It's my turn... left and rear left vents hot, right side cold
It's a 80F outside, AC on, the center vents and the right side cold, but heat comes out on the left side. Checked the rear, left side hot and right side cold.
Searched the webs and none has real fix answers. I think it's time for me to read and fix this problem. Did try all settings, auto, center vents, up/down, floor, nothing changed. If anyone found a fix somewhere, please direct me. Cheers, Louis |
This is usually a symptom of a slightly low refrigerant charge. Get out your manifold gauges and check the pressure relevant to ambient temperature.
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That's great Mr. Bally, I'll do that first.
Thanks, Louis |
And swallow your pride and plug VCDS in. See if there are any stuck flap codes or other hvac error codes that would otherwise take you an age to figure out. |
"Yes Dave..." I'll run the scan to see what VCDS can do for my $350.:)
Cheers, Louis |
Originally Posted by Mister Bally
(Post 25132179)
This is usually a symptom of a slightly low refrigerant charge. Get out your manifold gauges and check the pressure relevant to ambient temperature.
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Originally Posted by TSHong
(Post 25132293)
+1, classic symptom.
For $100 down my local Goodyear, with a full refund warranty/no charge if they find a leak, it’s a no brainer to get it done properly. Half assing it with cans of refrigerant risks over charging it, which at best will not fix it fully, at worst will blow the compressor. |
https://cimg6.ibsrv.net/gimg/www.aud...3cf5f86806.jpg
No air out https://cimg9.ibsrv.net/gimg/www.aud...146a78328f.jpg full blast ac on set to lo https://cimg7.ibsrv.net/gimg/www.aud...45fcdbc60a.jpg engine OFF https://cimg8.ibsrv.net/gimg/www.aud...d9eace9c44.jpg Left vent low air Hello all, Thanks for all the tips, this morning came out, the amazing thing is when I set temp to "lo" the ice-cold air came out every vent, except left pillar vent and the left rear center vent (low air), the right are full blown. So, if I set the temp @60-70, the left front vent is warm, the rear foot also warm. Here are the pictures of the AC manifold. I'll have the full video after taking the family shopping. Ran VCDS per DAVE and OBDEleven, nothing showed up in AC. 00-Steering Angle Sensor -- Status: OK 0000 01-Engine -- Status: OK 0000 02-Auto Trans -- Status: OK 0000 03-ABS Brakes -- Status: OK 0000 05-Acc/Start Auth. -- Status: OK 0000 06-Seat Mem. Pass -- Status: OK 0000 07-Control Head -- Status: OK 0000 08-Auto HVAC -- Status: OK 0000 09-Cent. Elect. -- Status: OK 0000 0E-Media Player 1 -- Status: OK 0000 14-Susp. Elect. -- Status: Cannot be reached 1100 15-Airbags -- Status: OK 0000 16-Steering wheel -- Status: OK 0000 17-Instruments -- Status: OK 0000 19-CAN Gateway -- Status: Malfunction 0010 34-Level Control -- Status: Not registered 0001 36-Seat Mem. Drvr -- Status: OK 0000 37-Navigation -- Status: Malfunction 0010 38-Roof Electronics -- Status: OK 0000 42-Door Elect, Driver -- Status: OK 0000 46-Central Conv. -- Status: OK 0000 47-Sound System -- Status: OK 0000 4F-Centr. Electr. II -- Status: Malfunction 0010 52-Door Elect, Pass. -- Status: OK 0000 53-Parking Brake -- Status: Malfunction 0010 55-Xenon Range -- Status: OK 0000 56-Radio -- Status: OK 0000 57-TV Tuner -- Status: Malfunction 0010 61-Battery Regul. -- Status: OK 0000 62-Door, Rear Left -- Status: OK 0000 65-Tire Pressure -- Status: OK 0000 67-Voice Control -- Status: OK 0000 6C-Back-up Cam. -- Status: Malfunction 0010 6D-Trunk Elect. -- Status: Cannot be reached 1100 72-Door, Rear Right -- Status: OK 0000 76-Park Assist -- Status: OK 0000 77-Telephone -- Status: OK 0000 |
Next step is to run a VCDS output test on the hvac. No airflow out of some vents certainly suggests a stuck/broken flap somewhere. Of course if something’s physically broken (such as a flap hinge), then vcds may not show an error as the actuator motor is working as expected. Just it’s not actually moving the flap. You might hear some clicks/grinding noises though which will be the feedback you need to investigate further. |
"Yes Dave..." but I'll never use VCDS to program anything besides open and close rear eBrake. I think I've just discovered something about the hvac... sometimes the vents flap potentiometers are stuck (like Dave suggested), we can exercise the range by set to hi full blast, then lo, the range had been exercised and everything works.
After my daughter and son sat in the back seat, after a few minutes, all vents were cold and air come out as normal. I set it back to 62F and still as cold as ice and the outside is 77 What if the hvac senses the passengers and turn on the vents. Everything is working perfectly now. Cheers, Louis |
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