{"id":18950,"date":"2025-06-17T06:27:35","date_gmt":"2025-06-17T13:27:35","guid":{"rendered":"https:\/\/www.appliancepartspros.com\/b\/?p=18950"},"modified":"2026-07-14T12:39:20","modified_gmt":"2026-07-14T19:39:20","slug":"how-to-test-and-replace-an-lg-washer-heater-with-thermistor","status":"publish","type":"post","link":"https:\/\/www.appliancepartspros.com\/b\/how-to-test-and-replace-an-lg-washer-heater-with-thermistor\/","title":{"rendered":"How to Test and Replace an LG Washer Heater with Thermistor"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p>Fix heating problems in your LG washer by replacing the faulty heater assembly and thermistor\u2014follow this easy step-by-step repair guide.<\/p>\n","protected":false},"author":3,"featured_media":19277,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"LG washer heater assembly with thermistor","_yoast_wpseo_title":"%%title%% %%page%%","_yoast_wpseo_metadesc":"Fix heating problems in your LG washer by replacing the faulty heater assembly and thermistor\u2014follow this easy step-by-step repair guide.","_aviaLayoutBuilderCleanData":"[av_image src='https:\/\/www.appliancepartspros.com\/b\/wp-content\/uploads\/2025\/06\/20250605_1526_Colonial-Laundry-Room-Elegance_simple_compose_01jx0rsqejfevr2qv3vwdna1hn-1500x630.png' attachment='19277' attachment_size='featured_large' copyright='' caption='' styling='' align='center' font_size='' overlay_opacity='0.4' overlay_color='#000000' overlay_text_color='#ffffff' animation='no-animation' hover='' appearance='' link='' target='' title_attr='' alt_attr='' lazy_loading='disabled' id='' custom_class='' av_element_hidden_in_editor='0' av_uid='av-z6debq' admin_preview_bg=''][\/av_image]\r\n\r\n[av_textblock size='' av-medium-font-size='' av-small-font-size='' av-mini-font-size='' font_color='' color='' id='' custom_class='' av_uid='av-mbpctf0v' admin_preview_bg='']\r\n<span style=\"font-weight: 400;\">Is your LG washer not heating properly or leaving clothes damp after a cycle? If so, the heater assembly and thermistor might be to blame. These parts regulate <\/span><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-decide-what-water-temperature-to-use-for-laundry\/\"><span style=\"font-weight: 400;\">water temperature<\/span><\/a><span style=\"font-weight: 400;\">, and when they fail, your washer can struggle to clean effectively. We\u2019ll walk you through how to test and replace these components, saving you time and money before calling in the pros!<\/span>\r\n\r\n<span style=\"font-weight: 400;\">If you need any replacement parts for your <\/span><a href=\"https:\/\/www.appliancepartspros.com\/parts-for-lg-wm8000hva.html\"><b>LG washer<\/b><\/a><span style=\"font-weight: 400;\">, 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>\n\nWe recommend consulting your manufacturer's documentation or<\/span><a href=\"https:\/\/www.appliancepartspros.com\/repair-help\/\"> <b>contact us<\/b><\/a><span style=\"font-weight: 400;\"> with any questions.<\/span><\/em>\r\n\r\n[lwptoc numeration=\"none\"]\r\n<p style=\"font-size:14.5px;margin:14px 0;font-family:system-ui,-apple-system,sans-serif\"><a href=\"#app-safety-notes\">Full safety notes below<\/a><\/p>\n\n<h2><span style=\"font-weight: 400;\">What you need<\/span><\/h2>\r\n<ul>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Towel<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pair of adjustable pliers<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Flashlight<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Multimeter<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">10 mm socket wrench<\/span><\/li>\r\n<\/ul>\r\n<h2><span style=\"font-weight: 400;\">Safety tips<\/span><\/h2>\r\n<span style=\"font-weight: 400;\">When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:<\/span>\r\n<ul>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Always power off and unplug your appliance or switch off the circuit breaker before you attempt any maintenance or replacement work. This keeps you safe by eliminating any risk of electric shock.\u00a0<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If the appliance has recently been used, give it plenty of time to cool down before working on it.\u00a0<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Take your time while working to prevent accidents and personal injuries. Rushing is the enemy of precision.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Work in a well-lit area so you can see and access appliance parts.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Never work on internal parts with wet hands. Make sure the work area is completely dry.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part.\u00a0<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Wear insulated work gloves to protect your hands from sharp metal parts and debris.