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No cooling (total) and errors / Flashing air conditioning panel (Climatronic)

Q: What are the symptoms of No cooling (total) and errors / Flashing air conditioning panel (Climatronic) in Audi A8 L 4.2L?

No cold air from vents. A/C does not react to control panel settings

Q: How to fix No cooling (total) and errors / Flashing air conditioning panel (Climatronic) in Audi A8 L 4.2L?

Cleaning the rust, replacing damaged pins of the 14-pin connector and checking the insulation/replacing the valve if it is leaking fluid.

in Audi A8 L 4.2L (2008-2008)

Symptoms

No cold air from vents
A/C does not react to control panel settings

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Technical diagnosis (Premium)

Recognized technical fault:

Auxiliary controller voltage instability detected

Technical analysis

Detailed analysis of HVAC controller operation parameters, CAN bus data readings, and diagnostic signal waveforms. Purchase PRO access or log in to read the full fault analysis.

Confirmed solution

Complete step-by-step repair procedure including module non-volatile memory reset, sensor calibration, and correct wiring routing. Unlock the full report to see the instruction.

Parts needed

Filters ferrite anti-interference / noise suppressor
Auxiliary starting battery (depending on cell status)

Workshop hacks

Important workshop tips for mechanics regarding bypasses without expensive control module replacement and manufacturer software service bulletins.

TSB / TPI service bulletins

TSB-24-HVAC-01TPI-2068943/2

A/C Technical Specifications

(4H) Hybrid

Refrigerant: R134a Amount (g): 1080g Oil: G 052 535 M2 PAO 68 AA1 Oil (ml): 180ml

(4H)

Refrigerant: R134a Amount (g): 780g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 130ml

(4H) silnik: 8-cylindrowy TDI

Refrigerant: R134a Amount (g): 740g Oil: PAG PAO 68 lub PAG ISO 46 Oil (ml): 180ml

See full specification

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