How do you know if you need a new electric water heater?

Author: Lonnie Corwin PhD  |  Last update: Tuesday, March 31, 2026

If your hot water is no longer coming out hot or is only hot some of the time, it may be time to replace the heater. Sometimes the devices and mechanisms inside will wear down or break, causing your heater to stop heating. In some cases, this may require a simple repair.

How do I know if my electric water heater needs to be replaced?

Common signs that it's time to replace your water heater include its age (usually 10-15 years), rusty or discolored water, strange noises, leaks or pooling water around the tank, and insufficient hot water supply.

How do you know when your electric hot water heater is going out?

Water heaters show several signs of going bad, including lack of hot water, temperature fluctuations, decreased water pressure, strange noises, rotten egg smell, visible leaks, rusty or discolored water, and increased energy bills. If your water heater is over 10 years old, it may be time to consider a replacement.

What is the life expectancy of an electric hot water heater?

While today's water heaters are better designed than older models, they still require regular maintenance in order to prolong their lives. With regular inspection, draining, and flushing, you can expect a gas water heater to last anywhere from 8-12 years and an electric water heater to last anywhere from 10-15 years.

How often should electric water heaters be replaced?

Water Heater Lifespan

If your tank water heater is more than 10 years old, it may be time to consider replacing it. With proper maintenance, a tank water heater tank should last six to 12 years. A tankless water heater can last for more than 20 years. Check your water heater's warranty for the most accurate timelines.

How To Know When You Need A New Water Heater

What is the average cost to replace an electric hot water heater?

The cost for an electric water heater replacement runs between $2,000 and $3,000, depending on the specific model and size you choose. Although you may purchase an electric water heater for a low price, they're typically more expensive to run than gas models.

How often do you have to flush an electric water heater?

Flush your water heater every six months or so. If you have harder water, or water that contains more minerals, you may want to flush it more often.

What shortens the life of a water heater?

Sediment can build up over time in a water heater, shortening its lifespan. To prevent this, you should flush your water heater at least once per year. Flushing will help to remove any sediment that has built up and improve the efficiency of your water heater.

What is the most reliable brand of hot water heater?

The Lifestory Research 2024 America's Most Trusted® Water Heater ranking is based on 6,547 opinions of people surveyed in the United States over the last 12 months. The most trusted water heater brands in order were Bosch, Whirlpool, Rheem, GE, Kenmore, AO Smith, Ruud, Bradford White, and Rinnai.

How do you check a electric water heater?

To test the element, use a voltmeter. Touch one probe to one screw of the element and the other to the opposite screw. A lack of resistance indicates a faulty element that needs replacing, while a resistance reading means it's functioning correctly. Repeat this process for the lower element.

How to tell if your anode rod is bad?

Poor water heater performance can sometimes stem from an anode rod that's overdue for replacement. If you notice signs of poor performance, such as discolored or rusty water, sulfuric or rotten egg smells, popping sounds from the tank, or high heating bills, inspect your water rod to determine if it needs replacement.

Should I replace my water heater before it fails?

A Corroded Water Heater Could Cause Significant Damage

If the tank rusts through, it could fail catastrophically and flood your home. You can avoid this disaster by replacing your water heater before it fails.

How to tell if a hot water heater is going bad?

7 Signs of Hot Water Heater Failure
  • Water Is Discolored or Gritty. Inside your hot water heater there is a component called an anode rod. ...
  • Hot Water Smells Off. ...
  • Tank Is Leaking Water. ...
  • Heating Process Makes Strange Sounds. ...
  • Hot Water Runs Out Too Quickly. ...
  • Water Never Gets Hot Enough. ...
  • There's No Hot Water At All.

Is it hard to replace electric hot water heater?

Installing a water heater isn't as simple as twisting and screwing a few tubes together to complete the project. Water heaters are usually connected directly to your home's plumbing and electrical systems. Installing all the necessary plumbing fittings can be quite complex.

Should I hear my electric water heater?

Crackling and hissing sounds are perfectly normal to hear every once in a while in electric water heaters. If the sound is happening a lot, you may need to drain your tank to see if there is something blocking your heating element.

Can a tank water heater last 20 years?

The life expectancy of a hot water tank varies depending on its size, how often it is used, and how well it is maintained. A standard 40-gallon tank will last between 10 and 15 years while larger tanks (50 gallons) have a lifespan of up to 20 years.

How to make an electric hot water heater last longer?

If you're ready to learn more, let's discuss how to extend the life of your water heater.
  1. Invest in Adequate Insulation. ...
  2. Flush the Tank Regularly. ...
  3. Install a Water Softener. ...
  4. Add an Expansion Tank. ...
  5. Inspect the T&P Valve. ...
  6. Check the Anode Rod. ...
  7. Schedule Maintenance With Faster Water Heater.

Do hot water tanks need to be serviced?

The short answer is yes: your hot water cylinder and your boiler should be serviced every 12 months.

Does Home Depot install water heaters?

The Home Depot partners with local, licensed and insured professionals to help homeowners choose the right water heater for their home. If you live within 30 miles of a Home Depot store and call us before noon at 1-800-HOME-DEPOT, our team offers same-day installation.

How much is labor to install a hot water heater?

Expect to pay $920 to $1,177 for electric water heater installation costs.

Is a 50 gallon water heater better than a 40-gallon?

If you are on a budget, a 40-gallon may be the better option for you. Water Heater Efficiency: When it comes to efficiency, a 50-gallon water heater is going to be more efficient than a 40-gallon water heater. This is because it will have a lower recovery time, which means it will take less time to heat the water.

What happens if you never flush your water heater?

-Reduced Efficiency: As scaling collects at the bottom of the tank, your water heater will become less effective at heating the water in the tank. -Corrosion: If your water heater goes long enough without a proper flush, you could also have corrosion attacking the tank itself, weakening its structural integrity.

How much does a plumber charge to flush a water heater?

The national average cost to flush a water heater is $160, but prices can vary in increments based on the tank size. A 30-gallon tank will cost between $90 and $120 on average, while a 70-gallon tank could cost anywhere between $180 and $250.

How do I know if my water heater needs to be flushed?

Keep an eye out for debris suddenly showing up in your water. If you notice sediment or any brown sludge coming out of your faucet, that's probably an indication that it's time for a water heater flush. If you see any of these signs, it's a good indication that your water heater needs maintenance.

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