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><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>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Always take photos or make a note of wiring terminals or other connections before disconnecting them to make reassembly easier.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Don\u2019t test live voltage with a multimeter if you\u2019re unfamiliar with how to prevent short-circuiting.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Consider wearing safety glasses and\/or a dust mask when working with chemicals, dust or a large amount of debris to prevent irritation or injury.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn off the water supply at the outlet before beginning repairs. Keep towels ready to catch any residual water in the system when removing parts.<\/span><\/li>\r\n<\/ul>\r\n<h2><span style=\"font-weight: 400;\">How to test and replace the LG washer\u2019s heater assembly and thermistor<\/span><\/h2>\r\n<span style=\"font-weight: 400;\">Follow these steps to safely test, remove, and replace the heater assembly and thermistor in your LG washer.<\/span>\r\n<h3><span style=\"font-weight: 400;\">Step 1. Test the heater assembly and thermistor<\/span><\/h3>\r\n<b><i>NOTE: <\/i><\/b><i><span style=\"font-weight: 400;\">Generally, for every 1 degree in temperature difference, 2 Ohms could be added or subtracted. If the temperature in your home is cooler, resistance would be subtracted.<\/span><\/i>\r\n<ol>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn off the power by unplugging the washer.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn off the water supply to the washer.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Place a towel under the washer to catch any water drips.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use pliers to loosen and remove the water inlet hoses from the back of the washer.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Tilt the washer onto its left side when facing the front.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Place a solid support under the washer to keep it stable.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Locate the heater assembly at the bottom front of the outer tub.<\/span><\/li>\r\n<\/ol>\r\n<ol>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Set the multimeter to resistance mode (\u03a9 - horseshoe symbol).<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use a flashlight for better visibility if needed.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disconnect the white plug from the thermistor.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Place the multimeter probes on the thermistor terminals.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Check for a resistance reading of about 39.5 K\u03a9 at room temperature (77\u00b0F).<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If the reading is significantly different, replace the thermistor.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Remove both wire connectors from the heater terminals.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Place the multimeter probes on the heater terminals.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Check for a resistance reading between 12 - 18 \u03a9.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If the reading is 0 \u03a9 (short circuit) or infinite (open circuit), the heater is faulty.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Switch the multimeter to continuity mode (Wi-Fi-like symbol).<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Place one probe on a heater terminal and the other on the nut in the middle of the heater.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">If continuity is detected (beeping sound), the heater is grounded and must be replaced.<\/span><\/li>\r\n<\/ol>\r\n<h3><span style=\"font-weight: 400;\">Step 2. Remove the heater assembly and thermistor<\/span><\/h3>\r\n<ol>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Unplug the washer and confirm it is stable on its left side.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Remove the thermistor plug from the assembly.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Disconnect both wire connectors from the heater terminals.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use a 10mm socket wrench to remove the central nut on the heater bracket.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Slide off the ground wire loop from the post.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use the 10mm socket wrench to loosen the second nut without fully removing it.