{"id":16291,"date":"2024-12-19T03:44:11","date_gmt":"2024-12-19T09:44:11","guid":{"rendered":"https:\/\/www.galmicheandsons.com\/hvac-blog\/?p=16291"},"modified":"2025-10-08T03:48:51","modified_gmt":"2025-10-08T08:48:51","slug":"furnace-repair-basics","status":"publish","type":"post","link":"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/","title":{"rendered":"Furnace Repair Basics: A Beginner&#8217;s Guide to Common Issues"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 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\/furnace-repair-basics\/#Common_Furnace_Problems\" >Common Furnace Problems<\/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\/furnace-repair-basics\/#1_Furnace_Wont_Turn_On\" >1. Furnace Won&#8217;t Turn On<\/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\/furnace-repair-basics\/#2_Insufficient_Heat\" >2. Insufficient Heat<\/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\/furnace-repair-basics\/#3_Frequent_Cycling\" >3. Frequent Cycling<\/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\/furnace-repair-basics\/#4_Strange_Noises\" >4. Strange Noises<\/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\/furnace-repair-basics\/#5_Pilot_Light_Issues\" >5. Pilot Light Issues<\/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\/furnace-repair-basics\/#Furnace_Repair_Basics_Troubleshooting_Tips\" >Furnace Repair Basics: Troubleshooting Tips<\/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\/furnace-repair-basics\/#Preventive_Maintenance_Tips_for_Furnace_Repair_Basics\" >Preventive Maintenance Tips for Furnace Repair Basics<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Schedule_Annual_Inspections\" >Schedule Annual Inspections<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Replace_Air_Filters\" >Replace Air Filters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Clean_the_Ductwork\" >Clean the Ductwork<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Test_the_Thermostat\" >Test the Thermostat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Check_for_Gas_Leaks\" >Check for Gas Leaks<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Frequently_Asked_Questions_About_Furnace_Repair_Basics\" >Frequently Asked Questions About Furnace Repair Basics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/#Contact_Galmiche_Sons_for_Expert_Furnace_Repair_Services_in_St_Louis\" >Contact Galmiche &amp; Sons for Expert Furnace Repair Services in St. Louis<\/a><\/li><\/ul><\/nav><\/div>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-1-300x200.jpg\" alt=\"Furnace Repair Basics\" width=\"300\" height=\"200\" class=\"alignleft size-medium wp-image-16355\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-1-300x200.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-1.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p>When the cold months roll in, a properly functioning furnace is essential for keeping your home warm and comfortable. However, furnaces can encounter various issues over time, which may disrupt their performance. This guide to <strong>furnace repair basics<\/strong> will help you understand common furnace problems, basic troubleshooting steps, and how to maintain your furnace for long-term efficiency. If you&#8217;re in the St. Louis area and need professional <a href=\"https:\/\/www.galmicheandsons.com\/furnace-repair-services.html\">furnace repair services<\/a>, Galmiche &amp; Sons is here to assist. Contact our <a href=\"https:\/\/www.galmicheandsons.com\/contact-galmiche.php\">heating and air conditioning<\/a> experts online or by phone today at <span class=\"mobile_tel\"><span class=\"mobile_tel\">314-993-1110<\/span><\/span> to learn more.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Common_Furnace_Problems\"><\/span>Common Furnace Problems<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Understanding the issues your furnace might face is the first step to identifying and addressing them. Here are some of the most <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/common-furnace-problems-and-how-to-fix-them\/\">common furnace problems<\/a>:<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"1_Furnace_Wont_Turn_On\"><\/span>1. Furnace Won&#8217;t Turn On<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>This is a frequent issue, especially at the start of the heating season. Potential causes include:<\/p>\r\n<ul>\r\n<li>A tripped circuit breaker<\/li>\r\n<li>A faulty thermostat<\/li>\r\n<li>Ignition problems<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"2_Insufficient_Heat\"><\/span>2. Insufficient Heat<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>When your furnace runs but doesn&rsquo;t produce enough heat, the problem could stem from:<\/p>\r\n<ul>\r\n<li>Dirty air filters<\/li>\r\n<li>Leaky ductwork<\/li>\r\n<li>A malfunctioning blower motor<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"3_Frequent_Cycling\"><\/span>3. Frequent Cycling<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>If your furnace turns on and off too frequently, it may be due to:<\/p>\r\n<ul>\r\n<li>An incorrectly set thermostat<\/li>\r\n<li>Poor airflow<\/li>\r\n<li>An oversized furnace for your home<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"4_Strange_Noises\"><\/span>4. Strange Noises<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Unusual sounds like banging, rattling, or screeching can indicate:<\/p>\r\n<ul>\r\n<li>Loose components<\/li>\r\n<li>A failing motor<\/li>\r\n<li>Issues with the burner<\/li>\r\n<\/ul>\r\n<h3><span class=\"ez-toc-section\" id=\"5_Pilot_Light_Issues\"><\/span>5. Pilot Light Issues<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>A pilot light that won&#8217;t stay lit or burns yellow instead of blue may indicate:<\/p>\r\n<ul>\r\n<li>A dirty pilot orifice<\/li>\r\n<li>A malfunctioning thermocouple<\/li>\r\n<li>Insufficient gas supply<\/li>\r\n<\/ul>\r\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-2-300x200.jpg\" alt=\"Furnace Repair Basics | Troubleshooting Tips\" width=\"300\" height=\"200\" class=\"alignright size-medium wp-image-16356\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-2-300x200.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/furnace-repair-basics-2.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2><span class=\"ez-toc-section\" id=\"Furnace_Repair_Basics_Troubleshooting_Tips\"><\/span>Furnace Repair Basics: Troubleshooting Tips<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Before calling a professional for any of the above furnace repair problems, try these simple troubleshooting steps:<\/p>\r\n<ul>\r\n<li><strong>Check the Thermostat<\/strong>: Basic thermostat checks are among the key <strong>furnace repair basics<\/strong><strong><\/strong>every homeowner should know. Ensure the thermostat is set to &ldquo;Heat&rdquo; and the temperature setting is higher than the current room temperature. Replace the batteries if necessary.