My wifes 2002 dodge stratus only blows cold air on all settings. Also, it didn't go out all at once but sporadically. She allowed her sister to drive the car at one point and after that the heater only worked of the highest of fan settings. The car is in good shape otherwise, as it is what my wife drives.
Its more than likely the blend door motor, common on Chrysler vehicles.
SOURCE: heater is blowing cold air 1999 dodge stratus
A heater blowing cold air can be a few things. have all of these things check for proper operation to find the source of the problem.
1. Coolant level
2. Thermostat
3. Water Pump
4. Heater control valve
5. Make sure that the heater control doors are closing when you switch from hot to cold.
6.Last but not least if the climatic controls are electric it maybe at fault.
Good Luck
SOURCE: 2004 dodge stratus heater/ac issues
I had the same problem with my '97 Stratus. There is a large resistor in the fan motor circuit that has died and needs to be replaced. It's well up under the dash, behind the glove box if I recall correctly, so unless you are a contortionist and have the tools, have a shop replace it.
SOURCE: heater
Check coolant level and then check to see if both heater hoses are hot. If on is hot and the other luke warm or cold, you might have a plugged heater core. If both are hot then you might have a problem will the what they call a "blend door actuator". Both need to be diagnosed be a mechanic because they will required the dash to be removed to be repaired. $$!!!
Good luck
Harry.
SOURCE: 2002 caravan, heater problems
That was a common complaint a few years back, due to the fact that the heater core is a little too much higher than the engine, which requires that extra push it gets when engine RPM's increase. One thing I did do on my Caravan was remove my hoses to the heater core, and use a small external pump with hoses to circulate C.L.R. through my core for a while, then let it sit with CLR in the core overnight.Next day I circulated it through again, both ways by reversing hoses, and then re-attached hoses, bled air out of system, and notice quite an improvement in heat at idle. Once cleaned out, the heater core allowed coolant flow through it better at idle. If your stumped by explanation, take it to an automotive shop, or a Rad shop, and get a quote on flushing that core out for you. I recommend the CLR, but it might be too time consuming for you , but a flush will probably show some noticeable improvement.
SOURCE: 2001 Dodge Caravan heater blows cold air when stopped
Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.
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