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Greg, Technician
Category: Audi
Satisfied Customers: 7283
Experience:  Automotive diagnostic tech
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What causes the a/c to stop working in the audi a3

Customer Question

What causes the a/c to stop working in the audi a3
Submitted: 4 years ago.
Category: Audi
Expert:  Greg replied 4 years ago.
The most common issue for the A.C system to stop working is due to the fact you have lost gas within the system ,

The next possibility is due to an electrical wiring issue or a pressure sensor .

There is so much that could cause this ,so the best way to start is to hook up a pressure manifold to the system to check if you have lost gas .

A pressure sensor will see if gas is low and switch off the A/C, so the compressor does not size . or the pressure sensors has malfunctioned .

After fitting the pressure manifold this will let you know if the pressure is done due to a leak in the system ,if the pressure is good then you will have to hook up a diagnostic scan tool to the cars OBD II system and check for A/C malfunction codes.

This is the diagnostic route one should take to see what has malfunctioned .

Need further assistance then please get back to me with the reply box and not the poor or bad service button .

Rgds Greg