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Problem with my ventilation system 900 1991

I have a 1991 940 SE which has a ACC climate controller. When I turn on the blower fan, I hear it running but there is no air coming out of the various discharge ports. I checked and replaced the two check valves in the engine
compartment but it did not help. The AC system was recently converted to R-134a with new a compressor and a new blower fan was installed. I can't find anything on the 900 FAQ regarding this specific problem.

I'm not sure if this is a symptom of the above problem but I had the heater control valve go out recently causing coolant leakage through out the engine compartment. The valve was replace...

Can someone shed some light on this problem.

Thanks.






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