A technician will diagnose your BMW 328i heater using the symptoms you report as a starting point. Because your BMW 328i heater is a complex mechanism that uses an electric fan to blow air through a heater core that is heated by the engine coolant, the problem could be electrical, mechanical, coolant-related, or a combination of these systems.
175F (79.4C) may not be enough to turn on the fan. These are the normal engine temps: 112°C ECO mode (economy) 105°C Normal mode. 95°C Highmode. 80°C High + mapped thermostat mode. so at idle, the fan shouldn't kick on until at least 200°F, probably 220°F or 230°F. also, that is not an aux fan, it is THE fan.
Normally, the auxiliary fan does not turn on unless A) you have your A/C turned on (and your A/C system is working properly), or B) it's a very hot day outside. The A/C and warmer temps will kick on the low-speed setting. I can't imagine anything short of racing or a desert triggering the high-speed setting.
When a BMW X3 cooling fan fails, the fan will not activate or only activate at high speed. You can check cooling fan operation by turning on your air-conditioning and listening for the fan to activate. When replacing your electronic cooling fan, you will want to work with the engine cold and disconnect the battery's negative cable.
Airflow will be the only factor that may be related to the recall. If you cant control blower speed or if you have no blower at all then the recall would most likely fix it. If the ac is blowing but is not cold the problem is related to something else. Sent from my SAMSUNG-SM-G930A using Bimmerfest mobile app. S.
6458 posts · Joined 2012. #11 · Jun 26, 2016. Auc pressure sensor should be located at the auc dryer canister. It determines the pressure and thus controls the fan speed. Fan fault could be linked to the pressure sensor. G30 520d xdrive msport 2017-current. E60 520d 2007 lci saloon-current. E46 320d 2001 saloon-current.
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bmw ac fan not working
