Luxaire Biological Growth on Evaporator Coil or in Drain Pan

Luxaire air conditioner causes musty or moldy odors when running.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty evaporator coil, Standing water in drain pan, Poor filtration, High indoor humidity

How to Fix / Troubleshooting

Safety: Wear gloves and a mask when cleaning moldy components. Turn off power before opening panels.

  • Inspect coil and pan: Remove the coil access panel and check the Luxaire evaporator coil and drain pan for slime or mold.
  • Clean coil: Use an EPA‑registered coil cleaner designed to remove biological growth. Follow label directions and avoid overspray on electrical parts.
  • Disinfect pan and drain: Clean the pan with a mild detergent solution and flush the drain line. Consider adding drain pan tablets to inhibit growth.
  • Improve filtration: Use a quality filter with appropriate MERV rating and replace regularly.
  • Control humidity: If humidity remains high, discuss dehumidification options or system adjustments with an HVAC professional.
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Repair Difficulty

Medium 3/5

Required Part

Evaporator Coil
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