What are the most common issues with Audi A4 cabin heating?

I've noticed that my Audi A4's cabin heating isn't working very well. What are some of the usual problems that can cause this issue?

The most common problem with Audi A4 cabin heating is a faulty heating element. This can be caused by wear and tear or electrical issues. It's best to have a professional inspect and replace the element.

Another common issue is a clogged or malfunctioning heating fan. This can be due to debris or damage in the fan system. Have it checked and cleaned by a mechanic to restore proper heating function.