{"id":17054,"date":"2025-03-31T06:28:18","date_gmt":"2025-03-31T11:28:18","guid":{"rendered":"https:\/\/www.galmicheandsons.com\/hvac-blog\/?p=17054"},"modified":"2025-10-08T03:48:34","modified_gmt":"2025-10-08T08:48:34","slug":"ac-repair-after-power-outage","status":"publish","type":"post","link":"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/","title":{"rendered":"AC Repair After Power Outage: What to Do If Your AC Won&rsquo;t Turn Back On"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#Common_Reasons_Your_AC_Wont_Turn_On_After_a_Power_Outage\" >Common Reasons Your AC Won&rsquo;t Turn On After a Power Outage<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#1_Tripped_Circuit_Breaker\" >1. Tripped Circuit Breaker<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#2_Blown_Fuse\" >2. Blown Fuse<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#3_Thermostat_Malfunction\" >3. Thermostat Malfunction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#4_AC_Contactor_or_Capacitor_Damage\" >4. AC Contactor or Capacitor Damage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#5_Safety_Lockout_Mode\" >5. Safety Lockout Mode<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#Preventing_AC_Issues_After_a_Power_Outage\" >Preventing AC Issues After a Power Outage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#FAQs_About_AC_Repair_After_a_Power_Outage\" >FAQs About AC Repair After a Power Outage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/#Contact_Galmiche_Sons_for_AC_Repair_in_St_Louis\" >Contact Galmiche &amp; Sons for AC Repair in St. Louis<\/a><\/li><\/ul><\/nav><\/div>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-1-300x204.jpg\" alt=\"AC Repair After Power Outage\" width=\"300\" height=\"204\" class=\"alignright size-medium wp-image-17202\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-1-300x204.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-1.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p>A power outage can be frustrating, especially in the middle of a hot St. Louis summer. When the power finally returns, you expect your air conditioner to turn back on and resume cooling your home. However, many homeowners find that their AC won&rsquo;t start after a power outage. In this guide to AC repair after a power outage, we will explore common reasons why your AC may not be working and what steps you can take to resolve the issue.<\/p>\r\n<p>To learn more or schedule <a href=\"https:\/\/www.galmicheandsons.com\/air-conditioner-repair.html\">air conditioner repair<\/a> service in St. Louis, contact our team today.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Common_Reasons_Your_AC_Wont_Turn_On_After_a_Power_Outage\"><\/span>Common Reasons Your AC Won&rsquo;t Turn On After a Power Outage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>After a power outage, several electrical and mechanical issues may prevent your air conditioner from restarting. Here are the most common reasons you need AC repair after power outages:<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"1_Tripped_Circuit_Breaker\"><\/span>1. Tripped Circuit Breaker<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>During a power outage, power surges can overload your electrical system and trip the circuit breaker, cutting power to your AC unit.<\/p>\r\n<p><strong>Solution:<\/strong><\/p>\r\n<ul>\r\n<li>Locate your home&rsquo;s electrical panel and check the breaker labeled for your air conditioner.<\/li>\r\n<li>If the breaker is in the &quot;off&quot; position, flip it back to &quot;on.&quot;<\/li>\r\n<li>If it trips again immediately, do not attempt to reset it repeatedly. This could indicate a more serious electrical issue requiring professional assistance.<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"2_Blown_Fuse\"><\/span>2. Blown Fuse<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Your AC system may have fuses in the disconnect box outside near the condenser unit. A blown fuse can prevent your system from receiving power.<\/p>\r\n<p><strong>Solution:<\/strong><\/p>\r\n<ul>\r\n<li>Inspect the fuses to see if they are blown.<\/li>\r\n<li>Replace them if needed, or call an HVAC professional for assistance.<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"3_Thermostat_Malfunction\"><\/span>3. Thermostat Malfunction<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Sometimes, a power outage can cause thermostat settings to reset or even damage the thermostat itself.<\/p>\r\n<p><strong>Solution:<\/strong><\/p>\r\n<ul>\r\n<li>Check your <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/optimal-thermostat-settings-for-summer\/\">thermostat settings<\/a> to ensure it is powered on and set to &quot;cool.&quot;<\/li>\r\n<li>If it runs on batteries, replace them.<\/li>\r\n<li>Reset the thermostat by turning it off, waiting a few minutes, and turning it back on.<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"4_AC_Contactor_or_Capacitor_Damage\"><\/span>4. AC Contactor or Capacitor Damage<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>A power surge from an outage can damage internal electrical components like the contactor or capacitor, which are essential for starting the compressor and fan.<\/p>\r\n<p><strong>Solution:<\/strong><\/p>\r\n<ul>\r\n<li>If you hear clicking noises or the AC attempts to start but fails, this could indicate capacitor or contactor damage.