A4 AC clutch

[Vincent Gelinas]

A problem I've had with my AC before is that the ambient temp switch was 
faulty, making it think that it was too cold for the AC to safely run 
(before the pax oil had come up to temp, etc.)

On 6/12/2012 15:22, Joshua Van Tol wrote:
> Marco,
>
> Those switches are usually overtemp switches. The pressure switch is
> usually located elsewhere, often on the accumulator (in an orifice tube
> system) or on the suction line in an expansion valve system.
>
>
> On Tue, Jun 12, 2012 at 1:37 PM, Marco Weibel<wemaca at gmail.com>  wrote:
>
>> You want to make sure that the system is pressurized or the pump doesn't
>> engage ?
>> Some pumps have a built in safety switch that prevent dry running/too low
>> pressure even tho the wiring gives juice to the pump.
>>
>> Marco Weibel
>>
>> Sent from my iPhone
>>
>> On 2012-06-12, at 12:46 AM, "Ed Kellock"<ed.kellock at gmail.com>  wrote:
>>
>>> I worked on my boss' 2000 A4 Avant (250k+ miles) AC tonight and believe I
>>> isolated the problem to the ac clutch, but apparently it is not available
>>> separately.
>>>
>>> When it should have been running and wasn't, there was 12 volts to the
>>> trigger wire.
>>>
>>> With the engine off, I was able to rotate the ac compressor and it felt
>>> smooth.
>>>
>>> I thought I could just replace the ac clutch, but that does not seem to
>> be
>>> the case.
>>>
>>> If either my diagnosis is poor or anyone knows where I can get just the
>>> clutch, please chime in.
>>>
>>> The ac clutch part# according to ETKA is 8d0260811a
>>>
>>> Thanks!
>>>
>>> Ed
>>>
>>>
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