{"id":1264,"date":"2023-09-18T11:00:00","date_gmt":"2023-09-18T15:00:00","guid":{"rendered":"https:\/\/www.acguyoftampa.com\/blog\/?p=1264"},"modified":"2025-12-17T08:04:11","modified_gmt":"2025-12-17T13:04:11","slug":"classic-signs-of-a-broken-furnace","status":"publish","type":"post","link":"https:\/\/www.acguyoftampa.com\/blog\/heating-service\/classic-signs-of-a-broken-furnace\/","title":{"rendered":"Classic Signs of a Broken Furnace"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"alignright size-medium\"><a href=\"https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"214\" src=\"https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370-300x214.jpg\" alt=\"\" class=\"wp-image-1265\" srcset=\"https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370-300x214.jpg 300w, https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370-1024x731.jpg 1024w, https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370-768x548.jpg 768w, https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370-1536x1096.jpg 1536w, https:\/\/www.acguyoftampa.com\/blog\/wp-content\/uploads\/2023\/09\/iStock-175264986_1920x1370.jpg 1920w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure><\/div>\n\n\n<p>When your furnace kicks on, you hear a bit of a noise, then you feel warmth begin to fill the house, and you stop thinking about it. But in the background, your furnace goes through its paces trying to keep your home warm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Key Signs Your Furnace Needs Repair?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unusual or loud noises coming from the furnace<\/li>\n\n\n\n<li>Pilot light frequently going out or failing to stay lit<\/li>\n\n\n\n<li>A sudden spike in heating bills without increased usage<\/li>\n\n\n\n<li>Weak or inconsistent airflow from vents<\/li>\n\n\n\n<li>Furnace cycling on and off too frequently (short cycling)<\/li>\n\n\n\n<li>Strange odors or burning smells coming from the system<\/li>\n\n\n\n<li>Uneven heating or cold spots throughout the home<\/li>\n<\/ul>\n\n\n\n<p>There are so many components and aspects of its operation that a <a href=\"\/heating\/furnaces\" target=\"_blank\" rel=\"noreferrer noopener\">broken furnace in Tampa, FL<\/a> isn\u2019t exactly uncommon. Let\u2019s talk about what signs you can\u2019t ignore and what they mean.<\/p>\n\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\">What Loud Noises from Your Furnace Could Mean<\/h2>\n\n\n\n<p>You know your furnace. You know that it usually runs a big loud at the start, but quickly quiets down and fades into the background. But now you\u2019re noticing that it\u2019s loud, or perhaps you just hear a noise that you know it normally doesn\u2019t make. You\u2019re right to be concerned.<\/p>\n\n\n\n<p>The problem is, this in itself isn\u2019t a problem, just a signal that something\u2019s wrong. There could be a multitude of issues under the surface, but the only way you\u2019ll know what it is for sure is when you have an HVAC technician take a look.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Your Furnace Pilot Light Won\u2019t Stay Lit<\/h2>\n\n\n\n<p>When your pilot light goes out, it\u2019s likely because there\u2019s soot buildup around the flame sensor. The whole job of a flame sensor is to make sure there\u2019s a flame going that keeps your furnace moving, and if that flame goes out, any gas in your furnace that\u2019s not been burned yet could escape into your home\u2019s air.<\/p>\n\n\n\n<p>The flame sensor makes sure that doesn\u2019t happen. But it could be so dirty that it thinks there\u2019s no flame even though there is, causing it to kill the pilot light as a defense mechanism. By the way, it\u2019s good that it\u2019s doing its job, but it\u2019s also impeding your ability to heat your home. This takes a service call to repair properly without voiding your furnace\u2019s warranty.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Unexpected Heating Costs? Your Furnace May Be Failing<\/h2>\n\n\n\n<p>Heating season kicks in, you get your first bill, and it\u2019s astronomically higher than the same bill from this time last year. If the gas rate hasn\u2019t gone up and it\u2019s not an exceptionally colder season than last year, that bill might stand out to you\u2014as it should.<\/p>\n\n\n\n<p>Your furnace has a level of efficiency, defined by an AFUE rating. This tells you how much fuel gets turned into warm air for your home. But even with that rating, it can drop when your furnace hasn\u2019t been maintained or it has a broken component that, although doesn\u2019t impair its operation, does make it work harder to achieve the same results.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Act Fast on These Furnace Warning Signs<\/h2>\n\n\n\n<p>Furnaces have so many potential problems that can spring up, and it\u2019s important to pay attention to them all. We\u2019re ready to help you fix any furnace problem you run into, and set you up with proper maintenance moving forward so that you have a low chance of running into these again. All it takes is a phone call.