In the unfortunate event of a power surge, electrical damage can occur. This can be caused by devices and appliances within the home being turned on and off. Power surges can affect ducted air conditioning just like any electrical appliances. You can protect your home by installing surge arrestors and by limiting the appliances turned on at once. Also during lightning storms it is recommended to turn off your air conditioning just in case of a lightning strike that can fry your electrical appliances.