Check whether the problem is isolated
Test more than one hot-water fixture so you know whether the issue is one faucet or the whole home.
Water heater problem help
A sudden loss of hot water may involve power, gas supply, a failed heating component, thermostat trouble, sediment, or a leaking tank. Avoid opening panels or relighting equipment unless the manufacturer’s instructions clearly permit it.
Test more than one hot-water fixture so you know whether the issue is one faucet or the whole home.
Check the floor and visible connections without touching hot surfaces or electrical components.
Record what the display shows. Do not remove covers or bypass safety controls.
If you smell gas, leave the area and contact the gas utility or emergency services from a safe location.
No hot water alone may be schedulable, but active leaking, scorched wiring, a gas odor, popping with water discharge, or water near electrical equipment deserves faster attention.
✓ Do not repeatedly reset a tripping breaker
✓ Do not seal a temperature-pressure relief valve
✓ Keep children away from leaking or overheated equipment
✓ Photograph labels and error codes when safe