Water Heater Repair & Replacement in Montclair and the Inland Empire
We Make Hot Water. Our factory-authorized A.O. Smith technicians repair, replace and install gas, electric, tankless and heat pump water heaters for homes and businesses, 24 hours a day.
- Factory-authorized A.O. Smith
- CSLB #889182
- Open 24 hours, 7 days
- Based in Montclair
Getting hot water back is simple
No forms, no phone trees. Tell us what's going on and a real person takes it from there.
- Text us a photo of the labelThe rating plate on the side of your water heater tells us the brand, model, size and age.
- We tell you what we recommend, and whyRepair or replace, with an honest explanation in plain English and a clear price before any work starts.
- We do the work and clean upRepairs are usually same-day. New units go in with earthquake straps, and we haul the old one away.
Water heater services
Every brand and every type, from a 40-gallon gas tank in the garage to a whole-house tankless system.
Water heater repair
No hot water, pilot that won’t stay lit, a leak, strange noises or error codes. Most repairs are done the same day.
Learn more →Replacement & installation
Gas or electric tanks from 30 to 75+ gallons, installed with earthquake straps and the old unit hauled away.
Learn more →Tankless water heaters
Endless hot water for busy households. Installation, descaling and repair for Rinnai, Navien, Noritz, Takagi and A.O. Smith.
Learn more →Heat pump water heaters
The most efficient way to heat water. We check for any rebates available to you.
Learn more →A.O. Smith warranty repair
As a factory-authorized A.O. Smith contractor, we check your warranty and handle covered repairs.
Learn more →Commercial water heaters & boilers
Warehouses, schools, hotels and restaurants: hot water boilers, high-input gas and three-phase electric systems.
Learn more →Why homeowners trust us with their hot water
- Factory-authorized by A.O. Smith. We're trusted to handle A.O. Smith warranty repairs, and we're trained on every major brand.
- Honest recommendations. If a $200 repair will give you years more, we'll say so. If replacing makes more sense, we'll explain why.
- Licensed and local. California CSLB #889182, with our shop right here at 4667 Holt Blvd, Montclair, CA 91763.
- Respect for your home. We treat your home with care, keep you informed, and clean up when we're done.
- Real people, day or night. Text or call 24 hours a day and you'll reach someone who can help.
Not sure how old your water heater is, or whether it's worth fixing? Our water heater guide explains how to read the serial number, what size you need and what it costs to run each type.
What homeowners say about our team
Hot Water Heater Factory is a Sweetwater Plumbing company. These are real Google reviews of Sweetwater Plumbing, rated 4.8 out of 5 from more than 580 reviews.
“When I called Sweetwater Plumbing they sent a plumber right out. Freddy Lopez was outstanding and explained everything to me.”
“Eric Brindle was my service tech, and he did a fantastic job repairing my tankless water heater. … It can be hard finding reliable and honest service people, so I’m extremely happy that I now have a go-to plumber.”
“When I first inquired about replacing my 75-gallon gas water heater with an 80-gallon heat pump water heater, I was impressed with John Howe’s product knowledge and ability to understand my goals. … The installation was super clean which is what I really wanted.”
“They diagnosed the problem, called the owner John who handled all the approval for the replacement with Old Republic and the very next work day they were back with a new unit.”
“What JOY it is to have HOT WATER coming out of the faucet again! … They were excellent communicators and very focused on getting the job done with a high standard of workmanship.”
“I needed a new water heater and with one call they responded almost immediately. … One call and my problem solved. Thank you Sweetwater.”
Recent jobs
Follow along on real jobs from our team, from the first look to the finished install.
9 photos480-volt Rheem replaced with A.O. Smith DEN-52 at Montclair medical building
The call: A medical building in Montclair had no hot water. The equipment: A 480-volt three-phase Rheem electric water heater. What we…
Follow this job →
9 photos480-volt A.O. Smith electric water heater repaired at Rancho Cucamonga dental office
The call: A dental facility in Rancho Cucamonga had no hot water. For a dental office, that can’t wait. Staff need hot water for hand…
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6 photos10-year-old water heater replaced with A.O. Smith BTL 275 at Chino high school
The call: A high school in Chino called with no hot water. At a school, that means kitchens, locker rooms and restrooms without hot water…
Follow this job →Tell us a little, and we'll do the rest
Answer a couple of quick questions and we'll text you back with the right model, part or warranty answer.
