Tips for Repairing a Smelly A/C in Your Phoenix HomeOdors from your A/C can be a constant nuisance if you’re running it around the clock. Whether the odors and smells from your A/C are moldy or of unknown origin, you can use these tips for repairing a smelly A/C in your Phoenix home.

What’s That Smell?

Many common smells and odors from A/C systems are caused by mold, mildew and bacterial growth on the evaporator coil. This is because a substantial amount of water is produced by condensation on the evaporator coil inside the air handler. This water residue can invite microorganisms into your air ducts, attracting debris and dirt/

Repairing a Smelly A/C

You can repair musty and moldy smells in your A/C system by cleaning and disinfecting your components. Here’s how:

  • First, make sure your A/C is turned off.
  • Then, access the evaporator coil by removing the appropriate panel of the air handler. Air handlers are typically located in an HVAC closet or in the attic, while evaporator coils are generally constructed of copper tubing. There will also be aluminum fins around the coil.
  • Next, inspect the coil, fins and drip pan for debris, mold and mildew.
  • Use a foaming-spray cleaner for A/C evaporator coils, and spray the coil, fins and drip pan.
  • Then, just follow the instructions on the spray cleaner, which generally involves wiping all components with a soft cloth.
  • The fins may need extra work, so very gently use a stiff brush to remove any remaining contaminants.
  • Afterwards, check the secondary drip pan beneath your air handler for any signs of contaminants or moisture, and clean as necessary.
  • Finally, make sure to schedule an A/C maintenance appointment with your HVAC technician for a thorough cleaning and inspection of your A/C and ducts.

For more tips on repairing a smelly A/C in your Central Arizona home, please contact Wolff Mechanical.

Our goal is to help educate our customers in the Phoenix Valley area of Arizona about energy and home comfort issues (specific to HVAC systems). 

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