
Here is why it is important to shut your AC down during a thunderstorm:
- Lightning – Lightning striking is always a concern when there is a storm. Lightning rarely strikes a home, but it does happen. When it does, it can trigger a power surge. ...
- AC Damage – Lightning can damage your air conditioner system bad enough it will need replaces. If your HVAC system is running when lightning strikes, it can do irreparable damage.
Should you turn off your air conditioner during a thunderstorm?
Operating your air conditioner during a thunderstorm can lead to some damage to your unit, so it’s best to shut it down when the weather starts acting up. Luckily, humidity and temperature drops when storms roll in, so you’ll get some relief even though your air conditioner is not in use.
Should you run your air conditioning unit during a storm?
If you run your air conditioning unit during a storm, you put your unit –and your house– at risk of a lightning strike. Lightning strikes are rare, but they do happen. Your air conditioner unit connects to your house through utility lines located on the roof.
Can heat and moisture cause thunderstorms?
Although reaching for your air conditioner’s dial to turn up the cold air running through your home might be tempting, we all know that heat and moisture can lead to thunderstorms.
Is it safe to turn off AC during lightning?
This type of system provides an alternate path to ground so lightning doesn't travel through the house circuitry. Even a lightning rod system doesn't provide fail-safe surge protection for sensitive electronics, such as the control panel in your air conditioner, so it's still safer to turn off the air conditioner during a storm.

Should you run your air conditioner during a thunderstorm?
Running your air conditioner during a thunderstorm can lead to a damaged unit, so it's best to turn it off when the dark clouds begin to roll in. Fortunately, the humidity and temperature decrease when it rains, so you'll still have some relief without your air conditioner.
Should I shut my AC off during a thunderstorm?
Lightning rods, conductors, and ground rounds direct lightning safely into the ground and away from your house. However, they don't provide guaranteed protection, so it's best to turn off your AC during thunderstorms just to be safe.
Do air conditioners attract lightning?
Yes, lightning can strike a window air conditioner, particularly if you live in an apartment building or high rise and are further from the ground. However, this is highly unlikely. Lightning strikes are statistically very rare and it is generally safe to leave your window ac unit plugged in.
What should I turn off during a thunderstorm?
Turn off, unplug, and stay away from appliances, computers, power tools, & TV sets. Lightning may strike exterior electric and phone lines, inducing shocks to inside equipment. 4. SUSPEND ACTIVITIES for 30 minutes after the last observed lightning or thunder.
Can I use fan during lightning?
Just stay several feet away from it and you should be fine. One of the wires that connects to the fan is a ground wire. Any dangerous voltage that gets into a table fan, more than likely will take that ground wire to the earth, away from anyone several feet away from it. I wouldn't worry about the fan too much.
Do we need to switch off WiFi during lightning?
Some people can access cellular networks and connect to the internet without their router being on. But if your home WiFi network is your only means of connecting to the web, it's probably a bad idea to turn it off during a storm.
Can you run window AC during rain?
The simple answer? Rain is not harmful to your AC unit, whether it is a central system or window unit.
What is in the air during a thunderstorm?
Thunderstorms form when warm, moist air rises into cold air. The warm air becomes cooler, which causes moisture, called water vapor, to form small water droplets — a process called condensation. The cooled air drops lower in the atmosphere, warms, and rises again.
What happens to the air during a thunderstorm?
During a thunderstorm, the air temperature drops considerably. If you can, consider opening the windows and turn on any ceiling fans to help pull cooled air in and around your home until the storm passes.
What to do if your AC is struck by lightning?
If you think your house or outdoor AC unit was struck by lightning, the HVAC pros at ARS/Rescue Rooter can properly examine your system and determine if any damage has occurred. Call us right away, or book an appointment online to have us inspect your system and check for any air conditioning repair needs.
Can lightning damage an air conditioner?
Air Conditioning Units and Lightning Strikes. Even though lightning striking a home is rare, if it does happen it can really damage your air conditioning system. When lightning strikes, it can send as much as 5 billion joules of energy through your home’s electrical system. That’s way more than enough to damage your cooling system if it’s turned on.
Can I Turn On The AC If It’s Raining?
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.
How To Protect Your AC
Install a high protection system in your house to keep your air conditioner safe. It is especially crucial if you live in a place that’s prone to thunderstorms.
Can I Use My AC During A Thunderstorm?
It is safe to turn on the air conditioner when it rains. Rain does not affect the usual operation of the outdoor unit. Using air conditioners on humid and rainy days can make your home more comfortable-the indoor evaporator coil absorbs moisture and reduces humidity, increasing indoor comfort.
How To Know If Lightning Hit Your Air Conditioner?
The priority is to check the thermostat. If it is off, try to turn it on. If it does not respond, check whether the circuit breaker has not tripped. Even if it does not, turn it off and then turn it on again to reset it. Then replace the battery in the thermostat. If it still doesn’t turn on, be sure to call AC maintenance in Los Angeles to check.
The Damage Lightning Can Cause to Your AC Unit
If lightning strikes your air conditioner, it may affect multiple components. When your air conditioner is off, these parts are slightly damaged:
Is it safe to leave your AC running during a thunderstorm?
But truth be told, leaving your air conditioner on during a storm can be dangerous . Moreover, both the temperature and humidity outside will drop when a storm hits, which means you can stay comfortable without the use of your cooling system.
Can lightning damage AC?
Know the damage. If you decide to leave your AC on during a storm, you should still understand the type of damage that can be done if lightning hits. Because air conditioners are protected by insulation, it’s not likely that the casing will get hot during a lightning strike; however, it is possible that the power surge may melt the plug and damage the electrical circuits in your air conditioner’s control panel.
What happens when you have a thunderstorm?
Lightning during a thunderstorm. Image Credit: Comstock/Stockbyte/Getty Images. When a thunderstorm is imminent, the air is often hot and humid, and that's just the time when you want your air conditioner the most. Both temperature and humidity will drop when the storm hits, though, and until that happens, it's probably worth putting up ...
How far can lightning strike a house?
A positively-charged lightning bolt travels above the clouds and can strike 10 miles or more from its point of generation. Lightning strikes are statistically rare, but they are definitely possible, and one of the most vulnerable points on a house is the electrical service drop located on the roof.
What is the best way to protect your house from lightning?
If you live in a lightning-prone locality, your house should have a protection system consisting of lightning rods, conductor cables and ground rods. This type of system provides an alternate path to ground so lightning doesn't travel through the house circuitry. Even a lightning rod system doesn't provide fail-safe surge protection ...
Can an air conditioner explode?
Moreover, because the refrigerant in the air conditioner is nonflammable, there isn't much danger of an explosion. The power surge may melt the plug and receptacle if your unit has a plug, ...
Can a power surge damage an HVAC unit?
The power surge may melt the plug and receptacle if your unit has a plug, and it will damage the delicate electrical circuitry in the appliance's control panel. The repair will be a major one; you may even have to replace the unit. If you have a central cooling system with an outdoor compressor, lightning could knock out the controls to your entire HVAC system if it hits while the unit is running.
Can lightning knock out a central air compressor?
If you have a central cooling system with an outdoor compressor, lightning could knock out the controls to your entire heating and cooling system if it hits while the unit is running. Advertisement.
Is it safe to turn off an air conditioner during a storm?
Even a lightning rod system doesn't provide fail-safe surge protection for sensitive electronics, such as the control panel in your air conditioner, so it's still safer to turn off the air conditioner during a storm. Advertisement.