I tried running my heater the other day, due to it becoming a bit chilly where I live, and noticed that there was no heat coming out, even after running the car for a while. I have no check engine light, ran a fault code check using my obd2 sensor, but still nothing shows up. I'm a bit concerned since this is my daily driver that I'll be using during the winter months, but I'm not sure how to diagnose my problem. Can anybody provide any input about what my issue may be and how to confirm it?