No Hot Water in House? What to Check First
Short answerNo hot water usually means a tripped breaker or failed element on an electric water heater, or a gas supply, pilot or control valve problem on a gas one. Check the breaker and whether the tank simply ran out. Leave other repairs to a plumber, and get out and call from outside if you smell gas.
Safety first
- If you smell gas or rotten eggs, leave the house now and call 911 or the gas company from outside. Do not try to relight anything.
- Do not open the panels on an electric water heater. Parts can stay live even when the unit is not heating.
- Do not touch the pressure relief valve or hot pipes while the unit is running. Water and metal can scald you.
Likely causes
| Cause | How to tell | What fixes it |
|---|---|---|
| Tripped breaker (electric) | The whole tank is cold and the breaker is off or in the middle position. | Reset it once. If it trips again, call a plumber or electrician. |
| Failed heating element or thermostat (electric) | You run out of hot water fast, or the temperature swings, or there is none at all. | A pro tests and replaces the part. |
| Gas supply or pilot problem (gas) | There is no flame in the burner window, or the pilot will not stay lit. | A pro checks the gas supply, ignition and control valve. |
| Tank ran out | Hot water came back after a wait. One maker lists 30 to 40 minutes for gas tanks to recover and 60 to 90 for electric. | Wait and test. If it keeps happening, ask about sediment, the thermostat or tank size. |
Why this is a job for a professional
- The breaker trips again after one reset.
- There is a gas smell, a soot mark near the burner, or the pilot will not stay lit.
- The tank is leaking or the water is rusty.
- Ask: what failed, and is it worth fixing based on the age of my unit? What is the total price with parts? Will you test the relief valve and set the temperature to 120°F?
What it costs to have fixed
Water Heater Replacement is estimated at $750 to $2,050 nationally. See your state
Common questions
Why do I have no hot water in my whole house?
If every faucet is cold, the water heater is usually the problem. On electric units, check the breaker. On gas units, the gas supply, pilot or control valve are the usual causes. A plumber should handle anything past the breaker.
How long does a water heater take to get hot again?
One maker lists 30 to 40 minutes for a gas tank and 60 to 90 minutes for an electric tank after the hot water runs out.
Should I repair or replace my water heater?
Tank units last about 8 to 12 years on average. A unit over 10 years old with several problems, or any leak at the base of the tank, usually points to replacement.
How do I know my water heater is going bad?
A.O. Smith links popping or rumbling to sediment at the bottom of the tank, crackling or hissing to scale on electric elements, and discolored or smelly water to bacteria and a worn anode rod. We recommend having a plumber check it. If you smell gas, we recommend leaving first and calling from outside. Source
Related repairs
- Burst Pipe in House? What to Do First
- Clogged Drain? How to Unclog a Sink or Tub
- Frozen Pipes? How to Thaw Them Safely
- Garbage Disposal Not Working? Reset and Unjam It
- Leaky Faucet? How to Fix a Dripping Faucet
- Low Water Pressure in House? How to Find the Cause
- Sewer Smell in House? Causes and What to Do
- Toilet Keeps Running? How to Stop It Yourself
Last verified 2026-11-01
Sources
- HotWater.com: Why Your Water Heater Isn't Working — Causes for electric and gas units, recovery times of 30 to 40 and 60 to 90 minutes, the 120 degree setting, and safety notes on power, heat and gas odor
- HotWater.com: When to Repair or Replace — Average life of 8 to 12 years and when replacement makes more sense
- NC State Extension: Preventative Home Maintenance — Checking the tank for leaks or rust
- Wisconsin Public Service Commission: Natural Gas Consumer Safety — Leaving and calling from a safe distance if you smell gas
General information, not professional advice. Conditions, codes and prices vary. Turn off power, gas or water before any work, and hire a licensed professional when in doubt. Cost figures are our estimates, not quotes.