{"id":11741,"date":"2025-03-07T05:47:56","date_gmt":"2025-03-07T13:47:56","guid":{"rendered":"https:\/\/www.appliancepartspros.com\/b\/?p=11741"},"modified":"2025-03-07T05:48:06","modified_gmt":"2025-03-07T13:48:06","slug":"how-to-troubleshoot-and-fix-a-water-heater-that-wont-heat","status":"publish","type":"post","link":"https:\/\/www.appliancepartspros.com\/c\/how-to-troubleshoot-and-fix-a-water-heater-that-wont-heat\/","title":{"rendered":"How to Troubleshoot and Fix a Water Heater That Won\u2019t Heat"},"content":{"rendered":"<div  class='avia-image-container  av-styling-    avia-builder-el-0  el_before_av_textblock  avia-builder-el-first  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img fetchpriority=\"high\" fetchpriority=\"high\" decoding=\"async\" class='wp-image-11748 avia-img-lazy-loading-not-11748 avia_image' src=\"https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1.jpg\" alt='' title='Updated blog rectangle (30)' height=\"500\" width=\"1600\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1.jpg 1600w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-300x94.jpg 300w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-1030x322.jpg 1030w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-768x240.jpg 768w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-1536x480.jpg 1536w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-1500x469.jpg 1500w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2024\/10\/Updated-blog-rectangle-30-1-705x220.jpg 705w\" sizes=\"(max-width: 1600px) 100vw, 1600px\" \/><\/div><\/div><\/div>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><p><span style=\"font-weight: 400\">A sudden lack of hot water can be frustrating, especially when your water heater stopped heating at the most inconvenient time. Whether you\u2019re dealing with an electric or gas unit, this guide will help you understand common reasons why a water heater stopped heating and how you can troubleshoot and fix the problem yourself.<\/span><\/p>\n<p><span style=\"font-weight: 400\">If you need any replacement parts for your appliances, you can enter your <\/span><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-find-your-appliances-model-number\/\"><b>model number<\/b><\/a><span style=\"font-weight: 400\"> at<\/span> <a href=\"https:\/\/www.appliancepartspros.com\/\"><b>AppliancePartsPros.com<\/b><\/a><span style=\"font-weight: 400\"> to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.<\/span><\/p>\n<p><b><i>Important:<\/i><\/b><i><span style=\"font-weight: 400\"> The troubleshooting information provided in this article is based on general service manuals and may not apply to your specific appliance model. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.<\/span><\/i><\/p>\n\n<h2><span style=\"font-weight: 400\">Common causes for a water heater that won&#8217;t heat<\/span><\/h2>\n<p><span style=\"font-weight: 400\">There are several common issues that can cause a water heater to stop heating water. Let\u2019s dive into the most frequent culprits for both gas and electric water heaters.<\/span><\/p>\n<h3><span style=\"font-weight: 400\">Electric water heater\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400\">If your electric water heater won\u2019t heat, here are some possible reasons for the malfunction:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Blown fuse or tripped breaker: One of the most common reasons your electric water heater will not heat is due to a blown water heater fuse or a tripped breaker. Start by checking your circuit breaker panel for a tripped breaker or a blown hot water heater fuse. If your unit is running on a 240v power supply, it requires two breakers. Make sure both are fully switched on.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Faulty heating elements: Electric water heaters rely on heating elements to warm the water. If one or both of these elements fail, you\u2019ll quickly notice that your 240v water heater stopped working. Testing and replacing the heating element could fix the issue.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Thermostat failure: Another common reason your water heater stopped heating could be a malfunctioning thermostat. The thermostat regulates the water temperature inside the tank. If it\u2019s not working, the water heater won\u2019t turn on to heat the water.<\/span><\/li>\n<\/ul>\n<p><b>Read more: <\/b><a href=\"https:\/\/www.appliancepartspros.com\/b\/why-your-water-heater-smells-like-rotten-eggs-and-how-to-fix-it\/\"><b>Why your water heater smells like rotten eggs and how to fix it<\/b><\/a><\/p>\n<h3><span style=\"font-weight: 400\">Gas water heater<\/span><\/h3>\n<p><span style=\"font-weight: 400\">Gas water heaters face different challenges than electric units. Here\u2019s what could be wrong if your gas hot water heater stopped working:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Pilot light issues: One of the first things to check when your gas water heater stopped heating water is whether the pilot light is on. A draft, faulty thermocouple, or gas supply issue could extinguish the pilot light, stopping your heater from working. If the water heater igniter won&#8217;t spark, the issue could be with the ignition system.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Faulty thermocouple: If your water heater keeps shutting off, it could be due to a bad thermocouple. This safety device turns off the gas supply if the pilot light goes out, but if it&#8217;s malfunctioning, it might mistakenly shut off the gas even when the light is still on.