High Priority 100% confidence

Air conditioning stopped cooling / no response to AC button

Q: How to fix Air conditioning stopped cooling / no response to AC button in BMW 330e (G20)?

The repair solution requires a powerful repair kit: flushing the AC system with a machine and simultaneously replacing the electric compressor, water condenser, pressure pipe and electronic expansion valves and shut-off valves. Manufacturing defect with a large repair scale, codified in the bulletin (SIB 64 09 21).

in BMW 330e (G20) (2019-2030)

Symptoms

Air conditioning does not turn on

DTC error codes

High-voltage A/C system component faults

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

Refrigerant specifications for this model are available in the catalog.

Open refrigerant database

Have this problem?

Generate a personalized AI report for your BMW 330e (G20) or book a workshop visit.

Generate AI report Schedule visit