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hold a towel under the heater assembly to catch any residual water.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pull out the heater assembly from the opening.<\/span><\/li>\r\n<\/ol>\r\n<h3><span style=\"font-weight: 400;\">Step 3. Install the new heater assembly and thermistor<\/span><\/h3>\r\n<ol>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Clean the surface around the heater assembly opening.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Insert the new heater assembly with the terminals facing downward.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Push the heater assembly into place.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use the 10mm socket wrench to tighten the central nut.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Slide the ground wire loop onto the post.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Install and tighten the second nut with the 10mm socket wrench.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reconnect the two wire connectors to the heater terminals.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reconnect the thermistor plug.<\/span><\/li>\r\n<\/ol>\r\n<h3><span style=\"font-weight: 400;\">Step 4. Reset and test the washer<\/span><\/h3>\r\n<ol>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Return the washer to an upright position.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reconnect the water inlet hoses by threading them manually onto the inlets.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use pliers to tighten the water inlet hoses securely.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Turn on the water supply.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Plug the washer back into the power outlet.<\/span><\/li>\r\n \t<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Run a test cycle to check for leaks and proper heating operation.<\/span><\/li>\r\n<\/ol>\r\n<h2><span style=\"font-weight: 400;\">We\u2019re here to help<\/span><\/h2>\r\n<span style=\"font-weight: 400;\">Thanks for following along! We hope this guide made testing and replacing the <\/span><span style=\"font-weight: 400;\">heater assembly and thermistor <\/span><span style=\"font-weight: 400;\">in your <\/span><span style=\"font-weight: 400;\">LG washer <\/span><span style=\"font-weight: 400;\">a <\/span><span style=\"font-weight: 400;\">breeze. If you still need parts, bring your model number on over to <\/span><a href=\"http:\/\/appliancepartspros.com\"><b>AppliancePartsPros.com<\/b><\/a><span style=\"font-weight: 400;\">, where you\u2019ll find millions of parts in stock and fast shipping\u2014most arrive in only two days! If you have questions, you can reach us at 1 (877) 477-7278 or chat with us online. Make sure to swing by <\/span><a href=\"https:\/\/www.appliancepartspros.com\/b\/\"><b>our DIY blog<\/b><\/a> <span style=\"font-weight: 400;\">and <\/span><a href=\"https:\/\/www.youtube.com\/@appliancepartspros\/videos\"><b>YouTube channel<\/b><\/a><span style=\"font-weight: 400;\"> for more repair tips. And don\u2019t miss out\u2014follow 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>X<\/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;\"> to see our latest and greatest!<\/span>\n\n<em><span style=\"font-weight: 400;\">The information in this article may not apply to your specific appliance model.\n\n<div id=\"app-safety-notes\" style=\"border:1px solid #E6E6E6;border-radius:8px;overflow:hidden;margin:22px 0;font-family:system-ui,-apple-system,sans-serif\"><div style=\"background:#1C437C;color:#fff;padding:9px 16px;font-weight:700;font-size:15px\">\u26a1&nbsp;Electrical safety \u2014 before you start<\/div><ul style=\"margin:0;padding:14px 20px 14px 38px;font-size:15px;line-height:1.6;color:#1A1A1A;background:#fff\"><li style=\"margin:6px 0\"><b>Disconnect power<\/b> before you start \u2014 unplug it or switch off the breaker, and <b>confirm it's dead<\/b>.<\/li><li style=\"margin:6px 0\">Follow your <b>local electrical code<\/b>.<\/li><li style=\"margin:6px 0\">Anything involving <b>household wiring, outlets, or the breaker panel<\/b> itself is <b>licensed-electrician territory<\/b>.<\/li><\/ul><\/div>\n[\/av_textblock]\r\n\r\n[av_blog blog_type='posts' categories='9' link='category' blog_style='blog-grid' content_length='content' contents='title_read_more' date_filter='' date_filter_start='' date_filter_end='' date_filter_format='yy\/mm\/dd' offset='0' conditional='' bloglist_width='' columns='3' preview_mode='auto' image_size='portfolio' items='3' paginate='yes' lazy_loading='disabled' alb_description='' id='' custom_class='' av_uid='av-mbuwbfz9']\r\n\r\n[av_social_share title='Share this entry' buttons='' share_facebook='' 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