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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 Chevrolet Corvette C8?

Replacement of the air conditioning compressor with a new one and mandatory reprogramming of the BCM (Body Control Module). Just replacing the compressor without updating the BCM software may result in a quick return of the fault. TSB 22-NA-041 specifies the procedure.

in Chevrolet Corvette C8 (2020-2022)

Symptoms

No cold air from vents

DTC error codes

Brak

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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

– wczesny 1977

Refrigerant: R12 Amount (g): 1474g Oil: - Oil (ml): - ml

Standard

Refrigerant: R12 Amount (g): 1247g Oil: - Oil (ml): - ml

Standard

Refrigerant: R12 Amount (g): 1020g Oil: - Oil (ml): - ml

See full specification

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