By PlumberDallas.com editorialUpdated
Not sure this is your problem?Diagnose This Problem
Common causes
Pilot out or ignition failure (gas)
Thermocouple, flame sensor, or igniter problems.
Tripped breaker or reset (electric)
A high-limit switch may trip.
Failed heating element
Electric units often have two elements.
Gas supply off
Utility work or a closed valve.
Tankless error code
Often scale or ignition related.
What you can check yourself
- Check the gas valve is open, or that the breaker has not tripped.
- Relight the pilot following the label instructions only.
- Look for an error code on tankless units.
- Check whether the problem is the whole house or one faucet.
When to call a plumber
Call if the pilot will not stay lit, the breaker trips again, you smell gas (leave and call Atmos Energy), or the tank is leaking.
How a plumber diagnoses it
A plumber tests ignition, gas control, elements, and thermostats and gives you the unit’s age.
Related services
- Water Heater Repair in Dallas — Restore hot water and know whether repair makes sense.
- Water Heater Replacement in Dallas — Choose the right size, type, and installation.
- Tankless Water Heaters in Dallas — Endless hot water, sized and installed correctly.
What it may cost
See the water heater replacement cost guide for published price ranges and cost factors.
Frequently asked questions
Why does my hot water run out fast?
Sediment, a failed lower element, or an undersized heater.
Ready for a professional diagnosis? Learn about water heater repair in Dallas and request help.