Gas smell, flooding or no hot water: what to do
If you smell gas near the water heater, leave the house, do not touch switches and call your gas utility or 911 from outside. Call us after the area is safe. A gas leak is never a plumbing appointment you wait on.
For a leaking tank, shut off the cold water supply valve on the pipe feeding the tank, switch the gas control to off or the breaker to off, and open a hot faucet to relieve pressure. Water at the base can come from a fitting you can tighten or from a failed tank that needs replacement. A plumber tells you which in minutes.
Leak at the base
A small drip from a fitting or the relief valve can be repaired. Water coming through the tank wall means the tank has failed and replacement is next.
No hot water
On a gas unit the cause is often a thermocouple or a pilot problem. On electric it is a heating element or thermostat. A no-hot-water call is usually a same-day repair.
Rumbling or popping
Sediment on the bottom of the tank traps water that boils, which makes noise and shortens the tank's life.
Rusty or smelly hot water
Brown water from the hot tap only points at the tank. A rotten-egg smell can point to a spent anode rod.
Common water heater repairs
| Symptom | Likely cause | Typical fix |
|---|---|---|
| Lukewarm water, electric | Failed heating element or thermostat | Replace the element or thermostat |
| No hot water, gas | Thermocouple, pilot or gas control problem | Replace the part and relight |
| Water at the base | Loose fitting or tank failure | Tighten or replace the fitting, or replace the tank |
| Relief valve dripping | High pressure, high temperature or a worn valve | Test and replace the valve, check expansion tank |
| Popping or rumbling | Sediment buildup | Flush the tank, or replace if scale is heavy |
| Hot water runs out fast | Broken dip tube or failed element | Replace the failed part |
Repair or replace?
Repair makes sense when the tank is sound and the failed part is cheap. Replace when the tank leaks, when it is old, or when repair costs reach a large share of a new unit. Tanks commonly last about a decade, so age matters. The label on the tank carries a serial number that dates it.
If the repair is likely to buy only a year or two, we say so. The water heater replacement page covers sizing, types and what a replacement visit involves.
Hybrid, electric and gas models
Gas units burn fuel in a chamber under the tank and vent exhaust through a flue, so the repair list includes the burner, the thermocouple and the draft. Electric units use two heating elements and two thermostats. Hybrid heat pump models add a compressor and a fan, which bring their own parts and need clearance for airflow.
Each type has its own failure pattern, and the plumber checks the unit type before arriving. Tell the dispatcher the fuel type and the age if you know them.
Local conditionsHard water, scale and your water heater
Sanger's water comes from city wells, and the city's 2024 water quality report shows hardness averaging 145.5 ppm, with test results up to 330 ppm. Heating hard water drives minerals out of solution, and they settle as scale. In a tank water heater that scale builds on the bottom and on heating elements.
Scale makes a gas burner work harder, makes electric elements burn out and can hasten tank failure. Flushing the tank once a year removes loose sediment and lets us check the anode rod. The anode rod sacrifices itself to protect the tank, and replacing a worn one extends the tank's life.
Rules that applyEarthquake bracing and code
According to California Health and Safety Code section 19211, residential water heaters must be braced against falling or sliding in an earthquake. If a heater is replaced or repaired in a way that moves it, we confirm the straps are in place. Permit rules for water heater work vary, so ask the Sanger Building Division whether your job needs one. We do not guess.
What affects the price of water heater repair
Repair costs depend on the part, the type of heater and how easy the unit is to reach. We give a clear price before work starts.
Water heater leaks are often covered by homeowner insurance for the resulting water damage, though the heater itself usually is not. Keep photos. Want your real number? Call (855) 575-2890.
Cold shower or flooded closet?
Call the 24/7 line for emergency water heater repair. A dispatcher books a licensed plumber same-day when available.
Water heater repair questions
Yes. The line is open 24/7 for leaks, gas smells and no-hot-water calls, with same-day visits when available.
If the leak is at a fitting or the relief valve, often yes. If water comes through the tank itself, the tank has failed and needs replacement.
Tank units commonly last about ten years, depending on water quality and maintenance. Hard water shortens that.
Yes. See tankless water heater service for flush, descale and repair.