Gareth

AUC Fault and HVAC Issues After Sensor Replacement

Hello everyone, I recently replaced the sensor in my BMW 3 Series, and now I'm facing some issues. The scan shows an AUC fault, and the heaters are not getting hot. Additionally, I'm experiencing insufficient cooling and heating. Has anyone encountered similar problems or have any advice on how to resolve these issues? Any insights would be greatly appreciated. Thank you!

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Having issues with the heaters not getting hot scanned vehicle had fault with auc sensor i have changed this but fault still there

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@Gareth wrote on
Having issues with the heaters not getting hot scanned vehicle had fault with auc sensor i have changed this but fault still there

Start by checking the coolant level and ensure there are no air pockets in the system, as these can affect the heating performance. If the coolant level is low or there are air pockets, it can prevent the heater from working properly. Let me know how it goes or if you have any further questions!

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