2022-2026 Audi A3 AC Not Working TSB

Symptoms of Air Conditioning Issues

Owners of 2022-2026 Audi A3 (Type 8Y*) vehicles may experience problems with their air conditioning system. The primary complaint is that the "87 Air conditioning not working" or is providing insufficient cooling. This can manifest as the "climate control -> heating, cooling -> climate control unit cooling output functionality -> irregular" or even "climate control -> heating, cooling -> climate control unit cooling output functionality -> no function", leading to discomfort in the cabin. If you are experiencing an "Audi A3 air conditioning not working" issue, this TSB may apply to your vehicle.

Diagnosis and Root Cause

When diagnosing the issue of the "Audi A3 air conditioning not working", workshops have found that the complaint is reproducible. The root cause is typically an insufficient amount of refrigerant in the air conditioning system. This loss of refrigerant is attributed to a leak detected at the refrigerant line, specifically part number 5WB 816 738 C, where it connects to the expansion valve. Audi's technical background indicates a deviation in the dimensions on the refrigerant line to expansion valve connection as the underlying cause.

Important Warnings

Audi Technical Service Bulletin 2079244/1 includes critical information for technicians and owners:

• Applicability: "Important: this TSB only applies to the refrigerant line with part number 5WB 816 738 C."
• Repair Integrity: "If the expansion valve is not renewed at this time, the O-ring may not fully seal at the affected areas."

Repair Procedure Summary

For vehicles experiencing the symptoms described in TSB 2079244/1, the repair procedure involves addressing the refrigerant leak. If a leak is confirmed at the refrigerant line (part number 5WB 816 738 C) on the expansion valve, the refrigerant line and its associated seals must be renewed. Technicians should refer to Figure 1 in the TSB for visual guidance on the leak location.

After removing the refrigerant line, it is crucial to inspect the connection at the expansion valve for any dirt or impurities, as shown in Figure 2. If such impurities are found, the expansion valve in the affected vehicle must also be renewed in addition to the refrigerant line to ensure a proper seal and prevent future leaks. Failure to replace a contaminated expansion valve could lead to the O-ring not sealing correctly.

Warranty Information

Warranty claims for this repair should be submitted according to the Audi Warranty Policies and Procedures Manual. Claims are subject to review and audit by Audi Warranty. If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.

Here are the specific codes for warranty claims:

• Service Number: 8744
• Damage Code: 0050
• Claim Comment: As per TSB 2079244/1

Labor Operations:

• Remove and install condenser/evaporator line: 8744 19xx (Refer to SRT for associated operations)
• Remove and install inner heat exchanger: 8761 19xx (Refer to SRT for associated operations)
• Check expansion valve: 8770 0199 (10 TU)
• Remove and install expansion valve: 8770 1999 (10 TU)
• GFF / Guided Functions: 0150 0060 (Labor according to the diagnostic log)

NHTSA ID: 11023808