Hi there,
Yesterday we had a very violent and massive rainfall in the Nantes area. After 10 minutes with the wipers at full speed, I realized the windscreen was suddenly very foggy. Then I switched on the AC to full windscreen, which solved the issue, until I decreased the fan speed, but the fan didn't respond. In fact, all the AC system never responded to any action on the control panel, even if I switched it off, it was still blowing air at full speed. Then... I saw that the carpet on passenger side began to be wet !
After switching off the car, the AC fan stopped. I took a look at where the water came from, and there were drops on the plastic panel just under the glove box. Not in the air ducts, just on the corner near the central tunnel.
I inspected on the engine bay side, and found out the famous blocked drain in the scuttle just under the cabin filter. But all the junctions between the scuttle and the bulkhead are totally rust free. Do you think the level of water was so high that water entered the fan's duct ?
After 2 hours waiting in the sun, the AC restarted and was totally fine. I hope the water didn't damaged or corroded any electronic component

I will make further investigation by removing the carpet and cleaning all the scuttle area, and put pictures here
