{"id":19084,"date":"2026-01-09T09:23:45","date_gmt":"2026-01-09T15:23:45","guid":{"rendered":"https:\/\/www.galmicheandsons.com\/hvac-blog\/?p=19084"},"modified":"2026-01-09T09:23:49","modified_gmt":"2026-01-09T15:23:49","slug":"heat-pump-not-working-in-cold-weather","status":"publish","type":"post","link":"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/","title":{"rendered":"Heat Pump Not Working in Cold Weather? Here&#8217;s What You Need to Know"},"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\/heat-pump-not-working-in-cold-weather\/#Why_Heat_Pumps_Struggle_in_Cold_Weather\" >Why Heat Pumps Struggle in Cold Weather<\/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\/heat-pump-not-working-in-cold-weather\/#Common_Cold_Weather_Challenges_for_Heat_Pumps\" >Common Cold Weather Challenges for Heat Pumps<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#When_Supplemental_Heat_Is_Necessary\" >When Supplemental Heat Is Necessary<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#Common_Homeowner_Pain_Points_We_See\" >Common Homeowner Pain Points We See<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#Rising_Energy_Bills_with_Less_Comfort\" >Rising Energy Bills with Less Comfort<\/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\/heat-pump-not-working-in-cold-weather\/#Uneven_Heating_or_Cold_Rooms\" >Uneven Heating or Cold Rooms<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#Confusion_About_Defrost_Cycles\" >Confusion About Defrost Cycles<\/a><\/li><\/ul><\/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\/heat-pump-not-working-in-cold-weather\/#How_Galmiche_Sons_Solves_Cold_Weather_Heat_Pump_Issues\" >How Galmiche &#038; Sons Solves Cold Weather Heat Pump Issues<\/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\/heat-pump-not-working-in-cold-weather\/#Heat_Pump_vs_Furnace_Performance_in_St_Louis_Winters\" >Heat Pump vs. Furnace Performance in St. Louis Winters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/#Heat_Pump_Not_Working_Schedule_Trusted_Heating_Service_in_St_Louis\" >Heat Pump Not Working? Schedule Trusted Heating Service in St. Louis<\/a><\/li><\/ul><\/nav><\/div>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-1-300x200.jpg\" alt=\"Heat Pump Not Working in Cold Weather? Here's What You Need to Know\" width=\"300\" height=\"200\" class=\"alignright size-medium wp-image-19117\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-1-300x200.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-1.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p>If you are relying on a heat pump to keep your home warm, winter performance issues can be frustrating and concerning. Many St. Louis homeowners search for answers when their system struggles during freezing temperatures. If your heat pump not working in cold weather is becoming a recurring issue, understanding why this happens and when to seek professional help can save you stress, money, and discomfort.<\/p>\r\n<p>At Galmiche &#038; Sons, we have helped thousands of local homeowners diagnose and resolve winter heating problems. Our experience across decades of Midwest winters gives us a clear understanding of what is normal heat pump behavior and what signals a real problem.<\/p>\r\n<p>To learn more or <a href=\"https:\/\/www.galmicheandsons.com\/service-request.php\">schedule heat pump services<\/a> in St. Louis, contact our team today online or by phone.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Why_Heat_Pumps_Struggle_in_Cold_Weather\"><\/span>Why Heat Pumps Struggle in Cold Weather<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Heat pumps work differently than gas furnaces. Instead of generating heat, they move heat from outside air into your home. During mild winter days, this process is efficient and cost effective. However, when outdoor temperatures drop below freezing, there is less available heat energy to extract.<\/p>\r\n<p>This is one of the most common reasons homeowners believe their heat pump is not working in cold weather, even though it may still be operating as designed.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Common_Cold_Weather_Challenges_for_Heat_Pumps\"><\/span>Common Cold Weather Challenges for Heat Pumps<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul>\r\n<li>Reduced heating capacity as outdoor temperatures fall<\/li>\r\n<li>Longer run times that make the system seem inefficient<\/li>\r\n<li>Cooler air coming from vents compared to furnace heat<\/li>\r\n<li>Ice buildup on the outdoor unit during extreme conditions<\/li>\r\n<\/ul>\r\n<p>In St. Louis winters, these factors can combine to make homes feel chilly, especially during extended cold snaps.