Professional water heater repair for San Carlos homes and businesses. No hot water, leaks, or thermostat issues — we repair tank and tankless units.
No hot water disrupts daily life. We diagnose heating elements, thermostats, valves, and tank issues. Our licensed technicians serve San Carlos and nearby Bay Area communities with upfront pricing and quality workmanship.
Every job is completed by licensed plumbers with full liability coverage.
Tank, tankless, gas, and electric — we diagnose and repair no-hot-water issues fast.
We explain the problem and quote before work begins — no surprise charges.
Schedule service in San Carlos today. Use our contact form or call for a free estimate on water heater repair.
Customer reviews
Our hot water heater died after reaching the end of its life, and ASAP Plumbing (Kong was our plumber) came the same day and installed a brand new hot water heater for us. They were easy to work with and worked quickly! The original estimate for the job was that it would take 3 hours for 1 person, but they ended up bringing on a second person to help, and the whole thing was done in 1.5 hours. Communication was prompt, service was great!
Sherry Lin
Jul 16, 2025
Quick and responsible service. Don checked and repaired our leaky sink and water faucet adapter the same day that I called for the service. The work was professionally performed with proper cleanup afterward. I also like the fact that he wore shoe covers inside the house without the need for me to ask him to do so. Great work!
Jonathan
Dec 22, 2023
I’ve been using Don since his business began. Don always offers the best prices for all San Francisco draining needs. I’ve used him for faucet installations, garbage disposal, drain clogs, outdoor and indoor plumbing needs, plumbing leaks, sewer cleaning, among other services for my properties. My neighbors also raved about his coverage in the San Francisco bay area region for shower installation, water tank needs, drain cleaning, sink draining, etc.<br><br>He far and away exceeds my expectations especially in the San Francisco Bay Area region where prices are exorbitant. With Don, you get bang for your buck for professional plumbing and drainage needs with free warranty for the first month! I’ll be using Don for years to come! Hey Don, time to start a loyalty program?!
liqun jiang
Dec 22, 2022
Don was recommended by a friend of mine. He has helped me replace a sink faucet, a toilet, and installed an instant hot water heater. He has been fantastic with each. Always on time, checks in the day before for the appointment, gives quotes beforehand, knows what he is doing and is great at it, will order and bring any pieces you need beforehand, and is very friendly. Highly recommend!
Lydia Simmons
Dec 15, 2022
Donald is a true professional. He seems to always be able to figure out what is wrong and produce a fix in a very short amount of time. I've hired him for toilet jobs where the toilet was clogged or the flush was becoming weak. He was able to diagnose and repair within an hour and charged a fee that was more than reasonable compared to many other places I got quotes from. Another time I hired him to look into why black stuff was coming out of my shower head. He was able to quickly diagnose that it may be just that my water tank needs to be flushed, and BAM! After flushing, the issue never came back. I highly recommend Donald for any of your plumbing needs. He'll know what to do.
Oliver Xia
Dec 15, 2022
They came out and figured out where my water leak was coming from. They also diagnosed another plumbing issue that I did not call for. I was able to get 2 problems solved at one time. I truly appreciate the service! I have them in my contacts now and will refer them for plumbing work.
Tamara Nobles
Feb 18, 2026
I've worked with Donald of ASAP Plumbing several times over the past 4 years and can confidently recommend their services. He's unclogged drains, replaced kitchen sink water valves and garbage disposal, and resolved an active leak in my old rental apartment kitchen. He's prompt to respond to inquiries, shows up during the expected time window, and overall is a very friendly and personable guy.
Linden McGreevy
Jan 22, 2026
Came home to no hot water. Asked neighbors who to call. ASAP was true to their name. Showed up almost immediately, diagnosed the failed hot water tank, and got a replacement installed very fast. Also fixed a flow issue we had.<br><br>Good communication throughout the process, which I greatly appreciate.
Andy Berschauer
Dec 8, 2025
When you need reliable water heater repair in San Carlos, ASAP Plumbing Pros delivers fast, professional results. Our licensed technicians arrive equipped to diagnose the problem, explain your options, and complete the work with upfront pricing.
We proudly serve San Carlos and communities throughout San Francisco and San Mateo County. Whether it is an emergency call or a scheduled appointment, you get the same commitment to quality and customer satisfaction.
Use our contact form or call (415) 728-6391 to request water heater repair in San Carlos. We are open 24/7 because plumbing emergencies do not wait.
No hot water calls are prioritized. Most repairs are scheduled same-day or next-day.
Yes, we stock common parts for same-day water heater repairs.
Repair costs depend on the part and unit type. We diagnose before quoting.
Call (415) 728-6391 or request service online.
