Air conditioning failure and “charge batterie DC impossible” after a fast charge (2022 Mégane E-Tech Electric)

Engine / equipment

Renault Mégane E-Tech Electric without heat pump, early cars

Period mentioned

2022

Symptoms

After a DC fast charge, almost always after a long motorway trip in hot weather, the air conditioning stops cooling, a seizing noise is heard and the instrument panel may show “Anomalie batterie de traction” (traction battery fault) or “charge batterie DC impossible” (DC charging impossible).

Possible cause described

According to L'argus (August 2022), with the battery at 40–45 °C and some delay between plugging in and charging starting, a valve linking the battery cooling circuit with the air-conditioning circuit stays in its rest position: the compressor runs empty without lubrication and is damaged, sometimes beyond repair (metal filings in the pipes). It affects cars without a heat pump (about 2,000 cars); Renault prepared an over-the-air update for September 2022.

Check for the garage

Check that the car has Renault's software update installed. If the air no longer cools after a fast charge, the garage checks the compressor and looks for metal filings in the pipes. Until the update was installed, Renault advised keeping the air conditioning on during fast charges.

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