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The Reasons Why Your Air Conditioner Lines are Covered in Ice

General

July 3, 2020

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Don’t continue to operate your AC. Leaving your unit on despite the freeze-up may burn out the compressor and motor, which can lead to replacing the entire system.
Don’t scrape or pick off the ice. You’re more likely to damage your equipment. Allow it to thaw completely and naturally.
Don’t replace refrigerant yourself. We’ll say more about that in a bit.

Air filters. Inspect your air filters and replace them if there’s any visible dirt. Check and replace as needed, at least once a month.
Supply vents. Open all supply vents—the vents that blow air out. Yes, even in the rooms you don’t use.
Return vents. Unblock any return vents—the vents that suck air in. These are most often blocked by furniture or curtains.
Dirty coils. Blockages can also happen on the evaporator coils themselves. If you’re mechanically inclined, you can carefully clean them yourself with compressed air, a brush, or mild detergent and water. Check your owner’s manual for details.

Higher-than-normal energy bills
Air coming out of your vents isn’t very cold
Bubbling or hissing noises from your HVAC unit

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The Reasons Why Your Air Conditioner Lines are Covered in Ice

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