Heating that barely warms after a loud “plop”: cracked air-conditioning compressor line (EQA and EQB)

Engine / equipment

Mercedes EQA (H243) and EQB (X243) electric

Period mentioned

2022–2023

Symptoms

The heating gives little heat (and the air conditioning cools poorly); the driver often remembers a single loud “plop” during a journey. B19A200 (electric compressor overtemperature) or P053400 (refrigerant level too low) may be stored.

Possible cause described

Mercedes-Benz bulletin LI83.20-P-076623 (June 2023) describes the hot-gas line between the compressor and the condenser cracked. If there are also particles in the dryer cartridge filter, the circuit is flushed and the compressor (with the new part number), that line and the complete condenser are replaced. The cause was still being analysed.

Check for the garage

The garage reads the climate-control codes, looks at the line between compressor and condenser and checks the dryer cartridge filter. According to the bulletin, a noisy compressor alone is no reason to replace it: it has to match the codes or the particles.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database