No hot water but the breaker is on

Open a hot faucet. If the stream is strong and cold, you have water and no heat. If the stream is weak at every faucet, the heater is the wrong suspect.

Check the cold tap too. Rust only on the hot side still points at the tank, but it is a different visit from a cold shower. Start with the no hot water page if the floor is dry.

A wet floor plus no heat can be both problems. Deal with the water first, using the shutoff guide.

What you already tried	What it rules out	What is still open
Breaker looks on	Nothing, until it is tested	A breaker can look on and be tripped
Reset once, it stayed	A dead short that repeats instantly	Element, thermostat, or no power on one leg
Reset once, it tripped again	A safe DIY path	Leave it off and call
Gas heater, no smell, no hot water	A simple leak	Control, sensor, or vent

We do not ask you to pull the element panel. Those screws hide live parts on an electric heater. Ready.gov is clear that a dark or uncertain electrical situation is not a home project in standing water. A dry closet is still not a reason to open the panel if you have not done it before.

That pattern means the heater made some hot water and then ran out. One element can be open, so the tank only heats the top. Sediment can steal the bottom of the tank. Or the heater is simply small for the house.

A guest bath plus a washing machine at the same hour will empty a small tank even when every part works. We say that out loud before we sell a larger one.

The electric or gas guide tells you which parts list we bring. The tank versus tankless note is for people who are tired of running out, not for a leak.

If the block is still dark, the heater is waiting on the utility. An electric tank does not recover until power returns and then needs time to heat a full shell.

Do not reset breakers in a flooded garage. South Beach and Wabasso houses see storm water that has nothing to do with the heater. If the closet is dry and the lights are on, then we look at the heater.

A gas heater that went cold after a storm may have a control that needs power, or a pilot that dropped when the house shook. If you do not smell gas and you have relit that pilot before, one careful relight is reasonable. If you have never done it, leave it. We would rather light it than talk you through a closet.

Electric heaters with one working element give lukewarm water that disappears. That feels like a half failure because it is. We meter the elements instead of guessing which one. You see the dead one before it goes in the trash.

If every fixture is cold and the heater is hot to the touch, the problem may be a mixing valve or a recirculation line, not the tank. We check that before we drain anything. Draining a good tank does not fix a valve in the hall. A dead element or thermostat, with a sound shell, is the repair visit.

Say how many baths went cold. One shower that fades while the kitchen stays hot is a fixture. Every hot tap going cold together is the heater. That single detail keeps us from draining a tank that was doing its job.

If the heater is electric, leave the panel screws alone. The test meters live parts. We do that. Your job ended when you looked at the breaker once and told us what it did.

If the heater is gas and the closet is clear of any smell, leave the controls where they are. Turning the dial to the highest setting does not repair a failed sensor. It only makes the next successful start too hot. Write down what the dial says now so we can put it back where you had it.

Run the hot side at the tub, not only at the sink. A low-flow faucet can feel cold because it mixes poorly, while the tub spout tells the truth about the tank. If the tub is hot and one shower is cold, we are looking at that valve, not condemning the heater.

Timers and switches show up in some garages, leftover from an old energy setup. A timer that is off looks exactly like a failed heater. Glance at it if you see a clock dial by the tank. Tell us if you flipped it. If there is no timer, do not go looking for one behind the unit.

We restore heat and then we stay long enough to feel hot water at a faucet. Leaving when the meter says the element is good, without hot water at the tap, is an unfinished visit. You should not have to call back to ask if it worked. Hot at the tub is the finish line, not a meter reading alone.