themostatic switch
The Dodge Caravan heater was invented in 1984 by the Dodge and Mopar companies. Since it's creation it has evolved into a much bigger and popular van.
Because it is an Dodge. GET A CHEVY
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.
Replace heater motor resistor.
It is inside the HVAC housing under the dash.
Your heater core is probably bad.
Heater coil could have went out.
There is a fuse under the hood for the blower motor.
The engine block heater on a Dodge Caravan could be in a number of places. However, the cord for the electrical connection should be near the battery.
It should be in the heater blower motor case which is located under the glovebox.
Bad bearing in blower motor?
under the glove compartment I was told!