
This pro's rating is a combination of reviews posted by customers both on and off of Thumbtack. Thumbtack cannot verify external reviews.
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Read reviews that mention:
Pamela P.
Jun 29, 2026
•
From Google
Carlos did very well explaining what we needed. Even showed us his certifications! He also repaired our unit when other companies said "not repairable."Took him a few minutes. But we still wanted to purchase a new system( ours is 40 yrs old) simply because they are more efficient. Pam P.
Brian H.
Jun 30, 2026
•
From Google
Called on Friday afternoon and they had a tech at my home by Saturday morning. The service technician Daniel was extremely professional & knowledgeable. Daniel patiently discussed my repair needs and offered cost effective options.
Romain P.
Aug 5, 2026
•
Hired on Thumbtack
Great visit from Anthony who i worked for a quote for my heatpump project. Unfortunately due to budget constraints went with another provider
Details: Replace an existing A/C unit • Split system • I need the professional to purchase the unit • Attic • Ground floor • 2,000 - 3,000 sq ft • Two stories • House • Owner
Central Air Conditioning Installation or Replacement
John R.
Jul 3, 2026
•
Hired on Thumbtack
Carlos was great, very professional, easy to talk to. He gave me an outstanding proposal with management approval over the phone. the staff is more than willing to work with me to accommodate my calendar as well as my budget.
Details: Install ducts and vents • Replace an existing A/C unit • As recommended by the professional • I need the professional to purchase the unit • As recommended by the professional • Location recommended by the professional • 1,000 - 2,000 sq ft • One story • House • Owner
Central Air Conditioning Installation or Replacement
D G.
Jul 3, 2026
•
From Google
Carlos was very nice and mannered he was thorough and explaining the situation and what needed to happen and what could happen in the process, and I was very Grateful to have his assistance and it was a pleasure.
FAQs
What should the customer know about your pricing (e.g., discounts, fees)?
We believe in upfront pricing and clear options. Our technician will review the issue, explain the recommended work, and provide pricing before moving forward. We do not want customers surprised by the cost, so we focus on transparency, professionalism, and doing the job correctly.
What is your typical process for working with a new customer?
We start by listening to the customer’s concern and scheduling a convenient appointment. Once onsite, we inspect the issue, explain our findings, and provide clear repair or replacement options before any work begins. After the work is completed, we test the system, review what was done, and make sure the customer’s questions are answered.
What education and/or training do you have that relates to your work?
Our team is trained in residential heating and air conditioning systems, furnace and AC repairs, system maintenance, indoor air quality solutions, thermostat issues, ductwork, and full system replacements. We also focus heavily on ongoing field training, safe and professional workmanship, accurate system diagnosis, and clear communication with customers before, during, and after the job.
