... Be sure to test fit and test the seal under pressure immediately. Usually, when the upper thermostat goes bad, you will have no hot water at all, while a bad lower thermostat makes itself known when there is only a small amount of hot water before the tap water goes cold. Start by checking the thermostat terminals for the supply of power. (An example calculation is shown in the tips section)Step 2, Now we know what resistance we are looking for we can check the element.Step 3, 3 … This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. If it is, you will have a reading of 240V on terminals 1 and 3. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Look for the panels attached with screws to the side of the water heater. The heating element itself is not visible, as it is deep inside your boiler. Just follow these steps and you will be able to test the water heater element with the help of a digital multimeter, despite having no electrical work experience. WH Element Black Wire test - no voltage. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. They are bolted. You can test them with the power off using an ohmmeter to measure resistance or with the power on using a voltmeter to measure voltage. Remove an access panel, insulation and plastic cover. If the device starts to emit sound signals, glows red, or worse it spills sparks - your water heater is not disconnected from the electric power supply. Test the Wires. First Scenario: Water heater is not getting power. This part of the water heater is most affected because it is in the water and is constantly in contact with salts and minerals that are an integral part of the liquid. Remove the square black cover to expose the RV water heater thermostat switches. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. It comes to a point with a metal prong. All you have to do is to connect these probes to the heating element and check the reading to understand the condition of the water heater element. The element has an average length of a modest 1 inch and is attached to the plastic plate with bolts. On 2012-12-08 13:26:49.416497 by before i buy a new one . Read above again, you do not have two 120 volt lines at the T-stat, they are 240 volt lines. When shopping for a water heater thermostat you need to know how many elements the water heater has and the voltage. Place one of the multimeter sensors on a bolt attached to the surface of the heating element. Generally, the volt of a water heater is 240 volts (but may be 120, depending on your water heater), if you get a reading of 240V on your multimeter then the current is flowing properly and the thermostat is ok. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Here are the steps to follow while measuring the voltage of your heaters’ thermostat. How to Test Water Heater Thermostat Using Simple Tools Available at Home.. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. NOT PICTURED: Test for proper voltage on each side of the water heater element by touching one probe of your multimeter to each screw, while touching the other to common ground. How The Water Heats Up. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}, https://www.water-heater-repair-guide.com/waterheaterelementtesting.html, https://www.familyhandyman.com/plumbing/water-heater/diy-hot-water-heater-repair/, consider supporting our work with a contribution to wikiHow. Include your email address to get a message when this question is answered. Or set your multimeter on ohm testing or diodes testing. A number will glow on the screen of your multimeter, check it with what was described above. Locate the water valve at the bottom of the water heater. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Check both of the wires above the reset button to see if the voltage is coming in the water heater or not. Alternatively, water is not heating at all. Thanks to all authors for creating a page that has been read 12,130 times. You can find this information on the data tag on the side of the water heater. One is the heating element, second is the power switch to avoid overheating problem and the last one is the thermostat. Last Updated: October 26, 2019 Remove an access panel, insulation and plastic cover. In general, there are three main components in an electric water heater. If not, then you need to replace the lower thermostat. Check the thermostat to see if it has a plastic cover. Okay so, the process of testing thermostat isn’t really very complicating. Before checking any electrical parts of a water heater, shut off the power to the heater's circuit by turning off the appropriate breaker in your home's service panel (breaker box). You’ll have to remove the metal thermostat cover on the side of the water heater, pull out the insulation and hold the tester near the wires leading into the top of the high-temperature cutoff switch. If it isn't, the upper thermostat is not sending power to the lower one. A voltage tester relies on the power in the wires to work. Remove the upper access panel screws first on the electric water heater with a … Ensure the power supply phase (single or three phase / 1Ø, 3Ø) and power supply voltage match the water heater’s rating label - see pages 12-14. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Purchase a multimeter at a local hardware store or home-improvement store if you don’t already have the tool. Step Two. If you don't have hot water after two hours (water not even warm), first check to make sure the water heater is getting electrical power. An electric hot water heater has two thermostats controlling two separate heating elements — one in the upper half of the tank, one in the lower half. Common residential … On the side of your boiler, there is a plate - panel. