We need to confirm if you're an ONCOR customer.
Your outdoor condenser is the large box on the outside of your house with a fan inside of it. It's the outdoor portion of your air conditioner system. The faceplate contains a model # and serial # on it. If that number is faded or not visible send a photo of it anyway.
If you're unable to get into your attic (or closet) where the indoor unit is located we need to know if you're aware whether you have a gas furnace or electric heat in your home. Please try to take this photo from as far as possible.