a/c error

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lucky - 29 Mar 2005 08:59 GMT

Hi,

I have v70 12'99 with 2,5TDI engine. After starting engine two orange lights
(a/c OFF button and "recilculation" button) are blinking for a while. I read
in manual that shows an error in A/C. What can be wrong? Can I check this
alone or should I to dealer?

Piotr

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Mike F - 30 Mar 2005 15:12 GMT

> Hi,
>
[quoted text clipped - 6 lines]
>
> --

This means there's a fault in the system. Someone with the correct
electronic reader can tell you what part the error code will point you
to. Often it's the heater motor - the ECU monitors the current used per
applied voltage, and turns the motor off if the value is too high to
protect the control circuit.

However you could start by cleaning the dust out of the temperature
sensor grille on the dash between the rocker switches and temperature
control. That at least won't cost anything, it may fix the problem, and
the dust probably need to be cleaned out anyway.

Signature

Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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vinran1@bellsouth.net - 13 Apr 2005 13:47 GMT

I would concur with that, try something simple that may fix it before
plunging at the dealer.

A couple of days ago I was messing with the interior dome lamp on my
recently aquired 89 780, could not get the dome lamp to come on.

When I removed the whole assembly and noticed there was corrosion on
all the contacts, I removed the whole thing and resolved to later
clean it up and retest.

Immediately upon starting the vehicle (with the whoes lamp assembly
disconnected) I noticed the a/c compressor lamp and recirculate switch
blinking.

retracing my steps, I found the temp sensor in the dome lamp assy.

Of course once I plugged the whole thing back in, all was fine.

I didn't even know the sensor was there, but learned a good lesson for
the future.

So the little things can make a BIG difference.

Not sure about your model, but if the temp sensor is on the dash, that
would be a great place to start, probably get a lot more dust on it in
that location.

>> Hi,
>>
[quoted text clipped - 17 lines]
>control. That at least won't cost anything, it may fix the problem, and
>the dust probably need to be cleaned out anyway.

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