Three Common HVAC Odors Explained

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Three Common HVAC Odors Explained

Regardless of the age of your home’s HVAC system, you may occasionally notice unusual odors while running the air conditioning or heater. Strange smells are sometimes part of a normally functioning HVAC system, but they may also point to problems that need to be addressed. Here are three common odors you may notice and a look at their possible causes. 

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Two people pinching their noses at an unpleasant odor indoors

HVAC ODORS EXPLAINED

Electrical or Burning Odors

When you turn on the heater for the first time in months, you’ll likely notice a burning, electrical smell as dust burns away from the heating elements. In this case, the odor isn’t a cause for concern, but if you notice a burning smell that persists or appears out of nowhere, you may have an electrical problem that requires professional repair. Simply turn off your system until a technician can inspect and diagnose the issue. 

Moldy or Musty Odors

Moldy and musty odors are common issues with residential HVAC systems. While running, air conditioning units create a lot of condensation. If that water doesn’t drain properly, it can seep into ducts and quickly cause mold or mildew buildup. Such issues should be addressed as soon as possible, as mold and mildew can cause a range of respiratory and allergy problems. 

Gassy or Rotten Egg Odors

Natural gas is naturally odorless, but many utility providers add a sulfurous scent that alerts homeowners to a dangerous gas leak. A gassy smell similar to rotten eggs coming from your HVAC system could indicate a gas leak. If you suspect this to be the case, act quickly. Open several windows and leave your house until the gas company arrives to address the problem. 

HVAC odors are sometimes harmless, but they can also indicate dangerous functional problems. Since 1981, American Energy Home Pros has been addressing a wide variety of residential and commercial HVAC issues in Greater Sacramento, as well as offering HVAC installations.

If you notice strange odors from your system, call us at 1-916-520-9990 for a free estimate or emergency assistance.

Hear what our customers are saying

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2 weeks ago

Carter from American Energy exceeded my expectations for a standard inspection. He left our HVAC system looking bright and shiny! He called before and was able to come by early. Really appreciated that!

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3 weeks ago

Greg Rangel was on time, gave me a courtesy call before he arrived, and once he arrived, he called to find out the issues with the AC and got to work. Greg provided me with information about the AC unit after he found out what was happening, and he walked me through the process and the cost! He also changed the filter! I am now a member due to his outstanding customer service. Thank you, Greg, for your professionalism.

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3 weeks ago

This company responded immediately to address an air conditioning problem for my elderly Mother during 100 degree heat. They responded in just a couple of hours. Greg Rangel was the technician and fixed the problem. He did explain the unit was older and would soon need replacement. He thoroughly explained this to me and offered a senior discount for my Mother and a lower priced unit. Job well done and thank you.

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a month ago

Technician conducted a thorough inspection of the HVAC system while maintaining a friendly and positive demeanor.

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2 months ago

I recently had an air duct cleaning and I am very happy with the results. The team was so knowledgeable and personable. I would use them again for this or other HVAC needs.

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2 months ago

Quick scheduling and professional service. I will use them again and again. Thank you!!

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3 months ago

Great A/C service by Garrett. He was very thorough and knowledgeable on his service. Would highly recommend.

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4 months ago

Truly professionals. Garrett showed up at scheduled time, answered all my questions and did a thorough inspection of my unit. Never felt pressured or like I was trying to be sold on anything. He explained everything along the way. An issue was found on some wiring outside, I was shown the issue and given the option to have it fixed. He showed me the completed work and the material used. I would highly recommend this locally owned and operated company.

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8 months ago

Greg arrived late Saturday evening and worked out the problem. He explained the problem and eventually determined it began with the original set up of the thermostat, which was wrong for a heat pump. The problem was fixed, and great credit to Greg for being enthusiastic, professional and staying until it was done.

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a year ago

We have had a great experience with everyone from American Energy. Today we had David, and he is a very nice young man, respectful, knowledgeable and very professional. I would recommend this company to all my friends and family.