Gareth
AUC Fault and HVAC Issues After Sensor Replacement
Summary of the thread
After replacing a sensor in a BMW 3 Series, an AUC fault appeared, and the vehicle's heating and cooling systems are not functioning properly. The core problem may be related to the coolant level or air pockets in the system, which can affect heating performance. Checking and correcting the coolant level and ensuring there are no air pockets are suggested solutions to resolve these HVAC issues.
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2 comment(s)
CarlyMechanic
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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
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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Gareth (community.author)
Having issues with the heaters not getting hot scanned vehicle had fault with auc sensor i have changed this but fault still there