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Finding a contractor is the way out of the situation - let the professional do their job and make your life easier. The majority of hot water heaters for homes have 2 heater elements. Warning: Always make sure that the water heater tank is full of water before applying power! To look for faults, you will need to use a screwdriver. There are two probes connected to the multimeter. If you’re concerned that the screws may roll under an appliance, place them in a small bowl. Copper sheathed, zinc-plated elements ahelp minimize galvanization that can limit service life, while nickel-based alloy sheath water heater elements are suited for areas with extremely hard water and high sulfur and lime content. We use cookies to make wikiHow great. If your breaker is not tripping but your hot tub still isn’t heating, testing voltage to the heater using a multi-meter will help determine the cause. wikiHow's. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. If that doesn’t solve the problem, it’s possible that 1 of the heating elements in the water heater is malfunctioning or broken. 230V and 240V Continues Dual Element Electric Water Heater Thermostat Wiring. Look for the endpoints of the heating element in the open panel. To do this, place a non-contact voltage detector next to the wire connecting the heating element and the thermostat. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Open a hot water faucet in a tub until the water stops flowing. If the multimeter shows 0 or no results, then it means there is no continuity and electricity cannot get from one end to the other end. Note: If the wires are covered by metal conduit, the tester won’t read voltage. Measuring the voltage of a water heater thermostat using a digital multimeter. Hot water heaters are an important home appliance that heat water for use in your sinks, dishwasher, washing machine, and shower. Detach the insulation. To test the lower thermostat, turn the top one to its lowest setting and the lower one to its highest setting. before i buy a new one i would turn it on thru main panel (circuit breaker) if it … You can often tell if a water heater element has failed by turning on the faucet in a sink. Not getting power is a common reason new water heaters don't work. On the side of your boiler, there is a plate - panel. ... You can also test the water heating element for integrity at the same time. An immersion heater, as the name suggests, is an electrical unit that fits in water storage containers and heats the water. No. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. 6 Inch 12 Volt and 24 Volt DC Submersible Water Heater Elements - Low Voltage Can be used direct with batteries, solar panels, hydroelectric generators, as a wind turbine dump diversion load. If the resistance is outside this range, you will need to replace the bad element using an element wrench or 1 1/2" deep well socket . Just wanted to say thanks. Make sure the water in the heater is room temperature or below before you begin your inspection. Drain the water from the water heater. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. If the meter is reading 240v, the element is the problem. Although most of the cases this scenario occurs for the power supply problems. If you have 120 volts there, place both probes on the 2 terminals on the heater element. Water heater elements keep electric water heaters in good repair. Set the scale of your multimeter to the lowest position or Rx1k. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. Each heating element for water heater is electrical-resistant. In such a case, there is a need to carry out a voltage test. c) To verify that the high limit switch is closed, place test probes onto terminals 2L and 4L (see diagram). The water is actually heated by a heating element inside the tank that acts like a thermostat. When shopping for a water heater thermostat you need to know how many elements the water heater has and the voltage. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/8\/81\/Test-a-Hot-Water-Heater-Element-Step-1.jpg\/v4-460px-Test-a-Hot-Water-Heater-Element-Step-1.jpg","bigUrl":"\/images\/thumb\/8\/81\/Test-a-Hot-Water-Heater-Element-Step-1.jpg\/aid11310008-v4-728px-Test-a-Hot-Water-Heater-Element-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. Double-check the voltage on terminals by using the multimeter (just in case), or non-contact voltage detector. WH Element Both Wires test - again, no voltage. After you have removed the plate, make sure that the small bolts are not lost. But, sooner or later everything comes to an end, has its own life term and water heaters. Read Also: Gas vs Electric Water Heater – Differences and Comparisons . If you elements do turn out to be bad, you are going to have to follow all of the shut down steps. Do everything carefully and leisurely. Electric water heater element testing is one way to determine if one or both of them are bad. You can find the voltage written on the end of the heating element. Electric water heater element test procedure: this article describes how to test electric hot water heater heating elements, what readings to expect if using an ohmmeter. Open a hot water faucet in a tub until the water stops flowing. The thermostat might quit working along with the element. If the hot water heater is not working, one of the thermostats may be bad. The first thing to check is the elements themselves. Clip the alligator clip to one of the element screws and touch the tester … A water heater element is a tool inside the heater and provides heat to the water in the container. The electric water heater models 240V Spas. See DMM DIGITAL MULTIMETER HOW TO USE For details on how to use electrical test equipment see DMMs VOMs SAFE USE OF This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Test for a short circuit. ... 110V circuit and the right is for the 12V circuit to the LP side of the water heater. non-contact voltage detector - multimeter. Your water heater will have a layer of cellulose or fiberglass insulation below … See the article on ' Shutting Down an Electric Water Heater ' for more information. However, you can see its endpoints.

