BMW X5 4.4 - NO Heat !

Need assistance in an attempt to determine why I have no heat. Here is what I know thus far:

1) Thermostat is operational as my temperature gauge functions.
2) Climate Control Module functioning and was replaced less than two years ago under certification. I am able to set temp, fan speed and direct air flow but it only blows cool air. A/C is operational.
3) Water pump has been replaced. Drive belt just replaced last week.

I did check into the Final Stage Resistor (FSR) through this forum and learned that if the A/C is operational the FSR may not be the issue.

I would appreciate any advice.

Thank you~