Heater Smells Like Burning: 5 Smells and What They Mean

A dusty burningsmell the first time you turn on the heat is normal and should fade within anhour. A smell like hot plastic, rotten eggs, or car exhaust is not normal. Hereis how to tell which one you have and what to do about it.

Dusty Smell: Normal for Up to 1 Hour

Your heatingsystem sat all summer while the AC ran. Dust settled on the burners, the heatexchanger, or the electric heat strips. The first heating cycle burns it off.Open a window, let the system run, and the smell should clear within an hour.

If it lastslonger than that, or comes back every time the heat runs, check the filterfirst. If the filter is clean, have the system looked at.

Electrical or Hot Plastic: A Motor or WiringProblem

This smellssharp and chemical, not dusty. The usual causes are a blower motor running hot,a failing capacitor, a loose wire, or an overheated connection on the heatstrips. Turn the system off at the thermostat and call. Do not keep running itto see if the smell goes away.

Rotten Eggs: Leave the Home, Then Call 911

Natural gas hasno smell on its own. Utilities add a sulfur odor so you notice a leak. If yousmell rotten eggs, do not flip switches or adjust the thermostat. Get everyoneout, then call 911 or your gas utility from outside. Once the utility clearsthe home, call us to check the furnace.

Smoky or Exhaust Smell: Carbon MonoxideRisk

A gas furnacesends its exhaust outside through a vent pipe. If you smell exhaust inside,that venting may be blocked or leaking. Carbon monoxide has no smell, so theexhaust odor is your warning. Turn the furnace off. If a carbon monoxide alarmsounds, leave the home and call 911.

If your homehas gas appliances, keep a carbon monoxide alarm on every level and outsideeach sleeping area.

Musty Smell: A Houston Humidity Problem

Not a burningsmell, but a common one here. Houston humidity leaves moisture in the drainpan, on the indoor coil, and in attic ductwork. When the heat kicks on, itmoves that air through the home. It is not an emergency, but it is worth a lookbefore it becomes mold.

Common Questions in Houston

Is it safe to sleep with the heat on if it smells likeburning? If it is the dusty first-run smell and it is fading, yes.If it smells electrical, like gas, or like exhaust, no. Turn it off and call.

Why does my heat pump smell like burning? Heatpumps use electric heat strips for backup. Those strips collect dust over thesummer and burn it off the same way a furnace does.

Does maintenance stop the first-run smell? Itcuts it down. Maintenance is $109 for the first system and $59 for eachadditional system.

Smell Won’t Clear? Call 281-222-9591

Smell won’t clear? Call 281-222-9591.

Phones  answered 24/7. 2-hour arrival windows. $99 diagnostic.

Beede AC & Heating has  kept homes across West Houston warm since 2010.

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