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Air conditioning stopped cooling / no response to AC button

Q: What are the symptoms of Air conditioning stopped cooling / no response to AC button in Volkswagen Bora?

Problem appears while driving. Air conditioning does not turn on. Problem after collision or accident

Q: How to fix Air conditioning stopped cooling / no response to AC button in Volkswagen Bora?

Replacing the melted fuse box on the battery and making new cable ends. Open the hood, look at the black box on the battery. If the plastic next to the metal plates (fuses) is melted, you have the reason for the lack of air conditioning. A classic in PQ34.

in Volkswagen Bora (1997-2005)

Symptoms

Problem appears while driving
Air conditioning does not turn on
Problem after collision or accident

DTC error codes

High pressure cutoff

Verifying license...

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

Standard

Refrigerant: R134a Amount (g): 775g Oil: G 052 154 A2 PAO 68 lub PAG ISO 46 Oil (ml): 135ml

Standard

Refrigerant: R134a Amount (g): 775g Oil: - Oil (ml): - ml

See full specification

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