Warning when changing micro filter!!!

gnolivos · 09-27-2023, 08:53 AM

Found this. ALWAYS put in recirculating before changing the cabin micro filter!!!

Barry A. Waters · 03-31-2024, 06:55 PM

This is good info to have. Does it imply that you need to have the car running and in recirculation mode when you replace the filter or can you shut the car off once it's in recirculation mode and then replace the filter?

The reason I ask is that some systems have 'home' positions for flaps like these on power down and then revert to last setting positions when powered up again. If you shut the car down the potential exists for the flaps to move to such a 'home' position, I.E. away from whatever recirculation position it may have been set to when running.

Barry

itsTelly · 03-31-2024, 10:06 PM

Quote:

Originally Posted by Barry A. Waters

This is good info to have. Does it imply that you need to have the car running and in recirculation mode when you replace the filter or can you shut the car off once it's in recirculation mode and then replace the filter?

The reason I ask is that some systems have 'home' positions for flaps like these on power down and then revert to last setting positions when powered up again. If you shut the car down the potential exists for the flaps to move to such a 'home' position, I.E. away from whatever recirculation position it may have been set to when running.

Barry

I recently changed the cabin filter and just turn on accessories mode with the lowest air speed and had no issue.

Barry A. Waters · 04-01-2024, 03:46 PM

Quote:

Originally Posted by itsTelly

I recently changed the cabin filter and just turn on accessories mode with the lowest air speed and had no issue.

That's sounds good enough for me. Reading my manual (I'm new to BMW) it looks like 'Standby State' is the actual term and is activated when either front door is opened from 'Idle State' which is when the car is locked and parked. I'm not making these terms up. When the car is running it's termed 'Drive-Ready State'. Man, to think they actually pay someone to come up with this terminology...

Anyway, unless you can figure out a way to change the Cabin Air Filter without opening either front door (the only kind of door I have on my 430i) you're going to be in 'Standby State' by virtue of having an open door so you can enable Recirculation and select a slow fan speed and the HVAC system would remain in that operating mode while the filter was changed. That works!

Barry

I800C0LLECT · 04-01-2024, 07:55 PM

I lived in Germany for 4 years. They're overly precise about everything. Don't be a syllable off either... It changes everything

MattEcho · 04-18-2024, 02:36 PM

Yeah, this is good info. The first time I tried to change my cabin air filter I didn't do this. Luckily I didn't force it in. I just assumed the filter I had didn't fit right and I would exchange it. So I procrastinated, then came across a YT video explaining this procedure. Glad I did. Changed it out last week and it was easy. Though, why in the world would BMW do it this way, I have no idea.

09-27-2023, 08:53 AM	#1
gnolivos Captain 319 Rep 692 Posts Drives: Various BMW Join Date: Apr 2018 Location: US iTrader: (0)	Warning when changing micro filter!!! Found this. ALWAYS put in recirculating before changing the cabin micro filter!!! Attached Images __________________ Bimmercode best coding options (Basic and Advanced): https://g20.bimmerpost.com/forums/sh...5#post29807925
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03-31-2024, 06:55 PM	#2
Barry A. Waters New Member 2 Rep 5 Posts Drives: BMW 430i Coupe Base Join Date: Mar 2024 Location: Tallahassee, Florida iTrader: (0)	This is good info to have. Does it imply that you need to have the car running and in recirculation mode when you replace the filter or can you shut the car off once it's in recirculation mode and then replace the filter? The reason I ask is that some systems have 'home' positions for flaps like these on power down and then revert to last setting positions when powered up again. If you shut the car down the potential exists for the flaps to move to such a 'home' position, I.E. away from whatever recirculation position it may have been set to when running. Barry
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04-01-2024, 07:55 PM	#5
I800C0LLECT Private First Class 65 Rep 129 Posts Drives: BMW M340 Join Date: Jul 2023 Location: Germany iTrader: (0)	I lived in Germany for 4 years. They're overly precise about everything. Don't be a syllable off either... It changes everything
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04-18-2024, 02:36 PM	#6
MattEcho Private 53 Rep 95 Posts Drives: 2021 M340xi Join Date: Apr 2021 Location: Colorado iTrader: (0)	Yeah, this is good info. The first time I tried to change my cabin air filter I didn't do this. Luckily I didn't force it in. I just assumed the filter I had didn't fit right and I would exchange it. So I procrastinated, then came across a YT video explaining this procedure. Glad I did. Changed it out last week and it was easy. Though, why in the world would BMW do it this way, I have no idea.
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