I have a 92 YJ 4 Cyl. Recently the heat will not blow any air out on any speed. I can feel hot air coming through the vents once the car heats up, however again, I can not turn on the heat to blow the hot air into the car. What could be the problem?

does the fan even turn on? if not, maybe blower motor fuse?

keep in mind the heat will not come out the vents, it deactivates the blower. heater motor only works on "heat" or "defrost" setting.