BMW Repair: e34 ac, cold air blows, e34 m50

Question
hi

it blows warm air which i think its outside air.
i live in nigeria which is a warm country
thanks
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Followup To
Question -
Hi Bruno,

I drive a 1991 e34 M50.

When i put on the AC on the climat control, the cold air blows from the passenger site and the side vents and even the back but it doesnt blow on the drivers side.

Please wat could be the cause and how can this be rectified.

Thanks.

Answer -
Does it not blow air or blows warm air?

Answer
I believe that you have a dual heater control vale under the hood. One side is for passenger side and one for drivers.If one side sticks you either get no heat or no ac.Try pinching off the heater water hose and see if the drivers side starts cooling.