Electric water heater, no hot water: what to check

No hot water often starts at the breaker panel.

The answer in 2 lines. On an electric tank water heater, start at the breaker panel: a tripped double breaker is common. With dry hands and a dry panel, reset it once. If it trips again, stop and call a pro. If the breaker is fine, the heater's high-limit reset may have tripped, or a heating element or thermostat has failed. Pressing that reset means opening a cover over live wires: turn the breaker off first, or leave it to a licensed plumber or electrician.

The first 3 steps

Look at the breaker panel: the water heater is usually on a double breaker (240 volts). If it tripped, and only if the panel is dry and your hands are dry, push it fully OFF, then ON, once.
Check that the heater's own disconnect switch nearby (if there is one) is ON.
Wait: a tank that went cold can take a few hours to heat back up.

Stop: danger

Water near the heater's wiring, a burning smell or scorched wires: don't touch. Turn off the breaker only if you can reach a dry panel without stepping in water, and call an electrician.
Never remove the access covers with the power on: behind them are 240-volt terminals.
Tank leaking from the bottom, or the relief valve pouring hot water: turn off the breaker, close the cold-water valve on the pipe into the top of the tank, and call a plumber. Never cap or plug the relief valve.

The checks, in order

No hot water at all: breaker, disconnect switch, then the high-limit reset (often a red button behind the upper access panel). A breaker that trips again points to a shorted element or wiring: stop and call.
Lukewarm water that runs out fast: often a failed lower heating element or thermostat, or sediment in the tank.
Hot at first, then cold every evening: the tank may be too small for the household, or one element has failed.
Water too hot, or the reset keeps tripping: a stuck thermostat. Don't keep resetting: call a pro.

Sears Home Services explains each cause: What causes an electric water heater to stop working.

The high-limit reset: careful

Most electric tank heaters have a safety cutoff that trips when the water gets too hot. Pressing its reset button means turning the breaker OFF, removing the upper access panel and the insulation, and pressing the button: the manual for your model shows how. If you're not comfortable with that, don't do it. If it trips again, the cause (often a thermostat or element) needs a pro (InspectAPedia — high-temperature cutoff).

What not to do

Resetting a breaker that keeps tripping.
Turning the thermostat way up to "fix" lukewarm water: it raises scald risk and won't fix a dead element.
Turning power on to an empty tank (after draining it): the element can burn out almost immediately.

Who to call, and who pays

Licensed plumber: elements, thermostats, leaks, replacement. Replacing a water heater may need a permit from your city or county; the plumber should handle it.
Licensed electrician: a breaker that keeps tripping, burnt wiring, a dead circuit.
Renters: tell your landlord in writing. Hot water is generally the landlord's responsibility; rules vary by state and city.
Warranty: check the label on the tank for the manufacture date and the warranty length, which differs for the tank and the parts.

Good to know

CPSC recommends a setting of 120°F to prevent tap water scalds, especially for young children and older adults.
Electric tank water heaters often last around 10 to 15 years, depending on water quality and upkeep (Angi); draining some water yearly to remove sediment helps, following your heater's manual.
No official national statistics on water heater breakdowns were found as of November 1, 2026.

In Phoenix, Luis wakes up to cold showers. At the panel, the water heater's double breaker is halfway between ON and OFF. With dry hands, he pushes it fully OFF, then ON. By lunchtime the water is hot again. When it trips again a week later, he leaves it off and calls a plumber, who replaces a shorted heating element.

A made-up story, for illustration.

Bobby

Sources, verification, confidence

Verified on November 1, 2026, for the United States. Confidence: high for the safety steps and the 120°F recommendation; medium for causes and lifespan, which vary by model and water quality. This guide describes common cases, not a diagnosis.