No, you should never cover your outdoor heat pump unit with a tight plastic tarp, garbage bag, or waterproof cover during an ice storm or freezing winter weather. While homeowners often want to protect their outdoor equipment from severe ice accumulation, wrapping a heat pump creates an airtight seal that traps condensation, encourages internal electrical corrosion, and blocks necessary airflow. Furthermore, if someone accidentally turns the heat pump on while it is tightly covered, the unit will starve for air, overheat rapidly, and suffer catastrophic compressor failure. However, you can protect the top fan grille from falling icicles or heavy debris by placing a rigid, flat piece of plywood or a breathable mesh cover directly on top, provided the sides remain completely open for airflow. You can verify safety by ensuring side vents are unobstructed.
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