This post covers most of the components associated with the HVAC system inside the vehicle. Specifically the HVAC box, blower, vents, vent flap solenoids, heater core and Climatic Control. It does not cover how to re-gas or repair/service the AC system.
1. Defective or Noisy HVAC Blower
2. Defective or inoperative vent flaps
3. Climatic Controller Repair
4. Adding HVAC Module 08-HVAC to their VCDS files
5. Location and fitment of the HVAC Drain Pipe
6. OBDII Scan shows No Faults Could be the Heater Core
7. Coolant Flush recommended every 50,000 miles
1. For anyone with a noisy or defective HVAC blower/fan motor, these instructions, and a YouTube video link, will help you remove and/or install it.
www.ttforum.co.uk
2. For defective or inoperative vent flaps this post may be helpful -
www.ttforum.co.uk
3. When the climatic controller is acting up this post describes how to remove it and possibly repair it -
4. How to add the HVAC Module 08-HVAC Auto to their VCDS files, this post is worth a read -
www.ttforum.co.uk
5. Images of the location and fitment of the HVAC drain pipe ca be found here -
6. If an auto scan with an OBDII diagnostic device comes back with no fault codes, it might be an issue with the heater core. This YouTube video from The Humble Mechanic explains what can go wrong and what to look for - Link here.
7. Audi states that coolant is "lifetime" which we all know is nonsense. It's recommended that the coolant be flushed and changed at least every 50,000 miles. While you have it up in the air, be sure to check the coolant lines and sensors for any leaks or unusual signs of corrosion.
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Good overview in this YouTube video from Audi on how the Climate Control functions work on the A3, TT and R8. The TT starts at 2:51 - Link here.
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Pay attention to the following comment from the Workshop Manual, HVAC, Heating Ventilation & Air Conditioning - RG 80 87 - D3E80068107. You can download the workshop manual here.
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1. Defective or Noisy HVAC Blower
2. Defective or inoperative vent flaps
3. Climatic Controller Repair
4. Adding HVAC Module 08-HVAC to their VCDS files
5. Location and fitment of the HVAC Drain Pipe
6. OBDII Scan shows No Faults Could be the Heater Core
7. Coolant Flush recommended every 50,000 miles
1. For anyone with a noisy or defective HVAC blower/fan motor, these instructions, and a YouTube video link, will help you remove and/or install it.
Removing the HVAC Blower Fan Motor
For anyone with a noisy or defective fan, these instructions and YouTube videos will help you remove it from the HVAC system. If controls work and the fan speed still works, but the fan is noisy, it could be something ended up inside the fan itself as seen in this YouTube on a 2014 Jetta...
www.ttforum.co.uk
2. For defective or inoperative vent flaps this post may be helpful -
DIY Fix for HVAC Flap Actuators
The post below is from one of our sister Forums (link here) and discusses the problem and solution to a bad V158 Temperature Flap Control Motor. If you run a fault scan and find any similar faults for the other flap servo motors in the HVAC unit this DIY may work as a possible solution. For...
www.ttforum.co.uk
3. When the climatic controller is acting up this post describes how to remove it and possibly repair it -
4. How to add the HVAC Module 08-HVAC Auto to their VCDS files, this post is worth a read -
VCDS Users - Please Read - HVAC Label File
If you connect to VCDS select the engine module, go to Measuring Blocks, select block 001 and hit go. The display shows four live data values. The text under each block tells you what the data is (Block 1, value 1 says 'Engine Speed'). If you hover the cursor over the live data, a balloon...
www.ttforum.co.uk
5. Images of the location and fitment of the HVAC drain pipe ca be found here -
6. If an auto scan with an OBDII diagnostic device comes back with no fault codes, it might be an issue with the heater core. This YouTube video from The Humble Mechanic explains what can go wrong and what to look for - Link here.
7. Audi states that coolant is "lifetime" which we all know is nonsense. It's recommended that the coolant be flushed and changed at least every 50,000 miles. While you have it up in the air, be sure to check the coolant lines and sensors for any leaks or unusual signs of corrosion.
Good overview in this YouTube video from Audi on how the Climate Control functions work on the A3, TT and R8. The TT starts at 2:51 - Link here.
Pay attention to the following comment from the Workshop Manual, HVAC, Heating Ventilation & Air Conditioning - RG 80 87 - D3E80068107. You can download the workshop manual here.
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