Emergency: water is pooling under the tank.
A leaking tank is the most urgent water heater call. If water is collecting around the base, shut the cold water supply valve on the pipe above the heater by turning the handle clockwise. Then look at where the water is actually coming from before you decide anything.
Water heater repair means finding which part of a tank unit has failed and fixing it, or telling you honestly that the tank itself is finished. Many leaks come from fittings, the temperature and pressure relief (T&P) valve or the drain valve, and those can be repaired. A tank that is weeping from its seams cannot.
If the heater is electric and water is standing near outlets or the breaker panel, stay out of the water. Switch the heater's breaker off only if you can reach the panel while staying dry.
Gas smell at the heater.
If you smell gas near a gas water heater, do not troubleshoot the pilot. Leave the building right away, then call SoCalGas at 1-800-427-2200 from a safe location. If anyone's life may be in danger or you cannot reach SoCalGas, call 911.
Once SoCalGas has cleared the home, call us to check the gas control valve and supply line.
Symptoms we hear most often.
Each symptom points at a short list of parts.
Signs your water heater needs a plumber.
- No hot water at all, on an electric or a gas unit.
- Hot water that runs out within minutes or stays only lukewarm.
- Water around the base, or a drip from the T&P valve discharge pipe.
- A gas unit whose pilot light keeps going out.
- Rumbling, popping or hissing from the tank.
- Rusty or cloudy hot water, with clear cold water.
- A breaker that trips each time the heater runs.
What a plumber checks, in order.
On a gas heater, the first look is the pilot assembly. A weak flame, a dirty pilot tube or a worn thermocouple will shut the gas off by design. The plumber tests the thermocouple with a millivolt reading and checks the gas control valve for a clean, steady burn.
On an electric heater the work starts at the power. With a multimeter we confirm voltage at the upper and lower terminals, then test each heating element and thermostat for continuity. A burned-out lower element gives short hot showers. A dead upper element often means no hot water at all.
Hard water and the units in Claremont homes.
Claremont water comes from Golden State Water Company's Claremont system, a blend of treated groundwater and imported State Water Project supply. The utility's 2026 water quality report lists hardness from 97 to 330 mg/L as calcium carbonate, averaging 190 mg/L, or about 11 grains per gallon on average.
That is hard water. Over time it coats elements, clogs the drain valve and shortens tank life. If you are repairing a heater that is already scaled up, ask us about a flush now, and about a softener later through our water softener and filtration page.
Water heater down? Talk to dispatch.
A licensed plumber can diagnose the heater and tell you plainly whether to repair or replace.
Repair options and honest trade-offs.
| Fault. | Typical fix. | Trade-off. |
|---|---|---|
| Failed heating element. | Replace the element and test the thermostat. | Cheap part, but a scaled tank may fail again soon. |
| Thermocouple or pilot trouble. | Clean or replace the thermocouple and pilot assembly. | Fast repair, but the gas control valve may be next. |
| Leaking T&P valve. | Replace the valve and check pressure. | Often a sign of high water pressure or thermal expansion. |
| Leaking drain valve. | Replace the valve. | Simple, unless the tank threads are corroded. |
| Leak from the tank body. | Replacement only. | Repair is not possible, so see water heater replacement. |
What happens on the visit.
A repair visit from first call to hot water.
- 1.
Call and describe the symptom.
Tell dispatch whether the unit is gas or electric, and whether water is leaking.
- 2.
Safe shutdown.
The plumber confirms the gas, power and water supplies are off before opening any panel.
- 3.
Diagnose.
Parts are tested with a meter and gauge, not guessed at.
- 4.
Clear price before work starts.
You hear the repair cost, and the repair-versus-replace logic, before any part is installed.
- 5.
Repair and test.
The unit is refilled, purged of air, relit or powered, and watched through a heating cycle.
What affects the price of a repair.
Price factors for water heater repair.
Every repair is different, so the price depends on what the plumber finds. You get a clear price before work starts.
The failed part.
An element or thermocouple costs far less than a gas control valve.
Gas or electric.
The two types have different parts and different test procedures.
Access.
A heater in a garage is quicker to reach than one in a tight closet or attic.
Tank condition.
Heavy scale or corrosion can turn a small repair into a poor investment.
After-hours timing.
Emergency dispatch at night or on weekends follows a different schedule than a planned daytime call.
We do not quote a number over the phone because a leak from a fitting and a leak from the tank body are very different jobs. The plumber prices the actual repair on site.
Before the plumber arrives.
Do this while you wait.
Shut off the cold supply.
Turn the valve above the heater clockwise to stop a leak from refilling the tank.
Clear the area.
Move boxes and stored items away from the heater and its drain line.
Protect the floor.
Put a bucket under a drip, and stay out of standing water near outlets.
Note the details.
Read the data plate and any error code so the plumber can bring the right parts.
Worth knowing about older tanks.
Most tank water heaters last roughly a decade, and a tank leaking from the body is finished no matter how new the controls are. If yours is old and the repair is not cheap, the honest advice is often to replace it. A plumber should tell you that before selling you a part.
Related work you may need.
If the heater is beyond repair, water heater installation covers sizing a new tank, and a tankless water heater suits homes that want to stop heating a full tank all day. We also dispatch across La Verne.
Safety rules behind the repair.
Water heater work in California follows the California Plumbing Code, built on the Uniform Plumbing Code (UPC), including the rules for temperature and pressure relief valves. Gas appliance work falls under the C-36 plumbing classification, so verify the license with the Contractors State License Board.
Water heater repair questions.
.
Yes. Dispatch runs 24/7, so a leaking tank at 2 a.m. gets the same call-in process as one at noon. Call, describe whether the heater is gas or electric, and a licensed plumber is sent. Same-day appointments are offered when available for less urgent problems like a lukewarm tank.
.
On a gas heater the usual causes are a pilot that went out or a worn thermocouple. On an electric heater it is typically a tripped breaker, a failed upper element or a bad thermostat. A plumber tests these in order and tells you which part has failed before replacing anything.
.
Yes. Close the cold supply valve above the unit and, if you can do it safely and dry, shut off power or gas. Then call. A leak from a fitting can be repaired, but one from the tank body means replacement.
.
Leave the building immediately and call SoCalGas at 1-800-427-2200 from a safe location. If you think anyone is in danger, call 911. Do not touch switches or try to relight the pilot. A plumber can inspect the heater once the gas company says it is safe.
.
Often yes. The valve can be replaced, and the plumber also checks water pressure and whether the system needs an expansion tank. If the valve keeps dripping, the cause is usually pressure, not the valve itself.
.
Age, leak location and cost decide it. A failed element or thermocouple on a mid-life tank is worth fixing. A tank leaking from its body, or a very old tank needing a major part, is better replaced. We lay out both options with a clear price before work starts.