If you are worried about whether the rain will cause any damage to your AC unit, you’re not alone. Luckily, rain doesn’t typically impact your AC unit because it’s made to be exposed to this common weather condition. Slight rain occasionally helps pass away the debris and other build-ups on or around your AC which would otherwise remain stuck and cause you problems. Still, you will need to pay more attention to your AC units during some storms and seasons. For example, fall and spring seasons can cause leaves, debris, and dirt to trap in the unit and slow down the performance. Let’s discuss some ways rain can impact your AC.


How Does Rain Affect Your AC Unity?


Even though your AC unit is created with durable materials that keep it safe during severe weather conditions, some weather conditions can impact the performance of your system. It is always better to understand how the weather will affect your AC to be prepared to avoid any mishaps.


Heavy Storms


Severe weather events, such as severe flooding, are an entirely different story from typical rainstorms. Any water that enters the outside condenser unit could cause a short circuit, failing your system.


While heavy rains typically do not harm your heating and cooling system, the winds that accompany these storms can deposit leaves, plastics, and dirt in the condenser fan filter. Storm-related trash, like branches, can also cause damage to your unit. If the outer unit of your AC is damaged, the internal components may be compromised as well. Therefore, once the storm passes, it is essential to inspect the AC unit from both the inside and outside. If you have a problem, call a local AC company immediately for repairs.


Rusting and Corrosion


Another way your AC system can be impacted by rain is premature rusting and corrosion. This is why some people cover their AC units with a protective covering when not in use. Fortunately, if you provide enough ventilation, the rain will evaporate, and you can prevent rust. Outdoor air conditioning units should be covered during the off-season to avoid this type of damage. However, keep in mind that if the cover of the unit does not allow proper ventilation, excess moisture may get trapped inside. This can cause the internal components to deteriorate, rot, and rust.




While your AC unit should not be damaged by several inches of rain, floodwaters will surely have an impact. The unit’s exterior contains electrical components that should be safe if with water accumulation. However, if the flooding is more serious, you should call an HVAC specialist or local plumber to evaluate the system before turning it back on.


If you are concerned about the health of your AC system, there are some practices you can take to increase the efficiency and performance of your air conditioner. For example, check the wire insulation for cracks and breaks and clean your AC periodically.


Contact a Reliable AC Company for Your Residential Needs


It’s essential to hire a licensed professional if you need help with your HVAC system. Contact a reliable Diamond Bar AC company to schedule an appointment.


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