Water Heater Troubleshooting Tips for Homeowners

Having trouble with your water heater? Before calling for service, there are a few safe checks homeowners can perform. These simple troubleshooting tips can help you understand what may be going on with your water heater and when it is time to call a licensed plumber.

Important: If you smell gas, see water leaking near electrical components, or notice burning smells, turn the system off if safe to do so and call a professional immediately.

No Hot Water

If your water heater is not producing hot water, start with the basics.

• Check that the thermostat is set correctly.
• For electric water heaters, check the breaker panel for a tripped breaker.
• For gas water heaters, verify the pilot light is lit if your model uses one.
• Make sure the gas valve is turned on.
• Check for error codes if you have a newer tank or tankless water heater.

Not Enough Hot Water

If your hot water runs out too quickly, your water heater may be undersized, aging, or struggling with sediment buildup.

• Wait to see if the tank reheats normally after heavy use.
• Check the thermostat setting.
• Consider whether your household hot water demand has increased.
• Sediment buildup may reduce tank capacity and heating performance.

Water Is Too Hot

Water that is too hot can be a safety concern. The thermostat may be set too high or may not be working properly.

• Check the temperature setting on the water heater.
• A common setting is around 120°F for many homes.
• If the temperature does not adjust correctly, call a plumber for service.

Water Heater Is Leaking

A leaking water heater should be addressed quickly to prevent water damage.

• Look for water around the base of the tank.
• Check connections at the top of the water heater.
• Inspect the drain valve for dripping.
• Check the temperature and pressure relief valve discharge line.
• If the tank itself is leaking, replacement is usually needed.

Rusty or Discolored Hot Water

Rust-colored hot water may point to corrosion inside the tank, aging plumbing, or an anode rod issue.

• Check if discoloration only happens on the hot water side.
• If both hot and cold water are discolored, the issue may be with the water supply or piping.
• Have the water heater inspected if rusty hot water continues.

Strange Noises from the Water Heater

Popping, rumbling, or cracking sounds are often caused by sediment buildup inside the tank.

• Sediment can make the water heater work harder.
• Noises may become worse as the tank ages.
• A professional flush or inspection may be needed.

Bad Smell from Hot Water

A rotten egg smell from hot water may be related to bacteria inside the tank or the anode rod.

• Confirm whether the smell is only from hot water.
• If only hot water smells, the water heater may need service.
• If all water smells, contact your water provider or a plumber.

Pilot Light Keeps Going Out

If your gas water heater pilot light will not stay lit, there may be a problem with the thermocouple, gas supply, or burner assembly.

• Follow the manufacturer’s relighting instructions.
• Do not keep trying if you smell gas.
• Call a licensed plumber if the pilot will not stay lit.

When to Call a Professional Plumber

Some water heater issues require professional service. Call Empire Plumbing & Air Conditioning if you notice:

• No hot water after basic checks
• Water leaking from the tank
• Rusty or discolored hot water
• Strange noises from the tank
• Gas smells or burner problems
• Repeated breaker trips
• Your water heater is over 10 years old and having issues

Schedule Water Heater Service in Phoenix, AZ

Empire Plumbing & Air Conditioning provides honest water heater repair, replacement, maintenance, and installation services throughout Phoenix and the surrounding Valley. Whether you have a traditional tank water heater or a tankless system, our licensed team can help diagnose the issue and provide upfront solutions.

Call (602) 275-8400 today to schedule water heater service.

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