Hello, I have a problem with the air conditioning fan in vw passat b5 130 km. I have already replaced the brushes, I checked the fuses and the relays, everything is ok, the pressure sensor also works. The only thing I can't check is the defender, my question is whether you can bypass the...

On the left side member, underneath, check with a 12V bulb whether it is lit on all pins when the fan will not work, with the engine on and the air conditioning on. You have three pins with 10mm nuts so look for tension.

There you have the resistance from the cabin fan and the radiator fan doesn't work.

hello I am a beginner mechanic where it is and how to check it

I checked this cube, the meter in one is 13.5 volts constant and on the other I have a tremendous voltage, once it is 13.5 vol, 2 vols, then 8 vol and I still jump

I do not know what are you writing about. This is a resistance.

I have a resistance from the lake or something, this is not the resistance that you sent a photo

So it turns out that you write about the supply fan yes? To the cabin.

then maybe write me what turns on the air conditioning fan in gear 1 because they write that it is the lake resident

Which fan, under the hood or in the cabin, WHAT ARE YOU ABOUT ??

Where do you have the hedgehog you write about?

[Solved] Air Conditioning Fan Troubleshooting in VW Passat B5 130 km - Replaced Brushes, Fuses, and Relays

janek ie 13932 16

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#1 16536472 18 Jun 2017 11:04

janek ie janek ie

Level 13

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Post #1
16536472 18 Jun 2017 11:04

Hello, I have a problem with the air conditioning fan in vw passat b5 130 km. I have already replaced the brushes, I checked the fuses and the relays, everything is ok, the pressure sensor also works. The only thing I can't check is the defender, my question is whether you can bypass the resistors to check if the fan turns on in the first gear, because the second gear also switches on ok please help thank you
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#2 16536581 18 Jun 2017 11:51

jdubowski jdubowski

Tube devices specialist

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Post #2
16536581 18 Jun 2017 11:51

janek ie wrote:
The only thing I can't check is the paddler

Ohmmeter is not working?
#3 16536616 18 Jun 2017 12:04

janek ie janek ie

Level 13

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Post #3
16536616 18 Jun 2017 12:04

hello I am a beginner mechanic where it is and how to check it
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#4 16536628 18 Jun 2017 12:08

domex32 domex32

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Post #4
16536628 18 Jun 2017 12:08

On the left side member, underneath, check with a 12V bulb whether it is lit on all pins when the fan will not work, with the engine on and the air conditioning on.

You have three pins with 10mm nuts so look for tension.
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#5 16536640 18 Jun 2017 12:14

janek ie janek ie

Level 13

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Post #5
16536640 18 Jun 2017 12:14

I checked this cube, the meter in one is 13.5 volts constant and on the other I have a tremendous voltage, once it is 13.5 vol, 2 vols, then 8 vol and I still jump
#6 16536651 18 Jun 2017 12:17

domex32 domex32

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Post #6
16536651 18 Jun 2017 12:17

I do not know what are you writing about.

This is a resistance.
#7 16536666 18 Jun 2017 12:21

janek ie janek ie

Level 13

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Post #7
16536666 18 Jun 2017 12:21

I have a resistance from the lake or something, this is not the resistance that you sent a photo
#8 16536678 18 Jun 2017 12:25

domex32 domex32

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Post #8
16536678 18 Jun 2017 12:25

So it turns out that you write about the supply fan yes? To the cabin.
#9 16536690 18 Jun 2017 12:30

janek ie janek ie

Level 13

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Post #9
16536690 18 Jun 2017 12:30

then maybe write me what turns on the air conditioning fan in gear 1 because they write that it is the lake resident
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#10 16536709 18 Jun 2017 12:37

domex32 domex32

VIP Meritorious for electroda.pl

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Post #10
16536709 18 Jun 2017 12:37

janek ie wrote:
then maybe write me what turns on the air conditioning fan in gear 1 because they write that it is the lake resident

Which fan, under the hood or in the cabin, WHAT ARE YOU ABOUT ??
#11 16536714 18 Jun 2017 12:40

janek ie janek ie

Level 13

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Post #11
16536714 18 Jun 2017 12:40

under the small mask
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#12 16536716 18 Jun 2017 12:40

domex32 domex32

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Post #12
16536716 18 Jun 2017 12:40

Where do you have the hedgehog you write about?
#13 16536726 18 Jun 2017 12:45

janek ie janek ie

Level 13

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Post #13
16536726 18 Jun 2017 12:45

in the glove box in the orphanage under the dashboard it is English passat

Added after 2 [minutes]:

and where exactly is this resistance what you pictured
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#14 16536740 18 Jun 2017 12:48

domex32 domex32

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Post #14
16536740 18 Jun 2017 12:48

janek ie wrote:
in the glove box in the orphanage under the dashboard it is English passat

There you have the resistance from the cabin fan and the radiator fan doesn't work.

janek ie wrote:
and where exactly is this resistance what you pictured

domex32 wrote:
On the left side member you have
#15 16536841 18 Jun 2017 13:42

janek ie janek ie

Level 13

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Post #15
16536841 18 Jun 2017 13:42

ok, I found it, what should be the voltage on the outputs

Added after 13 [minutes]:

no 12 volts is 4.6 volts does it mean that the resistor is damaged
#16 17189178 26 Apr 2018 12:05

KierowcaMarcin KierowcaMarcin

Level 8

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Post #16
17189178 26 Apr 2018 12:05

Can anyone write what brushes I should use in the air conditioning fan?

Copper graphite?
Coal?

On the internet, from what people often wrote, they are supposed to be graphite copper, but the master I gave them for replacement says that these are for starters, not devices, where they will work for a long time. I don't see any copper admixtures in the original brushes, which could confirm his words.
#17 17406647 26 Aug 2018 21:47

janek ie janek ie

Level 13

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Post #17
17406647 26 Aug 2018 21:47

hello, like a colleague Domex32 wrote, I replaced the resistance bar underneath the longitudinal member thanks for help
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Topic summary

The discussion revolves around troubleshooting the air conditioning fan in a VW Passat B5. The user has replaced brushes, checked fuses and relays, and confirmed the pressure sensor is functional. They seek advice on bypassing resistors to test the fan's operation in the first gear, as it only activates in the second gear. Responses include suggestions for checking voltage at the fan's connector, identifying the location of resistors, and confirming the type of brushes needed for replacement. The user eventually finds the resistor and seeks clarification on the expected voltage outputs.
Summary generated by the language model.