Hi everyone, need some help. My PTAC unit was making strange noises and not cooling the room properly. I cleaned the filters but that didn't solve the problem. The air feels kind of musty and I don't know what else to try. Has anyone experienced anything like this? What should I do next? Feeling a bit stuck.

Hello, if cleaning the filters didn't help, it may be time for a deeper cleaning. I had the same problem a month ago, and it turned out that the inside was full of dust and debris that simply cleaning the filter wouldn't get to. I used this service https://greenductors.com/services/ptac-cleaning/ and it made a serious difference. The device started working like new again. Give it a try before you consider a more serious repair.

Check if the vents are blocked by anything around the unit. Sometimes furniture or curtains can mess with airflow. You could try moving things around or even using a vacuum to get rid of any dust buildup on the exterior vents.