Climate Control Unit Question
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1st Gear
Joined: Jun 2021
Posts: 4
Climate Control Unit Question
Firstly, I have a 2005.5 Audi A4 B7 6-Speed with 185k miles
I have a question about the CC unit, and if it may be the cause to my AC not working.
I've been having A/C issues since last fall, and decided to tackle the job and figure it out this week. After some diagnosis, and testing the A/C fan with a battery, I realized that the A/C fan was indeed shot. Wouldn't turn. So I figured that was my issue, and after replacing it, it would be all good. Ordered a whole new fan assembly, replaced both fans. Also replaced the Fan Control Module, since I've heard they can be the issue as well. Once I finished I tried my AC and nothing. At first the A/C fan didn't even kick on... wtf. Then the next time I tried it did kick on, but still no A/C. System is completely charged, and the pressure switch was replaced a couple years ago. Then the next day the fan wont come on again, and I haven't gotten it to run since.
So I decided to check polarity on every single fuse in the fuse box, as well as the ECU box. All are good. Next step was to see if I was getting 12v from the FCM to the wires going to the A/C fan.... nothing, no voltage while car is running and temp on low, full blast fans. ECON light off. Next I wanted to check if the compressor was getting voltage. Nope. That's not getting voltage either.
So i thought, maybe its my CC unit? Maybe when i try to turn on the A/C it doesn't actually send the signal out to turn on the A/C, sending 12v to fan/compressor. So I ordered a used one from Ebay and will get it later this week.
Does this make sense for me to think this could be the CC unit? I really don't get what else it could be. Is there some hidden relay I don't know about?
I have a question about the CC unit, and if it may be the cause to my AC not working.
I've been having A/C issues since last fall, and decided to tackle the job and figure it out this week. After some diagnosis, and testing the A/C fan with a battery, I realized that the A/C fan was indeed shot. Wouldn't turn. So I figured that was my issue, and after replacing it, it would be all good. Ordered a whole new fan assembly, replaced both fans. Also replaced the Fan Control Module, since I've heard they can be the issue as well. Once I finished I tried my AC and nothing. At first the A/C fan didn't even kick on... wtf. Then the next time I tried it did kick on, but still no A/C. System is completely charged, and the pressure switch was replaced a couple years ago. Then the next day the fan wont come on again, and I haven't gotten it to run since.
So I decided to check polarity on every single fuse in the fuse box, as well as the ECU box. All are good. Next step was to see if I was getting 12v from the FCM to the wires going to the A/C fan.... nothing, no voltage while car is running and temp on low, full blast fans. ECON light off. Next I wanted to check if the compressor was getting voltage. Nope. That's not getting voltage either.
So i thought, maybe its my CC unit? Maybe when i try to turn on the A/C it doesn't actually send the signal out to turn on the A/C, sending 12v to fan/compressor. So I ordered a used one from Ebay and will get it later this week.
Does this make sense for me to think this could be the CC unit? I really don't get what else it could be. Is there some hidden relay I don't know about?
1st Gear
Joined: Aug 2021
Posts: 9
Most likely it is a CC unit, check it out. The issue of climate control is quite responsible and important both in terms of the car and in general for our whole world. Recently, I have been thinking a lot about climate change in our world and on the site https://artscolumbia.org/free-essays/climate-change/ I have read some rather constructive and useful studies about global problems that affect the modern world, about climate change and its impact on society as a whole.
Last edited by Holden Butler; Oct 29, 2021 at 02:33 AM.
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