Heat worked fine and just all at once won't blow at all,what could it be just to

Hello, if the blower is not blowing any air at all, it can be caused by one of several areas of concern. First, the blower motor itself may have failed. Or, wiring and the connector to the motor is suspect. The blower motor relay or a system fuse could be faulty, related to other possible causes. The blower motor resistor or control switch could be of concern. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops