Repairing Guides

how to repair electric water heater

by Oral Kerluke Published 3 years ago Updated 2 years ago
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  • Turn off the power of the water heater from the service panel.
  • Remove the water heater access panel, insulation, & plastic safety guard.
  • Check both the thermostat for temperature settings set or if it has got any fault using a voltage tester. ...
  • Configure the appropriate temperature on the thermostat.
  • Re-install the insulation, safety guard, & access panel.
  • Power on the water heater again from the service panel.

Full Answer

How do you turn on an electric water heater?

Turning on Electric or Tankless Water Heaters

  1. Turn on the Breaker for the Hot Water Tank After you make sure your tank is full of water, turn on the breaker that controls your water heater.
  2. Simply Wait for the Water to Heat After you turn on the breaker, the next step is to wait for your water heater tank to heat up. ...
  3. Confirm the Temperature

Why is my electric water heater not working?

  • Make sure that gas and water are open and electricity is ON (120 VAC supply).
  • Confirm that the correct gas type (natural gas or LP) is used.
  • Make sure the pressure is per specs.
  • Verify that all air was purged from the gas line and after the installation.
  • Make sure plumbing is installed correctly, per codes and manufacturer’s instructions.

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How do you troubleshoot an electric hot water heater?

  • Turn off the breaker to the water heater's circuit in the service panel.
  • Remove the access panel for the upper heating element on the water heater.
  • Remove the insulation and the plastic safety guard, being careful not to touch any wires or electrical terminals.

More items...

How do I replace my water heater?

  • Smell of gas near the water heater; if you notice the smell of gas, immediately shut off the gas supply and call for service/replacement.
  • Water buildup in or around your water heater
  • Water-quality issues, such as rust or sediment visible in your water supply
  • Small plastic pieces in water coming from your faucets

More items...

How to reset a water heater if the breaker has tripped?

Why does my water heater not heat?

How to check thermostat on water heater?

Why does my water smell like rotten eggs?

What is the difference between a gas water heater and an electric water heater?

Why is my water leak?

Why does my shower have lukewarm water?

See more

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How do I fix my electric hot water heater?

0:108:34No Hot Water: Electric Water Heater Troubleshooting - YouTubeYouTubeStart of suggested clipEnd of suggested clipBoth house circuit breakers for the water heater. It's often hard to spot a trip breaker. WeMoreBoth house circuit breakers for the water heater. It's often hard to spot a trip breaker. We recommend that you shut off both breakers for the water heater.

What is the most common problem with electric water heaters?

Water leaks are perhaps the most common type of water heater issue you'll face. Any water heater will start to leak eventually, as by nature water will eventually corrode your tank and create microscopic cracks or fractures.

What causes an electric hot water heater to stop working?

If an electric water heater is not producing hot water, it could be a simple problem like a blown fuse or tripped circuit breaker. Additionally, some electric water heaters have a circuit-style safety switch located near or on the thermostat.

How do I know if my electric water heater element is bad?

Touch a probe on the multitester to each screw on the element. If you get no reading, or a maximum reading, the element is bad. Elements do have some resistance, so a reading of 10-16 ohms is normal, with higher ohm readings for 3,500 watt elements and lower readings for 5,500 watt elements.

Do all electric water heaters have a reset button?

Somewhere on your electric water heater, you'll find a reset button. It's usually red and often located near the thermostat. It may also be hidden behind a removable metal panel on the unit—and then behind some insulation. Once you find the button, push and release it.

How do you check an electric hot water heater?

12:5827:53How To Check Electric Water Heater Elements & Thermostats ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo we have full power coming into this unit you can also check from each leg to ground if you feelMoreSo we have full power coming into this unit you can also check from each leg to ground if you feel like it this is going to just make sure that we have our 120 volts on each leg.

Is there a fuse in an electric water heater?

The heater is usually fused in the main electrical panel but some electric water heaters may be fed from a separate fuse or circuit breaker box. If the fuse is blown or breaker is tripped, replace the fuse or re-set the circuit breaker.

What trips the reset button on a hot water heater?

The high resistance caused by a loose wire produces a substantial amount of heat that can eventually cause fires. If there is a loose electrical connection within your water heater's system, your reset button's thermometer can trip (regardless of the water's temperature) if it picks up the heat from that loose wire.

How do you replace a water heater element without draining it?

