Maintenance Guides / HVAC & Air Quality

Winterize window AC unit

Difficulty: easyTime: 45 minsEst. Cost: $10 - $30

Why it matters

Freeze damage to coils; drafts from unfastened units cost heat.

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How to do it

  • 1

    Turn off and unplug the AC unit completely.

  • 2

    Remove from window or secure cover tightly.

  • 3

    Store indoors in a dry location if portable.

  • 4

    Seal the window opening with foam insulation strips.

  • 5

    Check seals before reinstalling in spring.