The short answer
Why Hail Damages AC Units
Hailstones can dent the aluminum fins and coil of your outdoor AC condenser. Even small hail can bend the delicate fins, which reduces airflow and makes the system work harder. Large hail can puncture the coil, causing refrigerant leaks and complete system failure.
The unit's fan and motor are also exposed. Hail can crack the fan blades or jam the motor, leading to overheating or electrical shorts. If the unit sits low to the ground, water from melting hail can pool around the base and seep into the electrical connections. Protecting the unit before a storm is far easier than repairing it after.
Install a Hail Guard or Cover
A hail guard is a protective cage that fits around the condenser unit. It blocks hail while still allowing airflow, so the AC runs efficiently. You can buy a ready-made guard or have a local fabricator build one. Make sure it is tall enough to shield the sides and top.
A breathable cover is another option, but it must be removed when the AC runs. Use one only during a storm. Never use plastic sheeting or a tarp that traps heat, as that can cause the compressor to overheat. Secure the cover with bungee cords or straps so wind does not rip it off.
- Measure your unit's dimensions before ordering a guard.
- Choose a guard with small enough gaps to block hail.
- Anchor the guard to the ground or wall with brackets.
- Check the guard after each storm for dents or loose parts.
- Keep spare covers handy if you live in a hail-prone area.
Anchor and Elevate the Unit
Strong winds during a hailstorm can knock a poorly anchored AC unit over or shift it off its pad. Check that the unit sits level on a solid concrete pad and is bolted down. If it is elevated on a stand, ensure the stand is rust-resistant and bolted to the foundation.
If your unit is on the ground, consider raising it a few inches with a stand. This keeps melting hail water from pooling around the base. In areas with wet winters, extra elevation also helps with normal drainage. A stable, elevated unit is less likely to suffer damage from flying debris.
Trim Trees and Clear Debris
Overhanging branches can snap under hail weight or wind and fall onto the AC unit. Trim back any limbs that hang directly above the condenser. Also remove dead branches that could become projectiles during a storm.
Clear leaves, pine needles, and other debris from around the unit. During a storm, debris can blow into the fins and block airflow. After the storm, check the unit for leaves and twigs that may have been driven into the coil. Keeping the area clean reduces the chance of damage.
After the Storm: Check and Act
After hail passes, inspect the AC unit from a safe distance. Look for bent fins, dents, or visible holes. If you see any damage, turn off the power to the unit at the breaker. Do not run the AC until a professional has checked it.
If water entered the unit or the surrounding wall, you may have water damage inside your home. Look for stains on ceilings or walls near the AC. If you find any, contact local water damage pros for an inspection. They can assess the extent and dry out affected areas to prevent mold.
- Shut off power at the breaker if you suspect damage.
- Take photos of the damage for your records.
- Call an HVAC pro to repair the unit.
- Inspect indoor walls and ceilings for water stains.
- If you find water damage, schedule a moisture check.
- Keep your insurance policy details handy.
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Call Now (425) 407-5186Frequently asked questions
Can I use a regular tarp to cover my AC during hail?
A regular tarp can trap heat and moisture, which may damage the compressor. Use a breathable cover designed for AC units, or a hail guard that allows airflow. If you use a tarp, remove it immediately after the storm.
What if my AC is on the roof?
Roof-mounted units are harder to protect. A hail guard is still the right option. Secure the guard to the roof structure, not just the unit. After a storm, check for roof damage too, as hail can compromise shingles and lead to leaks.
Will my insurance cover AC damage from hail?
Policies vary, and your insurer decides what is covered. Check your policy for hail damage coverage. Take photos of the damage and keep receipts for any temporary covers you buy. Contact your insurance company to file a claim if you have coverage.