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Eric, Automotive Repair Shop Manager
Category: VW
Satisfied Customers: 31935
Experience:  Automotive Repair Shop Manager, Technician
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Is someone there, 2007 Jetta, Had AC compressor replaced

Customer Question

Is someone there
JA: What is the model/year of your VW?
Customer: 2007 Jetta
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Had AC compressor replaced along with drier and expansion . Flushed the system . Can't get power to the system. Took it to a VW mechanic and they said I am missing a ambient air sensor. That shouldn't effect the compressor kicking on right?
JA: Which particular sensor are you asking about? And have any trouble codes been triggered?
Customer: No
JA: Anything else you think the mechanic should know?
Customer: The VW tech said he was getting power to the compressor. We want and rechecked and it's not . Also it is holding pressure on low and high side.
Submitted: 11 months ago.
Category: VW
Expert:  Eric replied 11 months ago.


The ambient temperature sensor signal is used in commanding the compressor on and off. If temperature gets below 55 degrees outside, it will turn the compressor off. If the sensor is missing, then no signal from it, which will keep the compressor from being commanded on.

This is assuming that yours came from the factory with an ambient sensor. If it did not, then we will be looking elsewhere - faulty pressure sensor, no signal from the climate control panel, short in wiring, faulty ecm

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