Why won't my AC take a charge? is it an electrical issue?


Asked by Jul 23, 2016 at 04:40 PM about the 2007 Audi Q7

Question type: Maintenance & Repair

Condenser & Blower Motor works fine

5 Answers


Is static pressure in the ballpark? This can be measured with a manometer set or the high pressure transducer with a duty cycle capable digital multimeter. If the pressure is low, locate the leak first. Leaks will be oily deposits. Once located, collect parts: replacement seals, and receiver/drier. Then, take the car to an A/C shop and have them recover the refrigerant for you. Repair the system and apply vacuum: overkill (several hours), or use a manometer that can read in the micron range to determine the correct evacuation. Ideally, leave vacuum intact for a day or two and check for a pressure rise.

1 of 1 people found this helpful.

Could be you have air in the refrigerant system, debris clogging the orifice tube, or a saturated accumulator. HTH. -Jim

1 of 1 people found this helpful.
Best Answer Mark helpful

Pay $85-100 and have it evacuated, checked for leaks 30mm of vacuum ...and filled with the correct oil PAG,# and amount. Then filled to the correct weight ONLY proper way, of refrigerant 134A. That's what I suggest..

1 of 1 people found this helpful.

Thanks guys..I'lll take it to the dealership and have it done the right way. Took it to a couple of shops to charge the system, and both told me it's an electrical short that needs to be found. Dealer's cost is $109, a lot less than I expected. I'll follow up and let you guys know the results

1 of 1 people found this helpful.

You're welcome. Glad to help. Thank you for the best answer click. Yes, please let us know what you find out. -Jim

Your Answer


Looking for a Used Q7 in your area?

CarGurus has 6,112 nationwide Q7 listings starting at $6,495.


Audi Q7 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used BMW X5
311 Great Deals out of 17,112 listings starting at $2,991
Used Acura MDX
280 Great Deals out of 13,844 listings starting at $795
Used Mercedes-Benz GL-Class
145 Great Deals out of 3,609 listings starting at $6,900
Used Porsche Cayenne
129 Great Deals out of 6,030 listings starting at $4,495
Used Volvo XC90
108 Great Deals out of 10,454 listings starting at $2,299
Used Land Rover Range Rover Sport
111 Great Deals out of 6,600 listings starting at $5,995
Used Audi A8
40 Great Deals out of 1,440 listings starting at $3,499
Used Land Rover Range Rover
85 Great Deals out of 4,644 listings starting at $2,850
Used Audi A6
129 Great Deals out of 7,705 listings starting at $2,200
Used Jeep Grand Cherokee
803 Great Deals out of 73,495 listings starting at $500
Used Chevrolet Tahoe
626 Great Deals out of 37,207 listings starting at $795
Used BMW X6
30 Great Deals out of 2,217 listings starting at $13,500
Used Cadillac Escalade
254 Great Deals out of 11,929 listings starting at $2,995

Used Cars For Sale

2018 Audi Q7 For Sale
4 Great Deals out of 3,074 listings starting at $47,416
2017 Audi Q7 For Sale
3 Great Deals out of 476 listings starting at $39,980
2015 Audi Q7 For Sale
38 Great Deals out of 963 listings starting at $24,995
2014 Audi Q7 For Sale
35 Great Deals out of 567 listings starting at $19,655
2013 Audi Q7 For Sale
13 Great Deals out of 349 listings starting at $13,985

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.