Recently, my air con. (or heat) will stop blowing in the front, but continue blowing in the back. Minutes later - and for no intervening reason - it will start blowing again in the front, accompanied by a slight whirring noise from the general area of the glove compartment. Guesses?

 

Dying fan motor.

 

It could be also caused by a dirty condenser/evaporator.

 

CX-9 by chance? Old style blower motor relay maybe?

 

sounds like a blower motor, check for water leaks into the blower assembly

 

It was the relay Thanks