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"When_Supplemental_Heat_Is_Necessary\"><\/span>When Supplemental Heat Is Necessary<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Most heat pump systems installed in the St. Louis area are equipped with auxiliary or emergency heat. This supplemental heat source is typically electric resistance heat or a gas furnace in dual fuel systems.<\/p>\r\n<p>When outdoor temperatures drop too low, the system automatically engages supplemental heat to maintain indoor comfort. If this backup heat does not activate properly, homeowners may experience significant temperature drops.<\/p>\r\n<p>If you suspect your heat pump not working in cold weather is related to auxiliary heat failure, professional inspection is strongly recommended.<\/p>\r\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-2-300x225.jpg\" alt=\"Heat Pump Not Working in Cold Weather?\" width=\"300\" height=\"225\" class=\"alignright size-medium wp-image-19118\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-2-300x225.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-2.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2><span class=\"ez-toc-section\" id=\"Common_Homeowner_Pain_Points_We_See\"><\/span>Common Homeowner Pain Points We See<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Many customers contact Galmiche &#038; Sons after experiencing one or more of these problems:<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Rising_Energy_Bills_with_Less_Comfort\"><\/span>Rising Energy Bills with Less Comfort<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>A struggling heat pump may run constantly without adequately heating your home. This leads to higher utility bills with little improvement in comfort.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Uneven_Heating_or_Cold_Rooms\"><\/span>Uneven Heating or Cold Rooms<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Heat pumps already deliver air at a lower temperature than furnaces. When combined with duct issues or system strain, some rooms may feel noticeably colder than others.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"Confusion_About_Defrost_Cycles\"><\/span>Confusion About Defrost Cycles<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>During cold weather, heat pumps periodically enter defrost mode to clear ice from the outdoor coil. Homeowners often mistake this for system failure when cold air briefly blows inside.<\/p>\r\n<p>Our technicians take time to explain normal operation versus actual problems so you feel confident in your system.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"How_Galmiche_Sons_Solves_Cold_Weather_Heat_Pump_Issues\"><\/span>How Galmiche &#038; Sons Solves Cold Weather Heat Pump Issues<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Our approach focuses on accuracy, safety, and long term reliability. We start with a full system evaluation that includes:<\/p>\r\n<ul>\r\n<li>Checking refrigerant levels and airflow<\/li>\r\n<li>Testing auxiliary heat operation<\/li>\r\n<li>Inspecting outdoor units for ice damage or sensor failure<\/li>\r\n<li>Evaluating thermostat settings and wiring<\/li>\r\n<\/ul>\r\n<p>If repairs are needed, we provide clear recommendations and honest pricing. When a heat pump is no longer suitable for St. Louis winters, we also discuss upgrade or dual fuel options that improve comfort without unnecessary expense.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Heat_Pump_vs_Furnace_Performance_in_St_Louis_Winters\"><\/span>Heat Pump vs. Furnace Performance in St. Louis Winters<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Many homeowners eventually ask whether a heat pump is the right choice for their home. In our climate, hybrid systems often provide the best balance of efficiency and reliability. A heat pump handles mild temperatures efficiently, while a gas furnace delivers dependable heat during extreme cold.<\/p>\r\n<p>If you are experiencing repeated issues with your heat pump not working in cold weather, this conversation may be worth having.<\/p>\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1767963612197\"><strong class=\"schema-faq-question\">Is it normal for my heat pump to blow cool air in winter?<\/strong> <p class=\"schema-faq-answer\">Yes. Heat pumps produce air that feels cooler than furnace heat, especially during cold outdoor conditions. As long as indoor temperatures are rising, this can be normal.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767963750402\"><strong class=\"schema-faq-question\">At what temperature does a heat pump stop working efficiently?