0:513:24Change a hot water heater element without draining or spilling waterYouTubeStart of suggested clipEnd of suggested clipThe hot water side. And turn the hot water side on so that that's relieving the pressure at thatMoreThe hot water side. And turn the hot water side on so that that's relieving the pressure at that point your pressure is relieved from the tank. And you can go ahead and remove your element.

How much does it cost to replace a water heater element?

A water heater element can cost between $10 and $60 and can be found at most home improvement stores.

How do I know if my water heater element is burnt out?

1:104:34How To Tell If Your Water Heater Element is Bad - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf it's in most of the time of water heater element it's not going to give you a reading it's eitherMoreIf it's in most of the time of water heater element it's not going to give you a reading it's either going to be good or bad. So. I have zero ohms of resistance. And. I also have zero tone.

What trips the reset button on a hot water heater?

The high resistance caused by a loose wire produces a substantial amount of heat that can eventually cause fires. If there is a loose electrical connection within your water heater's system, your reset button's thermometer can trip (regardless of the water's temperature) if it picks up the heat from that loose wire.

How do you diagnose a water heater problem?

A water heater that produces no hot water may not be getting power, may have a tripped limit switch, or may have one or more failed heating elements. First, check the water heater's circuit breaker in the service panel to make sure it hasn't tripped. If the breaker has tripped, switch it off, then switch it back on.

How long does a water heater last?

If your water heater is more than 10 years old, it's probably reaching the end of its lifespan. Most conventional electric hot water tanks will last 10-15 years maximum. Gas-powered hot water tanks usually breakdown after 8-10 years, while tankless water heaters can last over 15 years with regular maintenance.

Should You Repair & Troubleshoot The Problems of An Electric Water Heater?

We recommend that only a professional attempt to repair a water heater!

No Hot Water

No hot water in the house is a common problem has seen with water heaters. A water heater that produces no hot water may not have enough power supply, may have a tripped limit switch or may have bad heating elements.

Insufficient Hot Water Supply

If your water heater is not producing sufficient hot water according to your needs, this could be because it’s either too small of a water tank or the heater is on its way out.

Water Temperature is Too Hot

Another common water heating issue that, your water heater scalding temperature, which can be harmful. It is likely due to the wrong thermostat temperature settings or a malfunctioned thermostat.

Your Water Heater Sprung a Leak

Any water leakage from the water heater needs to be addressed immediately. This is a clear sign of fixing the water heater immediately, or it needs a replacement. Otherwise, it will become a mess in a given time.

Water Discolored or Smells Bad

The least common problem is if water from your water heater is discolored and your faucet water is a yellow, brown, or red type of color or has unusual odors. If the water heater is smelling like rotten eggs, it’s likely due to the bacteria growing in the water heater, which is harmful.

Water Heater Tank Making Noise

Is your water heater making unfamiliar noises? Sometimes the water heater makes disturbing noises which could be due to the sound of boiling water. The calcium and lime are formed in the bottom of the burner in the hot water tank, and as the hot water tank heats up, those calcium build-ups can make a sound like making popcorn.

What to do if line voltage is not found?

If line voltage not found and the tank is cool, replace lower thermostat. 43. If line voltage is found, wait for water to heat or perform the Ohms (or Resistance) checks on the elements once more with the power off. If line voltage is present on a heating element, it must heat the water unless the element has failed.

How do I shut off a water heater?

Shut off power in the electrical panel by removing fuses or by moving the handle of a switch or circuit breaker dedicated to the water heater to the Off position.

Why does my water heater leak?

Water heaters can leak as a result of a failing tank - but also due to poorly fitted or soldered cold water supply pipe / hot water output pipe or a poor seal between tank opening and heating element. If allowed to continue to leak, it will cause internal damage to the controls should water enter them.

How do heating elements work?

The heating elements protrude into the tank and are immersed directly in the water of the tank. For this reason, the water level in the tank must be lowered to a point below the level of the element to be removed (otherwise water will leak out as the element is removed).

What does black carbon on a wire mean?

This can lead to potentially deadly shocks, heating and melting insulation and even burns. Sooty, black carbon deposits on surfaces indicate a short circuit. Chances are there is an exposed copper wire that may be difficult to see due to the carbon deposits that resulted from the short circuit.

What is the upper control on a water heater?

The "upper controls" consist of the High-Temperature Limit Switch and Upper Thermostat. The "lower controls" refers to the Lower Thermostat (there is no High-Temperature Limit Switch for the lower section of most electric water heaters).

How many references are there in wikihow?

To create this article, 34 people, some anonymous, worked to edit and improve it over time. There are 10 references cited in this article, which can be found at the bottom of the page.

