{"id":15371,"date":"2025-04-02T07:49:50","date_gmt":"2025-04-02T14:49:50","guid":{"rendered":"https:\/\/www.appliancepartspros.com\/b\/?p=15371"},"modified":"2025-04-02T07:49:59","modified_gmt":"2025-04-02T14:49:59","slug":"how-to-fix-a-central-air-conditioner-that-wont-start","status":"publish","type":"post","link":"https:\/\/www.appliancepartspros.com\/c\/how-to-fix-a-central-air-conditioner-that-wont-start\/","title":{"rendered":"How to fix a central air conditioner that won\u2019t start"},"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-15452 avia-img-lazy-loading-not-15452 avia_image' src=\"https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1.jpg\" alt='' title='' height=\"500\" width=\"1600\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1.jpg 1600w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-300x94.jpg 300w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-1030x322.jpg 1030w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-768x240.jpg 768w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-1536x480.jpg 1536w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-1500x469.jpg 1500w, https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2025\/04\/Updated-blog-rectangle-4-1-705x220.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\">As summer temperatures soar, a malfunctioning air conditioner can quickly turn a comfortable home into an unbearable sauna. However, with a bit of troubleshooting, you may be able to identify and resolve the issue yourself, potentially saving you the cost of a professional service call. By the end of this guide, you&#8217;ll have a better understanding of your air conditioning system and the confidence to handle basic troubleshooting and minor repairs.<\/span><\/p>\n<p><span style=\"font-weight: 400\">If you find out that you need any replacement parts for your appliance<\/span> <span style=\"font-weight: 400\">while you\u2019re troubleshooting, 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><em><span style=\"font-weight: 400\">The troubleshooting information provided in this article 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><\/em><\/p>\n\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\">Tools and materials needed<\/span><\/h2>\n<ul>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Voltage tester\u00a0<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Multimeter<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Screwdrivers\u00a0<\/span><\/li>\n<\/ul>\n<p><em><span style=\"font-weight: 400\">The specific tools required may vary depending on the model of your appliance and the type of fasteners used on it. Always consult the user manual or refer to any specific instructions provided by the manufacturer for the recommended tools for your appliance model.<\/span><\/em><\/p>\n<h2><span style=\"font-weight: 400\">Troubleshooting steps<\/span><\/h2>\n<h3><span style=\"font-weight: 400\">Check the power:<\/span><\/h3>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Ensure the power outlet that the air conditioner is plugged into is functioning properly.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Use a voltage tester or lamp to check if there is power at the outlet.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If there is no power, check the circuit breaker or fuse that supplies power to the outlet and reset or replace it if necessary.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Visually inspect the plug and cord for any damage, such as fraying, cracks, or loose connections.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Unplug the air conditioner and check if the plug is properly inserted into the outlet.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the plug is loose or the cord appears damaged, replace the cord.<\/span><\/li>\n<\/ol>\n<h3><span style=\"font-weight: 400\">Check the switch or thermostat:<\/span><\/h3>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Locate the air conditioner&#8217;s control panel or thermostat and ensure the power switch is in the &#8220;On&#8221; position.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the switch is on, check the thermostat settings to ensure it is calling for cooling.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Try adjusting the thermostat to a lower temperature to see if the air conditioner starts.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If the switch or thermostat appears to be defective, replace it with a new one.<\/span><\/li>\n<\/ol>\n<h3><span style=\"font-weight: 400\">Inspect the wiring at the control panel:<\/span><\/h3>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Carefully remove the access panel or cover to the air conditioner&#8217;s control panel.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Visually inspect the wiring for any signs of damage, such as frayed, broken, or short-circuited wires.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If you find any damaged wiring, carefully replace or repair the affected wires.<\/span><\/li>\n<\/ol>\n<h3><span style=\"font-weight: 400\">Test the capacitor and start-relay switch:<\/span><\/h3>\n<ol>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">The air conditioner&#8217;s compressor is typically started by a capacitor and a start-relay switch.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">If these components are faulty, the compressor may not start.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">You can use a multimeter to test the capacitor and start-relay switch. Replace them if they are found to be defective.<\/span><\/li>\n<\/ol>\n<h2><span style=\"font-weight: 400\">Additional information<\/span><\/h2>\n<p><span style=\"font-weight: 400\">Thank you for reading! We hope this guide helped you get your central air conditioner working again.<\/span><\/p>\n<p><span style=\"font-weight: 400\">If you have any other appliance repair needs or projects, don\u2019t hesitate to explore our other troubleshooting guides and videos.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400\">If you need replacement parts or some extra help with ordering them, grab your model number and head over to <\/span><a href=\"https:\/\/www.appliancepartspros.com\/\"><b>AppliancePartsPros.com<\/b><\/a><span style=\"font-weight: 400\">, where you can chat with a pro, read our DIY blog and more.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Be sure to <\/span><a href=\"https:\/\/www.youtube.com\/@appliancepartspros\/videos\"><b>subscribe to us on YouTube<\/b><\/a><span style=\"font-weight: 400\"> and 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\">!<\/span><\/p>\n<p><span style=\"font-weight: 400\">Keep Reading:<\/span><\/p>\n<p><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-troubleshoot-fix-common-window-air-conditioner-problems\/\"><b>How to troubleshoot &amp; fix common window air conditioner problems<\/b><\/a><\/p>\n<p><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-get-better-air-quality-from-your-window-air-conditioner\/\"><b>How to get better air quality from your window air conditioner<\/b><\/a><b>\u00a0<\/b><\/p>\n<p><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-clean-your-ac-unit-filter\/\"><b>How to Clean Your Air Conditioner the Easy Way<\/b><\/a><b>\u00a0<\/b><\/p>\n<\/div><\/section>\n<div  class='av-social-sharing-box  avia-builder-el-2  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