<\/strong> <p class=\"schema-faq-answer\">Most standard heat pumps lose efficiency below freezing. Performance drops significantly around 25 to 30 degrees, depending on system design.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767963759523\"><strong class=\"schema-faq-question\">Why is my outdoor heat pump unit covered in ice?<\/strong> <p class=\"schema-faq-answer\">Some frost is normal, but thick ice buildup is not. This may indicate defrost system problems that require professional service.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767963773385\"><strong class=\"schema-faq-question\">Should I switch to emergency heat manually?<\/strong> <p class=\"schema-faq-answer\">Only if advised by a professional. Emergency heat is expensive to run and should be used strategically.<\/p> <\/div> <\/div>\r\n\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Heat_Pump_Not_Working_Schedule_Trusted_Heating_Service_in_St_Louis\"><\/span>Heat Pump Not Working? Schedule Trusted Heating Service in St. Louis<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>If your heat pump not working in cold weather is leaving your home uncomfortable, Galmiche &#038; Sons is here to help. Our experienced technicians understand St. Louis winters and know how to keep your heating system running safely and efficiently.<\/p>\r\n<p>Contact Galmiche &#038; Sons today to schedule heating service or discuss whether your system is properly equipped for winter conditions. Your comfort and peace of mind are always our priority.<\/p>","protected":false},"excerpt":{"rendered":"<p>If you are relying on a heat pump to keep your home warm, winter performance issues can be frustrating and concerning. Many St. Louis homeowners search for answers when their system struggles during freezing temperatures. If your heat pump not working in cold weather is becoming a recurring issue, understanding why this happens and when to seek professional help can save you stress, money, and discomfort. At Galmiche &#038; Sons, we have helped thousands of local homeowners diagnose and resolve &hellip; <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Heat Pump Not Working in Cold Weather? Here&#8217;s What You Need to Know<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":19117,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[58,31,59,30,38],"tags":[],"class_list":["post-19084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heat-pump-maintenance","category-heat-pump-repair","category-heat-pump-tips","category-heat-pump-troubleshooting","category-heating-cooling-faqs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Heat Pump Not Working in Cold Weather? Here&#039;s What You Need to Know | St. Louis HVAC Tips<\/title>\n<meta name=\"description\" content=\"Is your heat pump struggling in cold weather? Discover common issues why your heat pump is not working in cold weather and expert solutions to keep your home warm this winter.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Heat Pump Not Working in Cold Weather? Here&#039;s What You Need to Know | St. Louis HVAC Tips\" \/>\n<meta property=\"og:description\" content=\"Is your heat pump struggling in cold weather? Discover common issues why your heat pump is not working in cold weather and expert solutions to keep your home warm this winter.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/heat-pump-not-working-in-cold-weather\/\" \/>\n<meta property=\"og:site_name\" content=\"St. Louis HVAC Tips - Galmiche &amp; Sons\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GalmicheAndSons\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-09T15:23:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-09T15:23:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/2026\/01\/heat-pump-not-working-in-cold-weather-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Steve Dulle\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@GalmicheAndSon\" \/>\n<meta name=\"twitter:site\" content=\"@GalmicheAndSon\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Steve Dulle\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.galmicheandsons.com\\\/hvac-blog\\\/heat-pump-not-working-in-cold-weather\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.galmicheandsons.com\\\/hvac-blog\\\/heat-pump-not-working-in-cold-weather\\\/\"},\"author\":{\"name\":\"Steve Dulle\",\"@id\":\"https:\\\/\\\/www.galmicheandsons.com\\\/hvac-blog\\\/#\\\/schema\\\/person\\\/b90d5d47a6f393d93d6459a9aa8b2fe1\"},\"headline\":\"Heat Pump Not Working in Cold Weather? 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