AIRCON COMPRESSOR

[B5 BIKER]

hi all,
i had to replace the aircon compressor last night, as the old one was fubar!!
got a second hand one that seems fine and fitted it with no problem.
i know all the gas is gone from the system, but the fan blower unit is not 'blowing' now.
is this because the system is de-pressurised (getting it re-gassed on friday)
the fan speed indication on the display is scrolling up and down itself but nothing happening.
thanks

 

[ScottD3]

You mean the internal fan not the AC fan on the radiator?

The internal fan is not effected by the AC compressor.

The internal fan suffers from the brushes wearing out and the fan failing to work.
If you checked all fuses, I'd remove the glove box and check there is power going to the fan.
There is two cables going to the fan, if there is then I'd suspect its the brushes.


http://www.audi-sport.net/vb/a4-s4-forum-b5-chassis/117912-how-replace-blower-brushes.html

 

[B5 BIKER]

yes its the internal fan i'm on about.
was dark when i finished last night so didnt get to check the fuses.
all was working 100% before the change over of the compressor, hard to see the brushes failing in the space of couple of hours while the car wasnt even running.

 

[aragorn]

My car doesnt even have an AC compressor, it broke and i removed it and chucked it in the bin.

Fan works fine.

Completely unrelated systems!

 

[ScottD3]

yes its the internal fan i'm on about.
was dark when i finished last night so didnt get to check the fuses.
all was working 100% before the change over of the compressor, hard to see the brushes failing in the space of couple of hours while the car wasnt even running.

Mine failed randomly on the way to work.
It would randomly start/stop and eventually failed.

My car doesnt even have an AC compressor, it broke and i removed it and chucked it in the bin.

Fan works fine.

Completely unrelated systems!

Same thing with mine.
I got one now but never had one before.

 

[B5 BIKER]

i understand that they are two different systems, but both controlled from the one control unit.
but just finding it hard to understand why the fan stopped working as soon as i fitted a new compressor.
could it be that big of a coincidence ???

 

[ScottD3]

i understand that they are two different systems, but both controlled from the one control unit.
but just finding it hard to understand why the fan stopped working as soon as i fitted a new compressor.
could it be that big of a coincidence ???

Yup.
I'm going to go with that.

 

[aragorn]

Well unless you've blown a fuse somehow when changing the compressor, i cant see it being anything other than a coincidence?

 

[B5 BIKER]

ok, fair enough.
will have to do a bit mor homework tonight so
thanks,

 

[B5 BIKER]

ok, fan is working.
fuse was gone, semmingly the air con cmpressor and the blower fan share the same fuse.
cant understand how it blew though on a fully insulated connection
ahh well !!
thanks