If your water heater stops working, start with safety: check for a gas smell or water around the tank. Next, confirm the heater has power or gas, and make sure the thermostat was not turned down by accident. If those basic checks do not bring the hot water back, turn the heater off and call a plumber instead of opening it up.
A Two-Minute Safety Check
Stand near the heater and use your nose and eyes. A rotten-egg smell means leaving the home at once and calling your gas utility or 911 from outside. Water pooling under the tank means closing the cold-water inlet valve and switching the heater off. Either situation needs a professional, not a reset.
If You Have a Gas Heater
Look through the small window near the bottom. No flame usually means the pilot is out. The label on the heater gives relighting steps, and you can follow them if you feel comfortable and there is no gas odor. If the pilot will not stay lit, a sensor or the gas control may be failing, so stop trying after one or two attempts.
If You Have an Electric Heater
Find the heater’s breaker. If it has tripped, reset it once. If it trips again, leave it off, since that can signal a wiring or element fault. Do not remove the heater’s access panels, which hide live electrical parts.
Other Explanations
In an apartment or co-op, the whole building may share one hot water system, so ask a neighbor. A gas outage can affect the street. And a tank that is 10 to 12 years old may simply have reached the end of its useful life.
If basic checks do not help, a plumber can find which component failed. If age is the issue, getting advice on replacement sizes and types can make the switch easier. Call JPR Plumbing at (833) 603-1840.