Need tools: 2004 Audi a4.
1. Start the 2004 Audi a4. After a certain period of time, you can turn on the switch to turn on the warm air.
2. Adjust the cycle mode of 2004 Audi a4 air conditioner to internal cycle.
3. Turn the 2004 Audi a4 temperature control button to above 25 degrees, and the warm air will be officially turned on.
4.AC stands for air conditioning compressor. The 2004 Audi a4 does not need to turn on the heater.
5. Adjust the gear of 2004 Audi a4 air conditioner to the appropriate gear, and adjust the wind direction of the air outlet.