Emergency Water Heater Repair in Los Gatos, CA

Is it the tank or just a fitting?

Not every wet floor means the heater is finished. A tank that leaks from its body is dead, but a leak at a fitting, a valve or a drain line is often a repair that costs far less than a new unit.

Look closely before you decide. Dry the floor, wipe the top of the heater with a paper towel, then watch where the first new drop forms. Wet pipe threads or a dripping connection on top of the tank suggest a fitting. Water running out from the bottom jacket, or rust-stained insulation, suggests the tank itself has corroded through.

That one observation shapes the whole decision, so it helps us to hear it on the phone.

Where the water comes from and what it means

This table lists the usual leak points and the usual outcome. A plumber confirms the cause on site.

A relief valve that drips occasionally should never be capped or plugged. It is a safety device.

No hot water, and what to check first

Sometimes the heater is not leaking at all and the problem is simply that the water stays cold. On a gas unit, a pilot that has gone out, a failed thermocouple or a dirty burner assembly is often the cause. A thermocouple is a small sensor that tells the gas valve the pilot is lit, and when it fails, the valve closes.

On an electric unit, a tripped breaker, a failed heating element or a bad upper thermostat is the usual story. If the water is warm but never hot, the lower element is the likely suspect. If it is lukewarm and runs out fast, the dip tube or sediment layer may be to blame.

Before calling, check that the breaker is on, the gas valve is open and the thermostat is set above the minimum. These checks take a minute, but they do save a trip.

Gas, electric or heat pump, how repairs differ

A gas water heater has a burner, a pilot or electronic ignition, a gas control valve, a thermocouple or flame sensor, and a flue that carries exhaust out. Repairs here are mostly about ignition and venting, and any work involving gas or exhaust deserves a licensed plumber.

An electric tank has two heating elements and two thermostats. These are straightforward parts to replace, but the tank must be full of water before power is restored, because a dry element burns out in seconds.

A hybrid or heat pump water heater adds a compressor, a fan and an air filter to an electric tank. These units need airflow around them and give fault codes on a display. Heat pump models are now a regular question from homeowners weighing a switch from gas. If you are thinking about that, we can talk through what the swap involves and what the Town needs for permits, without any sales pressure.

Los Gatos water and what it does to a tank

San Jose Water serves Los Gatos, and its 2025 report lists three source types. Mountain surface water averages 151 ppm hardness, groundwater averages 288 ppm, and treated Valley Water supply averages 99 ppm. Which source reaches your home varies, so test your tap or ask your water utility instead of assuming.

Harder water leaves more scale. Scale settles at the bottom of a tank, insulates the burner or lower element, and makes the heater work harder and run noisier. That is a practical reason to drain and flush a tank on a schedule, and to pull the anode rod and look at it.

The anode rod is a sacrificial metal rod that corrodes so the tank does not. When it is eaten down to the steel core, the tank itself starts to rust. Replacing a worn rod early can add years to a heater, so it is worth checking before the tank is old.

Homes near Lexington Reservoir or higher up the Highway 17 grade may be on wells or storage tanks rather than a utility main, which changes what feeds the heater, so mention it on the call. Repairs in Santa Clara County ZIP codes 95030, 95031, 95032 and 95033 come through one number.

Repair or replace the heater?

A simple rule works well. If the tank is sound and the part is cheap, repair. If the tank is leaking from the body, or is old and needs a major component, replacement usually makes more sense.

Look at the label for the serial number, which encodes the manufacture date. A heater past its usual service life that needs a gas valve or a new element is a close call. Heaters in this age band tend to fail again soon, so putting money into one is a gamble.

If the answer is replace, see water heater replacement for what that involves. If you are thinking of going tankless, tankless water heater service explains the trade-offs on scale and maintenance.

Permits, bracing and the Town of Los Gatos

Repairs that stay within the existing unit generally do not change the setup, but replacing a heater is a permitted job. The Town says that replacing a water heater with the same type in the same location needs a permit that can be applied for online. If the type changes or the unit moves, a regular building permit application is needed instead.

The Town's bracing handout says a water heater must be strapped against earthquake movement with at least two restraints, one in the upper third and one in the lower third of the tank. Each strap goes to a wall stud with a screw at least a quarter inch in diameter, driven at least half an inch into the wood, with a washer.

Check your own heater. If the straps are loose, missing or fastened to drywall alone, tell the plumber so it gets fixed while the work is under way. Questions about permits go to the Town Building Division.

What changes the price of a water heater repair

We do not name a number before seeing the unit, but these are the things that drive the final figure.

On insurance, a sudden tank rupture that floods a room is often covered, while a slow leak from corrosion and ordinary wear usually is not. Policies differ, so check yours before assuming.

Want your real number? Call (855) 575-2890. We give a clear price before work starts.

Pilot lights, error codes and flushing

A pilot that will not stay lit usually points to a dirty pilot tube, a worn thermocouple or a draft at the burner. You can try relighting by the label on the heater. If it fails twice, stop and call, because repeated attempts waste gas.

Modern heaters often show an error code or blink a light in a pattern. Note the pattern or take a photo of the display, since it narrows the fault before we arrive. For routine care, a flush once a year clears sediment and tells us how the tank looks inside.

For homes in Saratoga and the rest of our area, we bring common parts such as thermocouples, elements and relief valves, though the exact part depends on the model.

Questions about water heater trouble in Los Gatos