Water Heater Not Working? Troubleshooting No Hot Water
November 9, 2026
The short version: no hot water usually traces to a tripped breaker or pilot (power), a failed heating element or thermostat, or sediment buildup. A leak means call a pro. Mechanical failures are covered by a home warranty — the water heater is on most basic plans.
No hot water at all
- Electric: check the breaker and press the reset button on the thermostat. If it trips again, a heating element or thermostat has likely failed.
- Gas: check the pilot light or igniter and the gas supply. A failed thermocouple is common.
Not enough hot water
- Sediment buildup in the tank (flush it).
- A failed lower heating element (electric).
- Tank too small for demand, or a dip tube problem.
Water heater leaking
A leaking tank usually means the tank itself has corroded through — that's a replacement, not a repair. Shut off the water and power and call a professional.
When a home warranty covers it
Mechanical failures — heating elements, thermostats, thermocouple, valves — are covered; the water heater is included on most Basic Plans. You file a claim, a licensed plumber is dispatched, you pay the service fee, and your plan covers the covered repair or replacement. See does a home warranty cover your water heater. Not covered: a tank that failed from never being flushed (maintenance).
Key takeaways
- No hot water? Check the breaker/pilot and the reset button first.
- Elements, thermostats, and thermocouples are covered on most basic plans.
- A leaking tank is a replacement — shut it down and call a pro.
Want your water heater covered? Get a free, no-obligation quote.
Frequently asked questions
Why do I have no hot water all of a sudden? Electric: a tripped breaker or a failed heating element or thermostat. Gas: a pilot light out or a bad thermocouple. Start with the breaker or pilot.
Does a home warranty cover a water heater replacement? Yes — if a covered water heater can't be repaired, the plan replaces it up to your plan's terms, minus the service fee.