Blower motor

e53sg · #1 03-08-2018, 09:43 PM

I have a 2005 E53 4.4 X5. I recently had a battery issue, and after replacing the battery I have no blower for the climate control system. The display for the controller seems to be working but no AC or heat. I forget the fuse numbers but I checked both, according to the owners manual, and both are good. Previously the blower motor made noise if I made a hard turn but no other issues. Is there a way to determine if the blower is getting power or not?

cn90 · #2 03-08-2018, 10:12 PM

I wrote a detailed trouble-shooting guide for E39 5-series car.
Basically to diagnosis blower motor vs FSR.

Here is the guide...The bottom line is: jump appropriate sockets, if the blower motor runs, then the FSR is bad (if this is the case, use only BMW OEM FSR!)...

DIY: Trouble-shooting HVAC Blower Motor and FSR
DIY: Trouble-shooting HVAC Blower Motor and FSR - Bimmerfest - BMW Forums

e53sg · #3 03-08-2018, 10:33 PM

Ok that is interesting. I had this random battery issue. The battery would get low and then the alarm would start going off.

upallnight · #4 03-09-2018, 12:30 PM

Quote:

Originally Posted by e53sg

Ok that is interesting. I had this random battery issue. The battery would get low and then the alarm would start going off.

A bad FSR is a known issue to drain a battery. When the blower was working, was it at all the speeds or just at the high-speed setting?

e53sg · #5 03-09-2018, 02:06 PM

It was working at all speeds. Where is the FSR LOCATED?

andrewwynn · #6 03-09-2018, 03:27 PM

Over the transmission hump under the dash. Access behind panel on the right side of transmission hump.
Bad FSR is a very common cause of drained battery.

When wife's FSU went bad the only indication was the parasitic drain it worked at seemingly all speeds.

e53sg · #7 03-10-2018, 01:13 AM

another piece of the puzzle. The rear fan works, and has multiple speeds. Sounding more like the FSR or fan. If I hit the defogger button the rear air cuts off, so it seems like the controller is working.

Scott ZHP · #8 03-10-2018, 01:42 PM

Quote:

Originally Posted by e53sg

another piece of the puzzle. The rear fan works, and has multiple speeds. Sounding more like the FSR or fan. If I hit the defogger button the rear air cuts off, so it seems like the controller is working.

Rear fan has its own FSR.

e53sg · #9 03-28-2018, 11:15 PM

I had a bit of a detour as my drivers side window regulator failed and had to get that fixed so I could park it outside. Back to replacing the FSR... Does anyone have pics of the tabs that hold it in?

e53sg · #10 03-30-2018, 08:38 AM

Replaced the FRS and problem solved. I had a wait a minute pause after installing and within a few seconds the blower came on.