I recently got a up-to-date gas furnace plan plus the brand up-to-date device started making a whistling sound. I thought that was how gas furnace devices operated until my sibling complained about it. He told myself and others that a heating plan making a noise meant something bad. Since the device was brand new, I was entirely irritated at the thought of it already being messed up. I looked online plus found that a clogged gas furnace filter could be the reason for the whistle noise. The reason the sound happens is that the airflow is being stopped in the system. The air filter could be the cause because if it gets super caked on with dust, no air can get to the system. So the gas furnace has to find a way to transport air in a weird location plus this causes a whistle. I checked the Heating plus A/C filter plus it looked fine. Even though it seemed clean, I did buy a whole up-to-date one plus that did not service the issue. I then looked into other possible troubles plus one was that there is a gap in the ductwork. A small hole between the duct plus the gas furnace’s blower will cause a loud sound. I looked all around in my gas furnace plan plus even had my sibling take a peak, the two of us could not find a gap. I finally called a Heating plus A/C guy into the home to see if the two of us missed something. The guy immediately said the issue was that my ducts were unquestionably too small for the gas furnace device. The gas furnace needs larger ducts for greater airflow. So that was an expensive appointment.