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Blocked or dirty burner: If the burner is dirty or clogged, your gas hot water heater stopped working because it\u2019s not able to generate enough heat. Cleaning or replacing the burner could solve this issue.<\/span><\/li>\n<\/ul>\n<p><b>Read more: <\/b><a href=\"https:\/\/www.appliancepartspros.com\/b\/common-gas-water-heater-problems-how-to-fix-them\/\"><b>Common gas water heater problems &amp; how to fix them<\/b><\/a><\/p>\n<h2><span style=\"font-weight: 400\">Safety precautions<\/span><\/h2>\n<p><span style=\"font-weight: 400\">When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Always power off and unplug your appliance or switch off the circuit breaker before attempting any maintenance or replacement work. This keeps you safe by preventing any risk of injury from electric shock.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Wear insulated work gloves to protect your hands from sharp metal parts, pinching hazards and debris.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Take your time and don\u2019t rush while working to prevent accidents and personal injuries.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Work in a well-lit area so you can clearly see and access the interior parts.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Clear your workspace of clutter and other obstacles. Keep children and pets away from the work area.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Never work on internal parts with bare wet hands. Make sure the work area is completely dry.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Check your user manual to see if there are specific installation or safety instructions for your part or appliance.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Be gentle when handling or removing parts. Excessive force might damage the appliance or cause injury.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Wear safety glasses when working with chemicals, dust or cleaning large debris to prevent injury.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the appliance has recently been used, give it plenty of time for any heating parts to cool down before working on it.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Take pictures or make a note of wiring terminals or other connections before disconnecting to prevent any problems with reassembly.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400\">General Troubleshooting Steps (For Both Gas and Electric Models)<\/span><\/h2>\n<p><b>Check the thermostat settings<\/b><span style=\"font-weight: 400\">:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Make sure the thermostat is set to a temperature high enough for heating (around 120\u00b0F is ideal).<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If it&#8217;s set too low, simply adjust it to a higher temperature.<\/span><\/li>\n<\/ol>\n<p><b>Inspect the circuit breaker (Electric Water Heaters)<\/b><span style=\"font-weight: 400\">:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If you have an electric water heater, check the circuit breaker to ensure it&#8217;s not tripped.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the breaker is tripped, reset it by switching it off and on again. If it continues to trip, it may indicate a problem with the heating elements or electrical wiring.<\/span><\/li>\n<\/ol>\n<p><b>Check the gas supply (Gas Water Heaters)<\/b><span style=\"font-weight: 400\">:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If you have a gas water heater, make sure the gas supply valve is turned on.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Check if other gas appliances in your home are working properly. If they aren\u2019t, there may be a problem with the gas supply.<\/span><\/li>\n<\/ol>\n<h3><span style=\"font-weight: 400\">For Gas Water Heaters<\/span><\/h3>\n<h4><b>Check the pilot light<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Turn off the gas supply and wait 5 minutes to clear any gas fumes.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Locate the pilot light assembly (usually near the bottom of the water heater).<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Follow the manufacturer\u2019s instructions to relight the pilot light. Generally, this involves pressing and holding the pilot button while using a match or lighter to ignite the flame.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Once the pilot is lit, release the button and ensure the flame stays on.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the pilot light doesn\u2019t stay lit, the thermocouple may be faulty.<\/span><\/li>\n<\/ol>\n<h4><b>Check the thermocouple<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The thermocouple is responsible for detecting the pilot light. If it\u2019s malfunctioning, the heater won\u2019t stay lit.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Use a multimeter to check the thermocouple for continuity.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the reading is negative or the thermocouple is visibly damaged, it will need to be replaced.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">To replace the thermocouple, turn off the gas, unscrew the old thermocouple, and screw in the new one, ensuring it&#8217;s positioned correctly in the pilot assembly.