What are the symptoms of Blower vents emit warm air when A/C is turned on in Audi RS3 (2017-2019)?

Air conditioning does not turn on

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Blower vents emit warm air when A/C is turned on

Q: How to fix Blower vents emit warm air when A/C is turned on in Audi RS3 (2017-2019)?

Replacing the punctured hose with a new one and re-routing the cable with a large distance from the belts and rollers. Repair covered by TSB 2042340/5. After replacement, always take a photo of the hose route. Minimum 2cm distance from all rotating elements.

in Audi RS3 (2017-2019) (2017-2019)

Symptoms

Air conditioning does not turn on

DTC error codes

G395 brak refrigerant

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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

3 z silnikiem 5-cylindrowym

Refrigerant: R134a Amount (g): 500g Oil: PAG PAG 46 lub PAO 68 b.d. RS Oil (ml): b.d.ml

5 kompresor Denso 7SEU17

Refrigerant: R134a Amount (g): 570g Oil: PAG PAG 46 lub PAO 68 Oil (ml): 150ml

See full specification

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