2007 XC90 V8 HVAC-Car not cooling enough- fan problem

[Mritter]

Hello fellow Volvo owners...
I recently purchased a V8 XC90 2007. I love this vehicle!!!
I am having HVAC problems. The a/c is not cooling the car down and the fan is not blowing hard enough. Recently, the fan started slowing down and going faster. Right now, the fan is not running at all. I had the compressor replaced two months ago. I am wondering what else it could be. After reading on the internet, I have a few ideas but I don't know how to investigate and/or replace the parts.

(1). Perhaps the outside air flap not closing. When the system is in Max A/C, the flap should be closed. Unless the flap is closed, hot outside air dilutes the effect of A/C, producing slow cool down.
DOES ANYBODY KNOW HOW TO TEST THE FLAP? AND WHERE I CAN FIND IT?

(2). Is the temperature (blend-air) door operating correctly? If the temperature door isn’t in the Max Cool position, the heater core may contribute enough heat to slow down the cooling. Even if there is a heater coolant control valve and it’s fully closed, a temperature door even just partly in the wrong position can slow down the cooling by redirecting some of the airflow through the heater.
DOES ANYBODY KNOW HOW TO TEST TO SEE IF THIS IS THE PROBLEM? WHERE IS THE TEMPERATURE DOOR LOCATED?

(3.)In terms of the fan not running...I know it could be the heater blower motor resistor or the blower motor itself?? Any ideas???
DOES ANYBODY KNOW WHERE TO FIND THE HEATER BLOWER MOTOR RESISTOR?? HOW DOES ONE TEST TO SEE IF THIS IS THE PROBLEM??