What is a red reset switch?

Electrical wires bringing power to the heating element. A red "reset switch" for the electric water heating element control. Electrical wires taking electrical power out of the thermostat control and into the electrical heating element itself. The electric water heater temperature setting dial.

What does the lower thermostat switch do on a water heater?

The lower thermostat switch will turns on the lower heating element and that in turn heats water in the bottom of the water heater until that water reaches the temperature setting on the lower thermostat. Now the whole water heater is "hot". Of course life is more complicated.

How many thermostats does an electric water heater have?

Electric water heaters usually have two thermostats, and to heating elements: an upper thermostat located behind a cover high on the heater tank, and a lower thermostat located behind a panel low on the water heater tank (photo at left).

What happens if you turn on an electric water heater?

Watch out: turning on electrical power to an electric water heater if the heater's elements are not under-water, that is if there is air in the water heater cylinder or tank will usually result in an immediate burn-up and desctruction of the water heater elements.

What happens when the upper element of a water heater burns out?

Usually if the upper element has burned out you'll find that the quantity of hot water has not been reduced as much as you'll observe that the water provided by the heater is tepid.

What is a flip flop water heater?

Most electric water heaters are what we call "flip flop" or "non-simultaneous" electric water heater systems, meaning that just one of the two heating elements is working at a time.

What is sequence operation in water heaters?

Most Electric Residential Water Heaters are Sequential Operation where the upper element comes on first until the thermostat is satisfied then the upper T-Stat switches power to the to the lower element & T-Stat. Upper T-Stat has priority.

What happens if a water heater starts to leak?

When a water heater starts to leak, the mere thought of a repair can be scary. A small leak can be a sign that a bigger problem may exist. If left unattended, a small leak can turn into a catastrophic failure which could lead to severe water damage to the living areas inside your house.

Where is the leak in an electric water heater?

If you have an electric water heater, the leak may be present at the top or bottom heating element. Each heating element has a seal that over time becomes worn causing it to leak. While this isn’t very common, it does happen and deserves to be checked.

What does it mean when a water heater is leaking from the bottom?

What if my water heater is leaking from the bottom? If your water heater is leaking from the bottom, it may be leaking from the drain valve or the internal tank. Drain valves can usually be repaired. However, if the internal tank is leaking, the only repair is to replace the water heater.

Why does my water heater drain?

Typically if a drain valve begins to leak it’s usually because there is debris or sediment lodged in the drain valve or the drain valve is faulty.

How to check if water heater is gas?

If your water heater is a gas unit, set the fuel knob to pilot or a vacation mode. Dry up as much of the water as possible and do a visual inspection of the water heater for oblivious signs of leakage. Allow the water heater to sit for several hours to see if the water returns.

Why do water heaters have expansion tanks?

If you own a water heater, the water inside will expand when heated. An expansion tank helps relieve pressure inside the water heater by providing a space for hot water to expand and release the...

How much does it cost to install a water heater?

If you are planning to buy and install a water heater yourself, you can expect to pay between $350 to $2000 depending on the size and type of water heater you decide to purchase. The average tank-style 50-gallon water heater costs between $600 to $700.

How to reset a water heater if the breaker has tripped?

If the heater's breaker did not trip (if it is still on), try to reset the high-temperature limit on the heater: Turn off the breaker to the water heater's circuit in the service panel. Remove the access panel for the upper heating element on the water heater.

Why does my water heater not heat?

Other problems may be due to improper settings, high home water pressure, or a lack of tank maintenance. 2:21.

How to check thermostat on water heater?

To check the thermostat settings: Turn off the power to the water heater in the service panel. Remove the access panel, insulation, and plastic safety guard from each heating element on the water heater. Do not touch any wires or electrical terminals.

Why does my water smell like rotten eggs?

If your water comes out smelling like rotten eggs, there could be bacteria in the hot water heater tank.

What is the difference between a gas water heater and an electric water heater?

The main difference between electric and gas water heaters is the heat source. In an electric water heater, the water is heated by electric upper and lower heating elements that extend into the water tank. Gas water heaters have a gas burner that heats the water from below the tank. Problems with electric water heaters that produce little ...

Why is my water leak?

Water Leaks. Water leaks usually are caused by leaking valves and plumbing connections , but they can also be related to tank problems. Leaking water can cause significant damage to a home, so it is important to fix the leak as soon as possible.

Why does my shower have lukewarm water?

A constant supply of lukewarm water during a shower is indicative of a defective upper heating element.

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