Either your thermostat has failed (engine stays cold) or your flap that isolates the airflow through your heater core has failed.
rear heating no working
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.
heat not working
A blown radiator hose could not cause a 2000 Dodge Durango to not have spark and not start unless the heat damaged the computer in the vehicle. Sometimes when an engine overheats, the computer that controls the firing can be damaged.
In some ac systems the blowers wont come on if only a slight tempture change is needed, or ther could be a problem in the wiring and the blowers are cut out of the heating loop It could also be that the fan limit is not working properly. Do the burners shut down after a few minutes of heating?
check the vaccum lines to the blend door and make sure that the heater core is not clogged 2001 Dakota- resistors in mine have burned out 3 times - check the wiriing harness under the dash near the fan and see if it's smoked. Dealership has no clue why this would happen. If I don't run the fan on HI it's not a problem.
I have a 2000 Chrysler cirrus it only blows cold air on the heat cycle. can someone help me as to why this is happening?
Check your heater core. You may also have noticed some moisture in the passenger floor.
Well I have a 2000 dodge durango and I had the same problem. I didn't know the answer so I kept using the a/c which the car overheated and cracked my radiator. Come to find out the fan for the a/c does not work! I guess there is a radiator fan and a a/c fan. Hope that helps!
Replace the Blower Resistor which is located behind the glove compartment. This is a common problem.
the fan is working but no heat
Your heater core is plugged up....check the two smaller water hoses that come off your water pump. if one is hot to the touch,and one is noticably cooler to the touch, then theres your problem....and it is an absolute bear to change. Go to Google Search and type Back flush heater core 2000 dodge durango. Follow the directions you will find there. It's not that difficult to do.