Because its broken
heat works in back not in front front blows hot for a few mins then cold
Check the blower fuse located in the hood. It's a 40 amp fuse. Marked blower on the map
the thermostat needs to be replaced
try wiggling the wires at the blower resistor if don't work then tap on blower motor
I had the same problem and I found it to be the blower motor resister. This is what controls the blower motor settings. You will have to find out where it is on yours.
I would look into the blower motor resistor module
Depends on what you mean by heater will not work. If the blower motor will not work, it can be a blown fuse, bad blower motor, bad blower motor switch, or a defective blower motor resistor pack. If you mean that the blower motor works but there is no heat, then it can be a clogged heater core, thermostat stuck open, or defective heater control valve.
Because it is an Dodge. GET A CHEVY
replace heater relay and or heater blower motor
Blown fuse, bad motor, bad blower motor switch, or a defective Blower Motor Resistor Pack.
The blower works with the AC because it helps circulate the cool air produced by the air conditioning system. However, it may not work with the heat because there could be an issue with the heating system, such as a malfunctioning heater core or a faulty thermostat.