I turn my heat on in my 2002 Dodge Stratus an no heat comes out there is no radiator fluid at my feet so the heater core didn't break the heat had been slow to come out lately but would heat up eventually. the blower only works on settings 3 and 4 but this never caused heat not to work I drove 15 miles on the highway and it was 31 degrees and no heat ever came out my car didn't over heat but it did get hotter than normal

If it was coming out by your feet while you were inside the van, your heater core is leaking. Replacing the heater core is a big job - requires removal of the dash assembly.

Do a Compression Test on the Engine and see if you have a Blown Head Gasket. Chances are that is what is causing the Overflow... Exhaust Pressure is getting into the Cooling system

See if your library has a Stratus shop manual and check the heating system chapter. You didn't say if the engine was reaching operating temperature or not. If the engine is warm but you are not, I would say the problem is in the heat exchanger somewhere. If your engine is cold, you can't really expect the heater to get warm, now can you. Then you have a different problem to chase.

Lack of water on your floor means your heater core is not leaking. It could still be plugged somewhere. The fact that you get some heat initially, but it turns cold when you turn the fan on, sounds like a lack of adequate warm water to the heater core to me. If the engine is warm, it could be a circulation problem of some sort.

thats where your problem lies at... take both hoses off and back flush the heater core, till water runs freely through it.

Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Most of the time this (no heat at idle/heat when driving) is an indication of low radiator fluid. Check the fluid level while the engine is cold and on with the heater on high.

The thermostat on this car is located on the passenger side lower Engine block. Follow the lower radiator hose and it will lead you right to it. The Wheel and splash guarding need to be removed as well as the Alternator to gain access to the housing bolts. It about a 3 hour job to replace thermostat.

Seems like the heater core is possibly plugged. I would try flushing the heater core before changing it. Look in the engine compartment on the cars right side. Find where two cooling line go into the firewall. Roughly 1" - 1 1/2" in size. Disconnect these lines. You will loose fluid, so put a container under the car. Use a garden hose and flush the core in one side and make sure the water flows out the other. Then repeat this process to flush the opposite way. If the water does not flow easily, then there is something stuck inside the core, then it will have to be replaced.

ck the coolant level, if low, top off and ck for leaks. then see if the heat comes back. if coolant level is good and engine temp guage is in the middle, flush heater core. if engine temp is too low, replace thermostat.

Your probably need to get a new thermostat.