Arrived at call. Water damage could be seen from ceiling. Went into attic and found that the drain pan was full of water and looked like the float switch had failed to open. Cleaned up water and blew out drain lines with nitrogen. Drain feeds into a larger drain exiting side of the house that I could see all the way through. I can’t guarantee that the drain won’t back up again but I could blow through the drain after I cleared it with nitrogen. Due to the age of the system I would recommend replacing it as it is 22 years old. Customer will talk with her husband and call us back to get replacement quotes. Thank you for choosing LBA services. Your technician today, Jake.