No hot water is usually caused, on a gas water heater, by a pilot light or igniter that went out, a thermocouple, or a gas-supply issue; on an electric unit, by a tripped breaker, a failed heating element, or a thermostat. Check the breaker or that the pilot is lit and the gas is on, and confirm the thermostat setting. If it won't relight, leaks, or only makes lukewarm water, call First Response for same-day water heater repair in San Antonio.
Common causes
- Gas: pilot light or igniter out, bad thermocouple
- Electric: tripped breaker, failed element or thermostat
- Sediment buildup reducing capacity
- Leaking tank or failed gas valve
- Tankless error code or scale buildup
What to try, and when to call us
- Electric: check and reset the breaker
- Gas: confirm the gas is on and the pilot is lit
- Confirm the thermostat is set around 120°F
- Look for any leaking around the tank
If there is no hot water after that, or the tank leaks, call First Response for same-day water heater repair and replacement in San Antonio.
Frequently asked questions
Why did my pilot light go out?
Often a failing thermocouple, a draft, or a gas-supply dip. If it won't stay lit, the thermocouple or gas valve usually needs service.
Is a leaking water heater urgent?
Yes, a leaking tank can flood and worsen fast. Shut off the water and call us same day.
Repair or replace?
We give you both costs on-site, based on the unit's age and the failure.