{"id":2395,"date":"2026-10-28T08:20:27","date_gmt":"2026-10-28T12:20:27","guid":{"rendered":"https:\/\/callaaatoday.com\/hvac-blog\/?p=2395"},"modified":"2026-10-28T08:20:27","modified_gmt":"2026-10-28T12:20:27","slug":"furnace-first-cold-night-smell-noise-when-to-call","status":"publish","type":"post","link":"https:\/\/callaaatoday.com\/hvac-blog\/furnace-first-cold-night-smell-noise-when-to-call\/","title":{"rendered":"First Time Running the Furnace This Fall? Normal Smells and Sounds vs Signs It Needs Repair"},"content":{"rendered":"
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Midlands Home Comfort • Gas Furnaces • First Heat of the Fall<\/p>\n

First Time Running the Furnace This Fall? Normal Smells and Sounds vs Signs It Needs Repair<\/p>\n

A dusty smell and a few clicks are part of most first runs. Here is how to spot the ones that mean your furnace needs a look.<\/p>\n<\/header>\n

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Direct Answer<\/p>\n

A light burning-dust smell is common the first time a gas furnace runs each fall, and it usually fades within a few hours. A click or two, a quiet whoosh, and some duct ticking are usual too. Call for furnace repair if the smell lingers or smells like hot plastic, or if you hear banging or grinding. A rotten-egg smell or a carbon monoxide alarm is different. Get everyone outside first.<\/p>\n<\/div>\n

Call (803) 889-0686<\/a>
\nSchedule Service<\/a><\/div>\n

AAA Heating & Air, LLC. serves homeowners across the South Carolina Midlands, including Columbia, West Columbia, Cayce, Lexington, Irmo, Chapin, and nearby communities.<\/p>\n<\/section>\n

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The Night You Finally Switch to Heat<\/h2>\n

One evening in West Columbia or Irmo the porch finally gets cold, and somebody switches the thermostat from cool to heat. A few minutes later the house smells like an old toaster. There is a click, a whoosh from the closet, and a tick from the ceiling.<\/p>\n

“Is that supposed to happen?” Usually, yes. Here is how to tell.<\/p>\n<\/section>\n

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What Is Usually Normal on the First Run<\/h2>\n

A warm, dusty smell that fades.<\/strong> Dust settles all summer on the burners and the heat exchanger, the metal chamber that keeps the flame and its exhaust apart from the air you breathe. When they heat up, the dust burns off. Carrier, a major furnace maker, says that smell typically lasts from about 30 minutes to a few hours.<\/p>\n

A few clicks at startup.<\/strong> A gas furnace lights in steps. A small fan may hum first, then a click or two as the igniter, the part that lights the gas, goes to work.<\/p>\n

A quiet whoosh.<\/strong> That is the burners lighting. The main fan often starts a little later, once the air has warmed.<\/p>\n

Ticking or light popping in the ducts.<\/strong> Metal ducts grow a little as they warm and shrink as they cool.<\/p>\n

The key word is brief<\/em>. Normal sounds stay quiet, and normal smells fade.<\/p>\n<\/section>\n

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Signs It Needs a Repair Visit<\/h2>\n

Carrier puts it simply: furnaces should be relatively quiet. Call for a look if you notice:<\/p>\n