Why isn't the Audi A6 producing any heat?

I have been driving my Audi A6 for a few months now and I noticed that the heat is not working properly. No matter how much I turn up the temperature, it remains cold. What could be causing this issue and how can I fix it?

It is possible that your thermostat is malfunctioning and needs to be replaced. This can cause your Audi A6 to not produce any heat.

Another common issue could be a faulty heater core, which can also lead to a lack of heat in your Audi A6. It may need to be replaced or flushed to fix the problem.

Check your coolant levels and ensure they are at the appropriate level. Low coolant levels can also cause issues with your Audi A6's heating system.