A water heater that is dripping, hissing or stone cold is an urgent problem the moment water reaches your floor. Our 24/7 emergency line covers water heater repair in Lafayette, CA, and while you wait you can close the cold supply valve above the tank and cut the power or gas. Those two steps stop most of the damage.
Most tank problems come down to a small part: a thermostat, a heating element, a thermocouple, an igniter, or a relief valve that has gone stiff. A good repair finds the actual failed part instead of guessing. We carry parts for common tank models and can often fix the unit on the first visit.
Some tanks cannot be saved, and we say so plainly. If the steel shell itself is leaking, repair is wasted money and replacement is the honest answer. Safety parts such as the T&P relief valve are replaced to the standards in the California Plumbing Code, which is based on the Uniform Plumbing Code (UPC).
Water on the floor around the tank
Where the water comes from decides everything. A drip at the top usually means a loose supply connector or a failing fitting, which is a cheap fix. Water pooling at the base can be a drain valve, a relief valve discharge, or the tank bottom giving out.
Garage and closet installs hide leaks for weeks, because the water runs under the stand or soaks into the slab edge before anyone sees it. If the floor around your heater feels damp, or the drywall behind it has started to bubble, treat it as active.
A hot-water bill that creeps up with no change in habits can also point to a slow leak. A leak detection visit can separate a heater leak from a line leak in the wall.
While you wait: shutoffs in the right order
Do these in order. None of them needs tools beyond a flashlight and maybe a bucket.
- Smell gas? Stop here. Leave the building, call 911, then call the gas utility PG&E at 1-800-743-5000. Do not flip switches or use a lighter. The PG&E gas leak safety page lists the same steps.
- Electric heater: switch the dedicated breaker off before you touch anything near standing water. Gas heater with no gas smell: turn the gas control knob to off or pilot.
- Close the cold water supply valve on the pipe feeding the top of the tank. A quarter turn lever or a round handle, turned clockwise until it stops.
- Open one hot tap upstairs to let pressure drop, then run a hose from the drain valve to a floor drain or the yard only if the tank is cool.
- Move boxes and rugs away from the water, and keep children and pets out of the wet area.
- Call us and tell the dispatcher the fuel type, where the water is coming from, and whether the power or gas is off.
No hot water, lukewarm water, or a pilot that keeps dying
These are the faults we see most, matched to the likely part.
Pilot will not stay lit
A worn thermocouple or a dirty pilot tube is the usual cause. The part is small and the fix is quick.
Burner lights then shuts off
Often a failing flame sensor or a weak gas valve. We test before replacing anything.
Electric tank runs out fast
A burned-out lower element or a bad thermostat leaves only the top half of the tank hot.
Water too hot or scalding
A stuck thermostat is the likely cause, and it is a safety issue worth fixing the same day.
Rumbling or popping noises
Sediment baked onto the bottom of the tank. A flush can help, though a heavily scaled tank may be near the end.
The relief valve is dripping: normal or a warning?
The temperature and pressure relief valve is the last safety device on a tank. A steady drip or a burst of water from its discharge pipe means the tank is over pressure, over temperature, or the valve itself is worn out.
Never cap or plug that pipe. If the valve discharges every time the heater fires, an expansion tank is often missing or has lost its air charge, and that is worth checking before the valve is blamed.
Gas, electric, and heat pump tanks fail differently
Gas tanks fail at the burner end: igniters, thermocouples, gas control valves, and venting that has shifted or rusted. Because gas is involved, every gas repair ends with a leak check at the connections and a draft check at the flue.
Electric tanks have two elements and two thermostats, and a failure in one still leaves some hot water, which is why people live with a half-working unit for months. Hybrid heat pump heaters add a compressor, a fan, and an air filter that clogs, so a unit that suddenly runs in slow electric mode often just needs its filter cleaned.
If you are weighing a swap to a hybrid or an on-demand unit, our tankless water heater page covers that path.
Repair or replace: a quick decision table
Use this as a starting point. We confirm on site before recommending anything.
| What you see | Usually repair | Usually replace |
|---|---|---|
| Leak location | Fittings, connectors, relief valve, drain valve. | Seam or bottom of the tank shell. |
| Tank age | Younger tank with one failed part. | Old tank with rust at the base. |
| Hot water symptom. | Pilot, element or thermostat fault. | Rusty hot water and repeated failures. |
| Sediment | Light rumble, flush helps. | Heavy scale, tank noisy and slow. |
| Repair history | First repair in years. | Second or third repair in a short span. |
If the tank is past its expected life and the repair is large, putting the money toward a new unit usually makes more sense.
Soft water and bracing: what applies in Lafayette
EBMUD reports Lafayette treatment plant water at about 16 mg/L hardness, which is very soft. For a tank heater, that means scale on the elements and tank floor builds slowly, so a rumbling tank here points more often to age or a failing part than to heavy mineral buildup. You can check the numbers in the EBMUD water quality report.
California Health and Safety Code section 19211 requires water heaters to be braced against earthquake movement. If we replace a strap, a stand or a connector during a repair, we leave the tank anchored. Neighbors in Walnut Creek face the same bracing rule, so it is worth checking any tank you inherit in a house purchase.
What drives the price of a water heater repair
The part is rarely the expensive piece. Price follows the fuel type and how easy the tank is to reach. It also depends on whether a gas control valve or just a thermostat is failing, whether the visit falls after hours, and whether venting or bracing work is needed.
Many homeowner policies cover sudden water damage but not slow leaks or the failed heater itself, so read your policy and ask your insurer. Call us and we will give a clear price before work starts.
Water heater repair questions, answered
Yes. Our emergency line runs 24/7, and we offer same-day appointments when available for repairs that are not urgent. Call, describe what you see, and we will tell you which shutoffs to use while you wait.
A few causes look alike. A dripping drain valve or relief valve discharge is fixable. Water coming through the tank base after it has rusted through is not, and the tank needs replacing.
If there is no gas smell, many gas tanks have a printed lighting procedure on the label. If the pilot keeps going out, stop and call, because the cause is usually a worn thermocouple or a draft issue, not bad luck.
It depends on the fuel type, the failed part, access to the tank, and the hour of the visit. Insurance may cover sudden water damage but usually not the heater itself. Call, and we will quote a clear price before work starts.
Manufacturers and plumbers generally expect a tank to run for roughly a decade or somewhat longer, depending on use and care. Replacing the anode rod and flushing the tank can stretch that, and our replacement page explains the trade-off.
Yes. Water that shows up near the tank may be traveling from a supply pipe or the slab. If the heater tests dry, we can trace the source with leak detection equipment.
Still unsure what you are dealing with? Call the 24/7 line and describe it to a dispatcher.
Call (855) 575-2890