<\/li>\r\n<li>Contact an HVAC professional to inspect and replace the damaged components.<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"5_Safety_Lockout_Mode\"><\/span>5. Safety Lockout Mode<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Many modern AC systems have a built-in safety lockout feature that prevents them from restarting immediately after a power outage.<\/p>\r\n<p><strong>Solution:<\/strong><\/p>\r\n<ul>\r\n<li>Turn off your thermostat and AC at the breaker panel.<\/li>\r\n<li>Wait about 30 minutes to allow the internal safety mechanism to reset.<\/li>\r\n<li>Turn everything back on and check if the AC starts running.<\/li>\r\n<\/ul>\r\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-2-300x204.jpg\" alt=\"Preventing AC Issues After a Power Outage\" width=\"300\" height=\"204\" class=\"alignright size-medium wp-image-17203\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-2-300x204.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/ac-repair-after-power-outage-2.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2><span class=\"ez-toc-section\" id=\"Preventing_AC_Issues_After_a_Power_Outage\"><\/span>Preventing AC Issues After a Power Outage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>While power outages are sometimes unavoidable, you can take a few precautions to protect your AC system:<\/p>\r\n<ul>\r\n<li><strong>Install a Surge Protector:<\/strong> A surge protector can safeguard your HVAC system from damage caused by power surges.<\/li>\r\n<li><strong>Regular Maintenance:<\/strong> Keeping your AC system well-maintained reduces the risk of component failures.<\/li>\r\n<li><strong>Use a Smart Thermostat:<\/strong> Some smart thermostats have built-in features to handle power interruptions and restart your system automatically.<\/li>\r\n<\/ul>\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"FAQs_About_AC_Repair_After_a_Power_Outage\"><\/span>FAQs About AC Repair After a Power Outage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-68e62562bcdf3\"><strong class=\"schema-faq-question\">How long should I wait before turning my AC back on after a power outage?<\/strong> <p class=\"schema-faq-answer\">If your AC doesn\u2019t turn on immediately, wait 30 minutes before attempting a restart. This allows any safety lockout mechanisms to reset.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e62562bce1c\"><strong class=\"schema-faq-question\">Why does my circuit breaker keep tripping when I turn on my AC?<\/strong> <p class=\"schema-faq-answer\">If your breaker trips repeatedly, there may be an electrical short or overload. This could indicate a damaged capacitor, faulty wiring, or other issues requiring professional repair.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e62562bce30\"><strong class=\"schema-faq-question\">Can a power outage permanently damage my AC unit?<\/strong> <p class=\"schema-faq-answer\">Yes, power surges can damage internal AC components like the capacitor, compressor, or thermostat. Using a surge protector can help minimize this risk.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e62562bce42\"><strong class=\"schema-faq-question\">When should I call a professional for AC repair after a power outage?<\/strong> <p class=\"schema-faq-answer\">If you&#8217;ve tried resetting your thermostat and checking your breakers but your AC still won&#8217;t start, it&#8217;s best to call an HVAC professional for a thorough inspection and repair.<\/p><\/div> <\/div>\n\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Contact_Galmiche_Sons_for_AC_Repair_in_St_Louis\"><\/span>Contact Galmiche &amp; Sons for AC Repair in St. Louis<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>If your AC won&rsquo;t turn back on after a power outage, don&rsquo;t sweat it! Galmiche &amp; Sons has been providing expert AC repair services in St. Louis for decades. Our team can diagnose and fix any issues to restore your cooling system quickly and efficiently. Contact us today to <a href=\"https:\/\/www.galmicheandsons.com\/service-request.php\">schedule your HVAC maintenance<\/a> or AC repair service and keep your home comfortable!<\/p>","protected":false},"excerpt":{"rendered":"<p>A power outage can be frustrating, especially in the middle of a hot St. Louis summer. When the power finally returns, you expect your air conditioner to turn back on and resume cooling your home. However, many homeowners find that their AC won&rsquo;t start after a power outage. In this guide to AC repair after a power outage, we will explore common reasons why your AC may not be working and what steps you can take to resolve the issue. &hellip; <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/ac-repair-after-power-outage\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">AC Repair After Power Outage: What to Do If Your AC Won&rsquo;t Turn Back On<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":17202,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[15,13,5,38,2],"tags":[],"class_list":["post-17054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-conditioner-repair","category-air-conditioner-tips","category-air-conditioners","category-heating-cooling-faqs","category-hvac-tips"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AC Repair After Power Outage | St. Louis HVAC Tips<\/title>\n<meta name=\"description\" content=\"Is your AC not turning back on after a power outage? 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