To replace the heater core on a 1990 Dodge Spirit, first disconnect the negative battery cable and drain the coolant from the radiator. Remove the dashboard and center console to access the heater core housing; this may involve removing various components like the radio and controls. Once you have access, disconnect the heater core hoses and unbolt the heater core from its housing before installing the new unit. Reassemble everything in reverse order, refill the cooling system, and check for leaks.
Probably a bad thermostat - stuck open so the water temperature in the engine block doesn't get hot enough to make the heater warm.
Dodge does not use inertia/reset switches.
It is located under the center console under the heater controls. Its a small metal box with a 8 wire plug.
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.
"5-1/4"
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Struts front, shocks rear.
easiest way to fix a heater core prob, especially if it's stopped up, is to flush it, but if you don't want to take the risk, then you need to tear out the dash. That's a job.
very carefully
sounds like you still have a leak drive safe
No, ususlly no internal damage if belt breaks.
No, the computer controlls that.