The heat is coming out but the fan isn't blowing at all. Fuse isn't blown. Another reason it wouldn't be working? It's a dodge ram 2003, 1500, 4x4

. Check all under hood and under dash fuses with a test light or multimeter.

. Check heater blower motor relay (Power Probe II), which is likely located in the under hood fuse/relay box. Remove relay, clean contacts, and apply dielectric grease.

. Check connector to the fan.

. Check for power to the fan, using a test light or multimeter.

. Jump the fan motor, to see if it runs.

. Check the fan switch.