Heat isnt working...place on heat and turn on but it just stays cold?? Its been like this for like a week or so..it was doing this then started for a few days where it would kinda get warm again and then stopped again a couple of days ago..

sounds like a faulty sensor

sounds like you need more antifreeze , make sure fluid is at proper line on overflow tank

Are you sure there are no air pockets in the cooling system ? Did you bleed all of the air out when you added coolant ?

If your "check engine" light is turn on, I suggest scanned the PCM to know exactly what fault code is stored there. Additionally, could be some problem with the "temp sending unit".

Keep us updated.

Most likely your thermostat has failed and is stuck open. Engine coolant goes through the heater core and is used to heat the air that is blown into the cabin. If the thermostat fails, the coolant doesn't stay inside the engine long enough to absorb enough heat to make the climate control air blow hot. Change your thermostat (flush the coolant and have it replaced while you do this), and you should be back in business.

There is a recall that has something to do with the air/heat system in 2005 Dodge Grand caravans. Recall F01. Here is a link. I had mine done two weeks ago, cost me nothing. My air conditioner was overheating.

It sounds like you have a bad temp door actuator.

the heater switch on the dash activates a valve allowing hot water into the heat exchanger under the dash. I think the valve is not opening so the heat exchanger stays cold. The linkage could be faulty or the switch could be faulty.

You have a problem with the temperature control blend door actuator in the air ducting system, this part can't be replaced without removing the dash assembly.

Hi, do you turn the AC as soon as you start the car? If this is the case yes if will blow hot until the AC kicks in. What the ac does is not put cold air in to the vehicle it removes the heat from the air, so it does take time for it to do this.A little trick for a bit quicker is to roll down a window these just helps. I read that once it starts getting cold it stays cold is this right? Once it stays cold have you notice that if you stop for just like running into the store and you start the car back up is it still cold or does the problem starts over? Hope this helps some please let me know.

Cheers