For what it's worth, the control panel for the heater / climate control on the dash of my Qashqai had to be replaced under warranty as it wasn't working properly. doesn't sound like the same symptoms but might be the same ailment. In my case it randomly selected the directions of airflow, fan speed and temperatures and wouldn't allow a manual over-ride. That all started happening about this time last year in the really cold spell so wasn't really funny on long runs. New control panel fixed it.
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