Serving Montclair & the Inland Empire
Licensed & Insured Honest. Reliable. Local.
Sweetwater Plumbing 💬 Text us ☎ (909) 312-4516

Water heater repair
in Montclair & the Inland Empire.

Losing hot water is never convenient. The good news: most water heater problems can be repaired, and we offer same-day service for most non-urgent jobs booked before noon. We diagnose the issue, give you your options in writing, each with one flat-rate price, and you decide, with no pressure to replace when a repair makes sense and honest guidance when replacement is truly the smarter call.

Water heater leaking right now?

Turn off the cold-water valve at the top of the heater. For a gas heater, turn the gas control to OFF; for an electric heater, switch off its breaker. Then call (909) 312-4516 any hour, or text (909) 247-6791 from 8 a.m. to 8 p.m. If you can’t stop the water there, shut off the main water valve.

Water Heater Expert
A.O. Smith Authorized Service Contractor: service, repair, warranty and replacement from a water heater expert. We install, service and replace A.O. Smith water heaters. Verify our A.O. Smith listing →
Common repairs

What goes wrong and what we fix.

  • No hot water (gas): usually pilot assembly, thermocouple, or gas valve
  • No hot water (electric): usually heating element or thermostat
  • Not enough hot water: sediment buildup, a failing dip tube, or (electric) a burned-out lower element
  • Strange noises (popping, rumbling): sediment buildup, often fixed with a flush
  • Water too hot or temperature swinging: usually a thermostat or gas control valve
  • Dripping or discharging T&P valve: a warning sign of overheating or high pressure from thermal expansion, so we also check your water pressure and the expansion tank's air charge
  • Discolored hot water: a worn-out anode rod (we can replace it), or the tank starting to rust inside (time to replace the heater)
  • Pilot light won't stay lit: thermocouple, gas valve, or venting issue
  • Tankless error codes: usually scale buildup or a sensor issue
Leaking from the bottom?

Find where the water is coming from.

Water under a water heater doesn’t always mean the tank has failed. Wipe the floor and the bottom of the heater dry, then watch for where fresh water shows up first.

  • The drain valve (the small valve near the bottom front): a slow drip from the valve or its threads. It may not be fully closed, or its washer is worn. This is usually a valve repair, not a new heater.
  • The temperature and pressure relief valve (T&P): water running down the discharge pipe from the top of the tank toward the floor. The valve opens when pressure or temperature is too high, often from high house water pressure or an expansion tank that isn’t working. Never plug or cap this pipe. We check your water pressure and the expansion tank’s air charge.
  • Condensation (gas heaters): drops under the burner area when a tank full of cold water first heats up, most often on a new heater. It stops once the water is hot.
  • A fitting on top: water from a supply connection or fitting at the top running down the side of the tank. Fittings can be repaired.
  • The tank itself: water seeping from the tank or from under the outer jacket, often with rust, when none of the above explain it. A leaking tank can’t be repaired; replacing the heater is the fix.

Not sure, or is water pooling? Turn off the cold-water valve at the top of the heater, turn the gas control to OFF (gas) or switch off its breaker (electric), and call us at (909) 312-4516.

Service Area

Serving 24 cities across the Inland Empire.

Chino · Chino Hills · Claremont · Colton · Corona · Diamond Bar · Eastvale · Fontana · Grand Terrace · Highland · La Verne · Loma Linda · Mira Loma · Montclair · Norco · Ontario · Pomona · Rancho Cucamonga · Redlands · Rialto · Riverside · San Bernardino · San Dimas · Upland

What customers say

Real reviews from real customers.

★★★★★4.8 / 5 average
· View all 588+ Google reviews →
WB
Walt Bauer
★★★★★ Sep 2026
GOOGLE

The company was responsive and professional. Jerry, their representative showed up on time, gave us a detailed quote and installation. I would recommend this company and this tech to others needing a water heater installed.

SC
Sandra Carbett
★★★★★ Apr 2025
GOOGLE

I had to have a new water heater. When I called Sweetwater Plumbing they sent a plumber right out. Freddy Lopez was outstanding and explained everything to me. Freddy was very professional at all times. I know that if I need a plumber in the future I will be…

GM
Greg Marick
★★★★★ May 2024
GOOGLE

Can’t sing Sweetwater Plumbing’s praises enough. 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. (I was very…

Common Questions

Frequently asked questions.

How much does water heater repair cost in the Inland Empire?
We look at the job first, then give you your options in writing before any work begins, each with one flat-rate price. The price you approve is the price you pay. Our customers tell us our pricing is honest and fair.
Are you licensed for water heater repair in California?
Yes. Sweetwater Plumbing is a licensed C-36 Plumbing Contractor (California CSLB #889182), fully bonded with $2M general liability insurance.
Where do you offer water heater repair?
We provide water heater repair throughout the Inland Empire, including Montclair, Ontario, Upland, Rancho Cucamonga, Chino, Chino Hills, Pomona, Claremont, Fontana, Riverside, and 14 other cities. Call (909) 312-4516 to confirm coverage.

Related Services

Helpful guides & tools

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