It’s hard to tell if those droppings are old or new, so I told the owner of the house that she should call an exterminator just to be safe if she was feeling worried
A lady called me because she thought that she heard noises in the ductwork. A lot of times noises in the ductwork can be explained by the movement and shifting of the ducting itself. Just because you hear noises in the ductwork, does not mean that you have a problem with mice or rats or other indoor vermin. My company handles lots of heating and air conditioner repairs and I’ve only seen infestations a few times. Each one of those times was a separate occasion that was even worse than the first. When I received a call from the residential customer, I knew that she was expecting me to evaluate the ductwork. I took all of the items necessary to handle the job. I have a special camera at the end of a flexible stick and I use that camera to view the inside of the duct work throughout the house. It’s a great way to see inside of the ductwork without taking anything apart. I searched all over the duct work for several hours. I did not see any evidence of mice or rats anywhere, but I did see some evidence of droppings. It’s hard to tell if those droppings are old or new, so I told the owner of the house that she should call an exterminator just to be safe if she was feeling worried. I didn’t want to be wrong about the mice or rats, but I was pretty certain that she did not have an infestation. The noises probably came from the air conditioner or creaking floorboards in the house.