Protect External Air Conditioning Components From Storms

AC components aren’t exactly fragile, but severe weather can ruin them if precautions are not taken.

Spring and summer weather patterns are approaching, and homeowners must prepare outdoor spaces, including the air conditioner compressor or exterior portions of wall and window units.

These components aren’t exactly fragile, but severe weather can ruin them if precautions are not taken. Seasoned homeowners will know what to do, but those new to an area and those moving out on their own for the first time may need more information.

Rain Is OK

First, rain itself is not the problem. Any portion of an air conditioning system that sits outside should be manufactured to withstand expected weather phenomena. If the exterior half of a wall air conditioner is exposed to rain, the unit should be able to handle that if it was made and installed properly.

Covers for exterior components can be purchased for those nervous about a heavy storm or just wanting to avoid cleanup (since rain will bring downed leaves). These range from complete hoods that sit over compressors to covers for window and wall units.

Flooding Is Another Matter

The components could be damaged if it rains so much that the region floods or if a hurricane hits. Floodwaters can seep through connections and small openings in casings. Stagnant floodwaters that don’t recede for a long time can contribute to corrosion, especially in older units.

Exterior compressors may benefit from secure covers, but unless the whole cover is taped down so that there are no openings, the covers may still not keep out floodwaters. In that case, once the flood subsides, the air conditioner should not be used until the compressor has been inspected and cleared.

Window and wall units are usually positioned a little higher. Some wall units are located toward the ceiling, but many are below windows. Major flooding requires the same response as it does for compressors. Minor flooding that doesn’t really reach the unit can still affect the wall and wiring, and the water can seep inside through points around the units.

Covers can be purchased and sealed as much as possible. However, the unit still needs to be inspected to ensure safety, and it is crucial to avoid any contact between water and wiring.

Wind Can Go Horizontal

Another issue is wind, which can drive rain horizontally in strong storms. These winds can also send debris flying into the sides of the units, clogging filters. Soft covers are available that can be used (essentially the same as the ones to cover units facing rain); these should be placed over units not in use.

However, those covers won’t help when the air conditioner is needed during a storm. In those cases, a barrier that sits away from the unit but blocks wind is best. Shrubs with good root systems or a small but sturdy fence could work.

Hail Is a Problem

Metal covers for exterior compressors can be purchased, and it may be beneficial to check with air conditioner installers about what they might offer and what size of hail the covers can withstand.

Forecast Heating, Cooling, and Refrigeration serves residential and commercial customers in Summerlin, Anthem, North Las Vegas, Boulder City and Las Vegas. Call us at 702-919-4546.