Martin_B9

Hi, Thank you for your response. I have a single fan, not a dual fan.

Hi, I’m having an issue with the cooling fan on my B9. The engine is overheating, with temperatures going above 90°C. The AC is on, but the fan still doesn’t activate. I tried activating the cooling fan using OBD, but I get a fault: no response from the fan. I’ve checked the fuses and relay, and both are fine. The thermostat is also working properly. I also tested a spare cooling fan, but it didn’t work either, so it doesn’t seem like the fan itself is the problem. I checked the fan connector with a multimeter. The small red wire shows no voltage, while the other three wires do. The main wire reads slightly below 12V (around 11.57V). Has anyone experienced a similar issue or have any ideas what might be causing this? My guess is that one of the wires may be damaged or broken somewhere. Vehicle: Audi A4 2016 (110 kW / 150 PS)