<\/span><\/li>\n<\/ol>\n<h4><b>Check the gas control valve<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the gas control valve isn\u2019t sending gas to the burner, the heater won\u2019t function.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Use a multimeter to check the continuity of the gas control valve.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If it\u2019s faulty, the valve will need to be replaced. Make sure to replace it with a model compatible with your water heater.<\/span><\/li>\n<\/ol>\n<h4><b>Inspect the burner<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Check if the burner is dirty or clogged with debris.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Turn off the gas and remove the burner.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Clean it with a brush or compressed air to remove dirt and debris.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Reinstall the burner and check for proper ignition.<\/span><\/li>\n<\/ol>\n<h3><span style=\"font-weight: 400\">For Electric Water Heaters<\/span><\/h3>\n<h4><b>Check the heating elements<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">A common cause of an electric water heater not heating is a faulty heating element.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Turn off the power to the water heater at the circuit breaker.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Remove the access panels to expose the heating elements.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Use a multimeter to check the heating elements for continuity.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the element does not show continuity, it needs to be replaced. To replace it, use a wrench to unscrew the faulty element, remove it, and screw in the new one.<\/span><\/li>\n<\/ol>\n<h4><b>Check the high-limit thermostat<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The high-limit thermostat prevents the water heater from overheating. If it\u2019s malfunctioning, it could prevent the heating elements from working.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Use a multimeter to check for continuity on the thermostat.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the thermostat does not show continuity or is visibly damaged, it will need to be replaced.<\/span><\/li>\n<\/ol>\n<h4><b>Check the temperature and pressure relief valve<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The T&amp;P valve releases excess pressure, but if it\u2019s faulty, it can prevent the water heater from functioning properly.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Turn off the power and water supply to the heater.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Inspect the T&amp;P valve for leaks or signs of malfunction.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If it&#8217;s faulty, replace it with a compatible valve.<\/span><\/li>\n<\/ol>\n<h4><b>Check for sediment buildup<\/b><\/h4>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Over time, mineral deposits can build up inside the tank and around the heating elements, reducing heating efficiency.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Turn off the power and water supply.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Drain the tank and flush it out to remove sediment.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If needed, clean the heating elements or replace them.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400\">If you&#8217;ve gone through all these steps and the heater is still not working, or if you need help finding replacement parts, visit our <\/span><a href=\"https:\/\/www.appliancepartspros.com\/repair-help\/\"><b>repair help section<\/b><\/a><span style=\"font-weight: 400\"> for more information and troubleshooting support.<\/span><\/p>\n<h2><span style=\"font-weight: 400\">Wrapping up<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Thanks for reading! If you have any other appliance repair needs or projects, you can find more resources including our DIY blog at <\/span><a href=\"https:\/\/www.appliancepartspros.com\/\"><b>AppliancePartsPros.com<\/b><\/a><span style=\"font-weight: 400\">. There, you can enter your model number to order the exact parts you need. Most orders arrive in two business days.<\/span><\/p>\n<p><span style=\"font-weight: 400\">You can also reach our award-winning customer service team at 1-877-477-7278, chat with a pro on our website, and watch thousands of free video tutorials on <\/span><a href=\"https:\/\/www.youtube.com\/@appliancepartspros\/videos\"><b>our YouTube channel<\/b><\/a><span style=\"font-weight: 400\">.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Make sure to follow us on <\/span><a href=\"http:\/\/facebook.com\/appliancepartspros\"><b>Facebook<\/b><\/a><span style=\"font-weight: 400\">, <\/span><a href=\"https:\/\/twitter.com\/applpartspros\"><b>Twitter<\/b><\/a><span style=\"font-weight: 400\"> and <\/span><a href=\"https:\/\/instagram.com\/appliancepartspros?igshid=OGQ5ZDc2ODk2ZA==\"><b>Instagram<\/b><\/a><span style=\"font-weight: 400\">!\u00a0<\/span><\/p>\n<\/div><\/section>\n<div  class='av-social-sharing-box  avia-builder-el-2  el_after_av_textblock  avia-builder-el-last  '><div 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