Hello all,

I have a 1998 ML320 SUV. When I am operating the air conditioner it will intermittently and suddenly stop blowing cold air and begin blowing hot air. This air is very hot, not ambient outside temperature. It feels like the air conditioner suddenly moved from cold to the hottest setting of the heater.

There is no leak in the Freon system and the Freon levels are high. My Mercedes dealership seems to be at a loss to fix the problem. They have noted it blowing hot air, but have been unable to determine what is causing the problem.

Any Suggestions for why the AC is doing this?

Thanks