Does an AC compressor get damaged in the rain?

Author: Claudia Flatley I  |  Last update: Thursday, March 5, 2026

Rain falling over your AC unit shouldn't cause any damage. But, rainwater collecting around the unit is a different story. An inch or two of standing water shouldn't interfere too much, but the risk sets in when that water gets high enough to enter the unit.

What happens if an AC compressor gets wet?

The electrical components and wiring are the parts that are most likely to suffer damage when exposed to water. This could lead to a short circuit that could burn out the compressor and fan motors if you were to turn the unit on.

Can an AC compressor be kept in the rain?

Yes, you can. Rain itself usually does not harm your air conditioner.

What happens if an AC unit gets rained on?

Rain alone will not harm your air conditioner. In fact, turning the system on during warm, rainy days can make your home feel much more comfortable. The only time you would need to be concerned is if the rain was severe enough to leave standing water around the unit. In that case, it would be wise to power it down.

What happens if an air compressor gets rained on?

Can an air compressor get wet? As you know, moisture is the biggest enemy to any air compressor. Making sure to protect it from rain & snow would be critical to the longevity of your machine. Moisture in a machine can cause rust in your tools & equipment.

Should I Be Worried About Rain or Weather Damage to My A/C Unit?

Can an air compressor be left out in the rain?

Keep the compressor dry: If possible, store your air compressor in a dry location when not in use. If it must be left outside, make sure it is covered with a waterproof tarp or stored in a weatherproof enclosure.

How do you know if your AC compressor is damaged?

A good way to tell if your compressor is starting to develop a problem is to hold your hand near the fan on the air conditioning unit. If that air is not hot but is instead lukewarm or cool, it's a sign that your compressor could be having problems. It could mean the unit is not compressing the gas properly.

Do I need to cover my AC unit when it rains?

The fact of the matter is that it isn't necessary to cover your air conditioner for winter or cold weather, or at any other time in the spring, summer, or fall. The outdoor unit is designed for outdoor installation and can withstand even extreme weather, including rain, high wind speeds, snow, winter storms, and ice.

What to do if AC unit stops working after rain?

If your AC is not working after a storm, you may be dealing with one of these problems: Tripped breaker. Failed capacitor. Obstructed or damaged outside unit.

What happens if water gets in an AC unit?

Flooding damages the electrical components of your air conditioning system, and prolonged exposure to water can cause your system to deteriorate as well. It is important to have your HVAC system professionally inspected after a flood.

Is an air conditioner compressor waterproof?

In conclusion, while air conditioners are not entirely waterproof, they are designed to endure rain and standard wet conditions. Regular maintenance and proper installation can help mitigate any potential damage from water exposure.

Is it necessary to cover an AC outdoor unit?

If you're considering covering your outside AC unit in the summer, whether to protect it from bad weather or to possibly save energy, the reality is that you should never cover your AC unit – not even during bad weather. For one thing, outdoor AC units are specifically designed to live outdoors.

What temperature can AC compressor be outside?

Because it is outside most people's comfort zone, practically all air conditioning systems are designed to ensure that the system will not run when the outside temperature is below 60 degrees Fahrenheit. In most cases, running an air conditioner below this temperature is not safe.

What happens if water enters a compressor?

Water can cause rust and damage to air compressor systems and tools, and hot discharged water can be dangerous to operators.

Can an AC compressor burn out?

Compressor burnout is certainly something you never want to happen to your air conditioner, so our short answer is going to be a resounding, “yes!”

Can my AC condenser get wet?

Yes, for sure you can. Spraying or splashing water on the condenser unit of an AC won't hurt it, it will increase the cooling efficiency momentarily, and it will help flush out any dust or dirt that might have accumulated due to the airflow through the unit.

Can heavy rain affect AC unit?

I​f you're concerned about rain on your air conditioner, don't be. Rain does not threaten your unit and can even clear out clogged debris from the inside of your unit. It is this debris that poses a great threat to your unit as it can block airflow and wear down important pieces.

Is it OK to keep AC outdoor unit in rain?

Wondering if your outdoor AC unit needs protection from rainfall? No, you should not cover your outdoor AC unit when it's raining. You may reach for the umbrella when the rain starts to fall, but your AC unit was designed to withstand most elements of nature.

Why does my AC stop when it rains?

Even though heavy rains cannot damage your AC unit, the winds accompanied by the same rain can leave dirt, leaves, twigs, and other debris to damage the condenser fan grille. Even objects falling on your unit, such as tree branches, from the storm can cause damage.

Should you cover an air conditioner compressor?

Your air conditioner's coils are also designed to handle extreme weather conditions. Since A/C units are made with first-rate materials and have a solid finish, it's usually not necessary to cover them when they're not in use. In fact, most manufacturers do not recommend covering your air conditioner.

Is it OK for a window AC unit to get rained on?

As long as the window AC is working correctly, the rain will not damage it. Just like a central AC outdoor unit, window air conditioners are designed to be exposed to the elements. However, if your window air conditioner is full of water after rain, you have a drainage issue.

What happens if you turn an air conditioner on its side?

When you lay your portable air conditioner on its side or tilt it at an angle, certain parts of the compressor are deprived of lubrication oil. This causes the compressor's components to collide, resulting in wear and tear.

What damages an AC compressor?

High voltages can also damage the motor causing the compressor to overheat. Moreover, dirty coils, low refrigerant levels, and lack of insulation; all can contribute to compressor overheating, ultimately resulting in compressor failure.

How much does it cost to replace an AC compressor?

On average, AC compressor costs range from $800 to $2,300, with most folks paying $1,200 for a new one. However, your price will vary depending on factors like the size and brand of your compressor. Before you schedule your replacement, read on to learn about all AC compressor cost factors.

How long do AC compressors last?

Most compressors have the same or similar life expectancies as traditional AC units. They typically break down after 15 years but can last longer with proper maintenance. Many people believe replacing their air conditioner's compressor is more cost-effective once it gives out.

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