<\/li>\r\n<li><strong>Inspect the Air Filters<\/strong>: Clogged air filters can restrict airflow and reduce efficiency. Replace filters regularly, typically every 1-3 months. Regular filter changes are a fundamental part of <strong>furnace repair basics<\/strong> and preventive care.<\/li>\r\n<li><strong>Reset the Circuit Breaker<\/strong>: If the furnace isn&rsquo;t powering on, check your electrical panel for a tripped breaker and reset it if needed.<\/li>\r\n<li><strong>Verify the Pilot Light<\/strong>: If your furnace has a pilot light, ensure it is lit. For electronic ignition systems, consult the manual for resetting instructions.<\/li>\r\n<li><strong>Clean Around the Furnace<\/strong>: Dust and debris can interfere with performance. Keep the area around your furnace clean and free of obstructions.<\/li>\r\n<\/ul>\r\n<h2><span class=\"ez-toc-section\" id=\"Preventive_Maintenance_Tips_for_Furnace_Repair_Basics\"><\/span>Preventive Maintenance Tips for Furnace Repair Basics<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Regular maintenance is key to avoiding costly repairs and ensuring your furnace runs efficiently. Here are some furnace repair and maintenance basics every homeowner should follow:<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Schedule_Annual_Inspections\"><\/span>Schedule Annual Inspections<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Professional inspections can catch small issues before they become major problems. Schedule a tune-up before the heating season starts.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Replace_Air_Filters\"><\/span>Replace Air Filters<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Clean filters improve airflow and efficiency. Mark your calendar to replace them regularly.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Clean_the_Ductwork\"><\/span>Clean the Ductwork<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Dust and debris in the ductwork can reduce efficiency and air quality. Have ducts professionally cleaned every few years.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Test_the_Thermostat\"><\/span>Test the Thermostat<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Ensure your thermostat is working properly. Consider upgrading to a programmable thermostat for better temperature control and energy savings.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Check_for_Gas_Leaks\"><\/span>Check for Gas Leaks<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>For gas furnaces, inspect the connections for leaks. If you smell gas, turn off the furnace, evacuate your home, and contact a professional immediately.<\/p>\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_About_Furnace_Repair_Basics\"><\/span>Frequently Asked Questions About Furnace Repair Basics<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-68e62573481ed\"><strong class=\"schema-faq-question\">Why is my furnace blowing cold air?<\/strong> <p class=\"schema-faq-answer\">Cold air could result from a dirty filter, a pilot light issue, or a problem with the thermostat.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e6257348215\"><strong class=\"schema-faq-question\">How often should I replace my furnace filter?<\/strong> <p class=\"schema-faq-answer\">It\u2019s recommended to replace filters every 1-3 months, depending on usage and the type of filter.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e625734823f\"><strong class=\"schema-faq-question\">Can I repair my furnace myself?<\/strong> <p class=\"schema-faq-answer\">While basic troubleshooting is fine, most furnace repairs require professional expertise to ensure safety and proper function so <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/tips-for-hiring-a-furnace-repair-technician\/\">hiring a furnace repair technician<\/a> is recommended. <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/can-you-diy-furnace-repair\/\">DIY furnace repair<\/a> can often lead to bigger problems and dangerous safety issues.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e6257348252\"><strong class=\"schema-faq-question\">What\u2019s the average lifespan of a furnace?<\/strong> <p class=\"schema-faq-answer\">Most furnaces last 15-20 years with regular maintenance. Older units may need replacement for better efficiency and reliability.<\/p><\/div> <\/div>\n\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Contact_Galmiche_Sons_for_Expert_Furnace_Repair_Services_in_St_Louis\"><\/span>Contact Galmiche &amp; Sons for Expert Furnace Repair Services in St. Louis<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Dealing with furnace issues can be challenging, but you don&rsquo;t have to go it alone. At Galmiche &amp; Sons, we&rsquo;ve provided top-quality <a href=\"https:\/\/www.galmicheandsons.com\/residential-heating-cooling.html\">heating and cooling services<\/a> to St. Louis homes and businesses for over 70 years. Whether you need furnace repairs, maintenance, or a new installation, our team is here to help.<\/p>\r\n<p>Contact us today to schedule your furnace repair service or learn more about our offerings. Let us keep your home warm and cozy all winter long!<\/p>","protected":false},"excerpt":{"rendered":"<p>When the cold months roll in, a properly functioning furnace is essential for keeping your home warm and comfortable. However, furnaces can encounter various issues over time, which may disrupt their performance. This guide to furnace repair basics will help you understand common furnace problems, basic troubleshooting steps, and how to maintain your furnace for long-term efficiency. If you&#8217;re in the St. Louis area and need professional furnace repair services, Galmiche &amp; Sons is here to assist. Contact our heating &hellip; <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/furnace-repair-basics\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Furnace Repair Basics: A Beginner&#8217;s Guide to Common Issues<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":16355,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[12,29,27,37,11,3],"tags":[],"class_list":["post-16291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-furnace-maintenance","category-furnace-repair","category-furnace-tips","category-furnace-troubleshooting","category-furnaces","category-hvac-maintenance"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Furnace Repair Basics | St. Louis HVAC Tips<\/title>\n<meta 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