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<p><strong>Question: What are classic signs that a furnace might be broken?<\/strong><strong><br><\/strong><strong>Answer:<\/strong> Classic signs include unusual and loud sounds that aren\u2019t normal for your unit, a pilot light that repeatedly goes out, and heating bills that suddenly spike without obvious cause. These indicate inefficiency or internal problems with your furnace.<\/p>\n\n\n\n<p><strong>Question: Why do unusual furnace noises matter?<\/strong><strong><br><\/strong><strong>Answer:<\/strong> If your furnace starts making noises it didn\u2019t make before, such as banging, rattling, or excessive loudness, it often signals worn or failing internal components that need professional inspection and service.<\/p>\n\n\n\n<p><strong>Question: What does it mean if my furnace\u2019s pilot light keeps going out?<\/strong><strong><br><\/strong><strong>Answer:<\/strong> A pilot light that frequently extinguishes usually means there\u2019s soot buildup or a dirty flame sensor, preventing the furnace from maintaining fire and proper heat output. This needs servicing to avoid inefficiency or safety issues.<\/p>\n\n\n\n<p><strong>Question: Can a broken furnace cause high heating bills?<br>Answer:<\/strong> Yes. A furnace that is working harder than it should because of inefficiencies or internal issues will consume more energy, leading to noticeably higher heating costs even if the weather hasn\u2019t changed.<\/p>\n\n\n\n<p><strong>Question: Are there other common signs a furnace is failing?<br>Answer:<\/strong> Other common signs include inconsistent heating throughout the home, short cycling (frequent on\/off cycles), and a flame color that looks yellow rather than blue \u2014 which can signal incomplete combustion or potential safety hazards.<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are classic signs that a furnace might be broken?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Classic signs include unusual and loud sounds that aren\u2019t normal for your unit, a pilot light that repeatedly goes out, and heating bills that suddenly spike without obvious cause. These indicate inefficiency or internal problems with your furnace.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why do unusual furnace noises matter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"If your furnace starts making noises it didn\u2019t make before, such as banging, rattling, or excessive loudness, it often signals worn or failing internal components that need professional inspection and service.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does it mean if my furnace\u2019s pilot light keeps going out?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A pilot light that frequently extinguishes usually means there\u2019s soot buildup or a dirty flame sensor, preventing the furnace from maintaining fire and proper heat output. This needs servicing to avoid inefficiency or safety issues.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can a broken furnace cause high heating bills?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. A furnace that is working harder than it should because of inefficiencies or internal issues will consume more energy, leading to noticeably higher heating costs even if the weather hasn\u2019t changed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are there other common signs a furnace is failing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Other common signs include inconsistent heating throughout the home, short cycling (frequent on\/off cycles), and a flame color that looks yellow rather than blue \u2014 which can signal incomplete combustion or potential safety hazards.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n\n\n\n<p class=\"has-text-align-center\"><a href=\"\/contact\/send-message\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Contact The A\/C Guy of Tampa Bay Inc. today<\/strong><\/a><strong> to schedule your furnace repair as soon as possible.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let\u2019s talk about what signs you can\u2019t ignore and what they mean.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[107,108,100],"class_list":["post-1264","post","type-post","status-publish","format-standard","hentry","category-heating-service","tag-furnace","tag-furnace-repair","tag-tampa"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/posts\/1264"}],"collection":[{"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/comments?post=1264"}],"version-history":[{"count":5,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/posts\/1264\/revisions"}],"predecessor-version":[{"id":1953,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/posts\/1264\/revisions\/1953"}],"wp:attachment":[{"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/media?parent=1264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/categories?post=1264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.acguyoftampa.com\/blog\/wp-json\/wp\/v2\/tags?post=1264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}