Find your A.O. Smith replacement
Tell us your current brand and model. We’ll text you the matching A.O. Smith model.
Start →Which water heater is right for you?
Four quick questions, and we’ll text you our recommendation.
Start →Check your warranty
Send your serial number and we’ll check your coverage.
Start →Need a part?
Tell us what’s wrong. We’ll bring the part and install it.
Start →Serving Montclair and nearby cities
From our Montclair shop we cover the west end of the Inland Empire, 24 hours a day.
Frequently asked questions
Is Hot Water Heater Factory an authorized A.O. Smith contractor?
Yes. Hot Water Heater Factory is a Sweetwater Plumbing company and a factory-authorized A.O. Smith service contractor. We handle A.O. Smith warranty repairs and install new A.O. Smith gas, electric, tankless and heat pump water heaters in Montclair and nearby Inland Empire cities.
Are you the A.O. Smith factory or a water heater wholesaler?
No. We are a licensed plumbing contractor (CSLB #889182), not the manufacturer. We sell, install and repair water heaters for homes and businesses; for a new unit, we supply it and install it with earthquake straps and haul-away of the old tank.
How do I tell how old my water heater is?
The serial number on the rating plate shows the manufacture date. On A.O. Smith and State units made since about 2008, the first two digits are the year and the next two are the week. On Bradford White units, the first letter is the year and the second is the month. Our water heater guide has the full decoder.
Is my water heater still under warranty?
Text us your serial number and we'll check it for you. Most residential tanks carry a 6-year tank and parts warranty; labor coverage varies by model. You can also use our warranty check.
Should I repair or replace my water heater?
Replace it if the tank itself is leaking or it is more than 10–12 years old; repair it if it is younger and the problem is a part such as a thermostat, igniter, gas valve or heating element. In the Inland Empire, hard water and hot garages often shorten tank life, so we check the tank's age and condition before recommending either.
Can I still replace a gas water heater with a gas one in Southern California?
Yes. In June 2025 the South Coast AQMD board voted down proposed rules that would have required electric replacements, so gas-to-gas replacement is still allowed. New gas units must meet the district's low-NOx standards.
Do you offer 24-hour or same-day water heater service?
Yes. We're available 24 hours a day, 7 days a week, and most repairs are completed the same day. Text 909-247-6791 or call 909-707-3822.
What rebates are available for heat pump water heaters?
Most statewide rebates, including TECH Clean California, were fully reserved by late 2025. Utility and local offers come and go, so we check what’s available for your address when we quote. The federal 25C tax credit ended for installations after December 31, 2025.
What should I do if my water heater is leaking?
Turn off the cold-water valve above the tank, then turn the gas valve to OFF (gas) or switch off the breaker (electric). Then text or call us. A leak from the tank body usually means the tank has failed and needs replacement; a leak from a fitting or valve can often be repaired. See common water heater problems, or hot water slab leaks if the water is coming up through the floor.
What size water heater do I need?
Most Inland Empire homes use a 40- or 50-gallon tank; families of five or more, or homes with soaking tubs, often need 75 gallons or a tankless unit. We size it by your household and the unit's first-hour rating, not just the old tank's size.
Do you fix hot water slab leaks?
Yes. We find hot water leaks under the slab with electronic leak detection, repair them with a reroute, a spot repair or a whole-house repipe, including drywall repair, and help with your insurance paperwork. See hot water slab leak detection and repair.
Do you work on commercial water heaters and boilers?
Yes. We repair and install large gas and three-phase electric water heaters and hot water boilers for warehouses, schools, hotels, restaurants and apartment buildings. See commercial water heaters and boilers.
No hot water? Text us now.
Send a photo of your water heater’s label and tell us what’s happening. A real person texts you back.