What are the symptoms of Air conditioning stopped cooling / no response to AC button in BMW 330e?

Irregular A/C operation. No blowing from vents. Dark sludge or metal shavings in system. Air conditioning does not turn on

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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?

Often the value of the car (replacement of the compressor, all condensers/evaporators) PLUS dropping the batteries several times, and machines flushing the battery circuit on a separate circuit. When a BMW i3 drives up and you hear at least a small whistling and squealing sound from the electric pump on the left rear, pull out the cable immediately. If it falls into the circuit before the customer is aware, no one will take it to repair it.

in BMW 330e (2014-2018)

Symptoms

Irregular A/C operation
No blowing from vents
Dark sludge or metal shavings in system
Air conditioning does not turn on

DTC error codes

No HV cooling

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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

Refrigerant specifications for this model are available in the catalog.

Open refrigerant database

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