The air flow from my home ac unit is not blowing very hard, there is cold air coming out of the vents but the air isn't blowing enough to cool the house. I've had it set at 75 all day and the house temp hasn't gone below 82. What can this be? I have called for service and unforunately they may not be able to come for 4 days, I live in Phoenix and it's mid - July, this is miserable. I'm hoping some one can suggest to me what it may be so when the tech comes I may have some clue so I don't get taken.

Also, Am I taking a risk by allowing it to continue to run? I don't want it to blow up or anything.