No Hot Water – What to Check First

Short answer: If you suddenly have no hot water, the issue is often related to the water heater’s power source, thermostat, or internal components. Some checks are safe to do, but others require a licensed plumber.

What to check first (safe checks)

1. Check other fixtures. If only one faucet lacks hot water, the issue may be local.
2. Check the power source.
   • Electric heater: Check the breaker in the electrical panel.
   • Gas heater: Look for a pilot light (do not relight if you smell gas).
3. Check the thermostat setting on the water heater.
4. Look for leaks around the water heater.

Common causes of no hot water

• Tripped breaker or blown fuse (electric)
• Extinguished pilot light (gas)
• Faulty heating element or thermostat
• Gas supply issues
• Failed or aging water heater

When this becomes urgent

Call a plumber immediately if you smell gas, see water leaking from the heater, notice electrical burning smells, or the unit has shut down repeatedly.

What NOT to do

• Do not force-reset breakers repeatedly
• Do not relight a pilot light if you smell gas
• Do not ignore leaks or corrosion
• Do not attempt internal repairs without training

Local help in Orange County

El Gibbor Plumbing provides water heater diagnosis, repair, and replacement throughout Orange County, CA.

Need help today? Call (714) 964-9364 to schedule service.

Safety note: This page provides general guidance and does not replace professional service.