Why is your air conditioner icing up?
In short: Expert Richard Trethewey explains why ice forms on your AC unit and how to fix it. Learn how to restore proper airflow and when it is time to call in a professional.
Ice buildup on an air conditioner typically indicates an imbalance in airflow between the coil and the condenser unit. To resolve this, you should first replace disposable filters or clean reusable ones to maximize indoor airflow. Reusable filters require cleaning at least once per season, though homes with pets may need more frequent maintenance.
You should also inspect the outdoor condenser unit for obstructions like leaves or droppings, using a vacuum with a brush attachment to clean it without damaging the delicate fins. If these steps fail, the issue may be an incorrectly recharged system or a refrigerant leak, both of which require a professional HVAC contractor to investigate.
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Sources
- Summary by Intellect · source: How to Diagnose a Frosty Air Conditioner | Ask This Old House
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