either the thermostat is not working properly or you have air in the system
Low water in the radiator will result in no heat. The water level is not sufficient to reach the heater core. The heater core will become cold.
Low coolant.
If you have no heat in your 02 grand Cherokee limited blower works heater lines are hot good circulation just no heat comes out?Maybe blocked heater core. Also check thermostat.Your problem is with the blend doors in the GC. Check the HeaterTreater eBay listings for diagnostic information and a fix.
Low Coolant? Bad thermostat? Heater core plugged or restricted? Heater core airbound? Heater control cable not working?
If equipped with rear heat it has two. IF front only, one.
heat core. leak. thermostat. no antifreeze.
Heater produsces - heat recovery finds heat and reuses it
Is your coolant level low, or maybe the thermostat is stuck open?
The blowers go out-It can be fixed and it's not too expensive. I have a 2000 grand prix that this happened to about 3 years ago.
Did you check the thermostat? If so, try the heater core. check the air mix door in the heater it may be stuck and letting outside air in
The heater on a 1999 Caravan doesn't have a heater valve. The temp is regulated with a blend air door that is controlled by the body computer and climate controll head.
heater core is leaking