Volvo Repair: heater, climate control unit, model volvo

Question
QUESTION: when the heat in the car is on you can feel heat so I suppose it works. However, no heat blows out does the climate control unit control that issue, or it's it the fan blower motor is bad.

ANSWER: Michael, On what year and Model Volvo?  Roger

---------- FOLLOW-UP ----------

QUESTION: volvo 850gls 1993

Answer
Michael, Its most likely the blower resistor and motor.  Most times the blower motor seizes but on the 93's the control head itself usually is the culprit.  You can check the blower by removing it and applying power to it.  If it spins freely, then its okay.  If you take it out and its hard to turn then its a bad motor.  The first thing to do is check out the motor, then we can go further.  Roger