Fuse, switch, speed resistor or motor.
Those are two seperate circuits. Start with checking the fuses. There is a fuse for the radio and a fuse for the heater blower motor.
First check the coolant level, a coolant leak would cause a heater to stop working- assuming you mean the blower is blowing but it isn't hot. A stuck thermostat will also cause you problems with your heat.
Hose going from engine to heater core may have burst. Check all your coolant hoses for leaks.
it is a heater. heat. it blows heat. warm air
The heater would not be working on a 1990 Dodge Grand Caravan if the heater core is damaged or blocked. Hot coolant from the engine must flow through the core to allow hot air to pass into the cabin.
Bad bearing in blower motor?
check for coolant in system...radiator..next check for heater core leaking and verify if your thermostat is working(if it opens when engine is warmed up...hope this helps you..L
The fan motor has a short...change it.
No...
A more detailed explanation of the symptoms would have to be given in order for a determination to be made. As is, the question leaves us no indication of whether it's not blowing air period, or it it's blowing hot air, or what it's doing exactly.
the heater box is under the dashboard most of the time in the middle. The heater blowing system have doors . The door for the foot is next to your leg he have one metal cable could be this come out. If yes, have to clip it back. This electric its more difficult but just check first
not usually!!if fuse is blowing out check for short!!