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Michael Austin Posted on Sep 19, 2014
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How do I troubleshoot BMW 325i heat/ac blower? It suddenly stopped working.

Checked fuse block - removed both fuses associated with blower and both look fine. Although the blower will not work at any setting, when I set it to any speed, the AC compressor comes on. I think this means fuses and switch are OK. Following may be pure coincidence, or, failure may have a causal relationship to this - - Between the last time the blower had worked and now, I had seriously sprayed car with garden hose to clean off accumulated choke cherries. This included running a lot of water across bottom of windshield to clear off wiper blades, recess, etc. Wonder if I inadvertently "flooded" blower, causing the failure. Car had been idling while I was running the water (blower may have been on.) My 325i service manual (Bentley) shows a fuse resister block (apparently a part of blower wiring?) In order to troubleshoot, is my next step to remove the blower? (GASP.) Or, is the resistor block the likely culprit to look at first? It appears that access to those two parts - blower and resistor pack - are approached through two different, and both MAJOR, procedures - blower from front of firewall, while resistor block is accessed behind passenger dash, after removing glove compartment and air bag (again, this is according to the Bentley service Manual)? Finally, any chance of repairing blower motor, or is it replacement time? Thanks much for your time. Michael

1 Answer

mensa man

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  • BMW Expert 113 Answers
  • Posted on Nov 03, 2014
mensa man
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Joined: Jun 26, 2011
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REPLACE THE FINAL RESISTOR PACK, THEY GO OUT ALL THE TIME.

5 Related Answers

Anonymous

  • 958 Answers
  • Posted on Oct 19, 2008

SOURCE: 2005 dodge grand caravan

check the fan blower relay. this is the one powering up the blue wire going to the motor.

maybe it has a separate fuse. check from other locations. could be in the passenger kick panel.

tnx 4 using fixya,

drcool

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Anonymous

  • 308 Answers
  • Posted on Aug 04, 2009

SOURCE: 1998 BMW 328i heater/AC blower is not running

You have clean the blower unit , may be its dirty then . and then check the blower resistor unit for malfunction.

Anonymous

  • 1 Answer
  • Posted on Jul 26, 2010

SOURCE: where is fuse for drivers side heated seat on 2006 Buick Terraza

i have a 2005 terraza and the fuse panel is at the end of the dash board on the passengers side .there is a finger slot in a plastic cover,pull to remove. fuse panel is behind .i had to call a service tech to find mine. good luck pete.

Anonymous

  • 1796 Answers
  • Posted on Feb 22, 2011

SOURCE: I have a 2004 Lincoln Navigator. Over the weekend

hI!
On the Right Kick Panel Fuse/Relay Box check fuses 11 10A, 20 30A, 27 5A and 111 50A. Check that the Air Suspension Service Switch is turned ON, check the two Front Height Sensors, wire Red/Blk is the power to the sensors and should be hot as soon as the Ignition Key is turned ON, if the sensor feels the suspension is Low, sends a signal to the Air Suspension Module which turns the compressor ON to level the vehicle.
If the fuses are OK, and the sensors receive power, the module could be faulty.
If the system is airtight, applying 12+ to the GRY/RED and ground the LT GRN/RED (it should be grounded already) will start the compressor and level the vehicle. The PINK wire is the ON/OFF signal coming from the module. If vehicle is below proper level, it should be hot.
THERE IS A KIT THAT U CAN PURCHASE FROM KRAGEN TO REPLACE THE AIR BAG SYSTEM, ITS A REALLY GOOD KIT COMES WITH REAR COILS AND FRONT AND REAR SHOCKS , TRUCK SEEMS TO RIDE A LOT BETTER THAN WITH THE AIR BAGS < AND U DONT HAVE TO DEAL WITH ALL THAT AIR BAG PROBLEMS < IVE USED THEM LOTS OF TIMES AND CUSTOMER IS ALWAYS HAPPY WITH VECHICLE RIDE
Good Luck! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

Freddy

  • 1311 Answers
  • Posted on May 05, 2011

SOURCE: Hi, I have a 2006

The interior fuse box is located on the left side (driver side) end of the dash, it is behind a small access door.

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How do I troubleshoot a failed blower (motor?) in a 2001 BMW 325i?

Hi, Micheal Your car was tested when new to not let moisture into any electrical components at the factory, however with age and use sometimes a little water can sneak in. You are correct in assuming the Circuit Resister Block has been affected. That is where I would go 2nd following the fuse 1st. If the fuse is powered and good, check to see if you have power to the blower itself and you have no voltage at the blower the inline circuit fused link is suspect. If there is voltage at the blower and it is not working I'm afraid you may have burned the blower motor. NEVER EVER spray cold water on a warm~running engine. possible effects: cracked head~block, shorted ignition circuit, or other electric components. While you car is designed to resist water, They generally cannot protect it from COLD water sprayed directly onto it. That I'm afraid is physics. I hope this helps you Sir. Good luck, I'm here if you have further insights. Thank You for using FixYa.com!
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2004 gmc yukon xl, rear ac/heat not coming on AT ALL. not blowing or anything. stopped suddenly, and has not come back on. checked all fuses and relays. no problems with the from ac

I will assume the ac is still getting cold, just not blowing.
You wouldn't really know unless you pulled the panel and checked the lines.
Causes include the blower motor, resistor, fuse, or switch.
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I have a 2003 bmw 325i convertible. I was closing the top and as it neared 80% closed it just stopped. I've tried trying to put it down, up - restarted car; checked truck. nothing help!

I would be checking for failed electrical items such as a separate fuse for the drive mechanism and the relay that controls the motor. Check your owner's manual to locate the correct fuse and relay or possibly the inside of the cover over the the fuse block; the key for each fused circuit should be found there.
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My ac/heater fan stopped blowing, where is the fan located? The air is still cold just not blowing out.

verify the fuse first!! the blower is located behind glove box, see it under it and only need to remove 4 phillips screws!
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89 BMW 325i Relay

I am not to sure but It sounds like you may need to check under the seats for pinched wires if it was on a relay it would probably still work you need to look at the lights on the shift console to see if they light or have power supply first
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A/C Control Relay

There are several relays for the A/C system on these. Using the reverse of the lid of the fuse/relay plate box it will show you the positioning of the relays but not the description;

I've added in the description so hopefully will help you!

Relay 9 - Heater blower relay
Relay 10 - Heated rear window relay
Relay 13 - A/C condenser blower motor relay
Relay 14 - A/C compressor clutch relay
Relay 15 - A/C condenser blower motor relay

There is no relay itself for the A/C control, however there are a couple of fuses for this. If you need I can supply you with the fuse position and exact function within the AC system.

Out of curiousity whats the problem with your AC?

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2001 BMW 330i..Fan for AC/vent not working?

it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.
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