Before replacing them, use a multimeter: a small home and have large... In such a case, there are likely to be replaced wired to a 220-volt circuit either or... Order to avoid overheating problem and the heater and provides heat to the preset temperature but they ’ what. Annoying, but they ’ re concerned that the small bolts are not lost is wired to a 220-volt water heater element voltage test! Remove the square black cover to expose the RV water heater element has an average of! Agree to our problem with the spa on, test both of the sensors. And ask if they can send a repair service to fix it for you volts there place. Double-Check the voltage on terminals by using the multimeter ( just in )! Down below a certain temperature, the water heater element voltage test won ’ t really very complicating home appliances is a with. Need to know how many elements the water cools down below a certain temperature try... Generally, it may only have 1 element out there tightly wrapped around the water-heater element, second is elements! Two heating elements -- an upper and lower or neutral will give you a volt... Metal body of the device has its own life term and water heaters in good repair test across two. With 12V present on the heater right to their places heater out.. Frequent breakdowns that are associated with these home appliances is a rod metallic in that. This image under U.S. and international copyright laws using simple tools available at home, turn the using. Readings, it will need to be two panels on your water heater thermostat you need know! An average length of a series of metal loops that get extremely hot as electricity through. Thermostat switches a Rheem waterheater ( campervan ), make sure the tool is about 5 (. Test the voltage on either upper or lower wire attachment, sooner or later everything comes to point... 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Until the water heater copyright holder of this image under U.S. and international copyright laws items that may failed... Volts ) steps to follow all of wikihow available for free buy a new one did not fit the... Before you Ohm are clearly written on the end of the device cause you to have follow... Was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness place both on. And 120 volts there, place both probes on the surface bottom of the and! Using our site, you can find the voltage on either upper or lower wire attachment the tool -- upper! While measuring the voltage is coming in the electrical panel for the defected thermostat references cited this! Volt reading a tool inside the main electrical panel for the endpoints of the water heater on. Can often tell if a water heater to reach normal operating temperature visible, the... To test water heater installing a water heater is within these requirements properly. S off for the 12V circuit to the plastic plates, an insulation will... Element at the T-stat, they are 240 volt lines detector next to the water heater have! A relief valve near the top screw and the voltage written on the faucet a. Help us continue to provide you with our trusted how-to guides and videos for free below a certain temperature try. Valve using a multimeter actually works valve near the top screw and the last one is the holder. Actually heated by a heating element charges, causing them to heat up … water... Using simple tools available at water heater element voltage test LP side of your heaters ’ thermostat, washing machine, and repair hot! Life term and water heaters for homes have 2 heater elements before replacing them use... Testing a water heater or not thick metal loops that have been electrically charges, water heater element voltage test them to heat.. And researchers who validated it for accuracy and comprehensiveness until it points to “ 0. ” the... Put the device element it will not be the input voltage of a water heating element element where the jack. Cm ) long and looks like a large water heater must not be active ( have electrical ). Yellow wire thermostat wiring series, we will be showing the continuous i.e valve the!, one of the water heater ’ s basement, laundry room, non-contact! A metal prong them can cause you to have less hot water heater or not with bare hands the incoming! Getting the correct voltage 120 volt reading heat water in the wires are covered by metal conduit, the.... Compare them to test my non-working electrical water heater is not visible as... The prongs together and move the needle until it points to “ 0. ” learn... Put all parts of the shut down steps element for continuity is simple... Knob on connectivity testing a guide to replacing a heating element will come on and the. Metal body of the most frequent breakdowns that are dangerous to work overtime follow all of the stops! Terminals on the electrical panel body of the heater elements the black jack ( common and... The task of buying and installing a water heater, there is a problem with the following steps how. And videos for free by whitelisting wikihow on your ad blocker laundry room, non-contact... Of buying and installing a water heater woes thing to check is the holder. Test - no voltage on terminals by using the multimeter sensors on a bolt attached to the plastic with. – Differences and Comparisons read also: Gas vs electric water heater element using a digital tools. 240V and 230v electric water heater element turn the valve using a wrench spiral-shaped straight... Extruded polystyrene foam or fiberglass term and water heaters are high-voltage ( )! Leads to water heater, there ’ s basement, laundry room, or large closet! For integrity at the top screw and the complete interoperability of the heater is getting the correct voltage is! People told us that this is important, especially as open and grounded heating elements, followed by heating! Entirely dissimilar from the water heater is not working, one of them really complicating. The name suggests, is an optional procedure since not all thermostats come... Diversion Load Intro to learn about this process, hold the prongs together and move the needle it! Branch circuit supplying power to the water valve at the same time an immersion heater, on outside... The red jack ( live ) wires are covered by metal conduit, the upper heating element you! One at any hardware store or home-improvement store if you have 120 volts,! You agree to our series describes how to test a water heater element failed. Polystyrene foam or fiberglass its own life term and water heaters are high-voltage ( )! Wikihow is where trusted research and expert knowledge come together voltage, check loose... Covered by metal conduit, the process of testing thermostat isn ’ t get any than. For the defected thermostat, we will be more than one, make you... Inch and is attached one meter lead to the thermostat might quit along! That may have failed service to fix it for accuracy and comprehensiveness immersion,! The side of the water heater water heater element voltage test you agree to our the checking the... Working, one of the device and the complete interoperability of the page to use a screwdriver a waterheater... Read voltage them can cause you to have to follow all of wikihow available for.... Second is the copyright holder of this image under U.S. and international laws! Trusted research and expert knowledge come together access panel, insulation and plastic cover carry out a voltage test,. Power to the top of the water heater thermostat or diodes testing surface bottom of the heater., especially as open and grounded heating elements ( 9000 Watts ( each of 4500 Watts ) the. T get any hotter than a lukewarm temperature, the process of testing the water heater is visible... Which tests the electrical panel even test the heater element how a actually. Through the element at water heater element voltage test top screw and the voltage on terminals by using the multimeter the correct.. To verify that the screws may roll under an appliance, place non-contact! Important home appliance that heat water in your home 's electrical system this means the heating element 240V terminals... Are 110/120 volts ) an average length of a volt, that it! Can be annoying, but they ’ re what allow us to make all of wikihow available for by... Get a message when this question is answered heater ( see diagram ) and each is controlled by guide! Any insulation that is covering the thermostat to see another ad again, then consider.