Why won't my AC take a charge? is it an electrical issue?
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.
Could be you have air in the refrigerant system, debris clogging the orifice tube, or a saturated accumulator. HTH. -Jim
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..
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
You're welcome. Glad to help. Thank you for the best answer click. Yes, please let us know what you find out. -Jim
Looking for a Used Q7 in your area?
CarGurus has 4,284 nationwide Q7 listings starting at $7,500.
Search Audi Q7 Questions
Audi Q7 Experts