Heater not working

It sounds like you have a temperature blend door actuator that is not fully operational. Here is a guide to give you an idea of what you are in for when doing the job:

https://www.2carpros.com/articles/replace-blend-door-motor

Here is what it will be like on your car:

Please let us know what happens.

Cheers, Ken

The coolant has stopped circulating at low engine speed. First check the level in the radiator and overflow reservoir to be sure they are full. Look for the marks on the reservoir. Half full is typically "full". A broken or worn water pump impeller is very common on Volkswagen's but I suppose it could happen on any car. Repair cost depends on which engine you have, how hard it is to replace the pump, and the hourly labor rate. Normally if the circulation stops enough to affect the heater, the engine would be overheating too. I think you will just find low coolant level if the engine is not overheating, because the heater is the first thing to stop working.

Caradiodoc

Start with cold engine
Fill coolant system and start car run it with heat on ask a helper to give it gas and hold it around 1800 rpm top off the coolant place cap on.

Hello,

If you do need to get back with me please tell me if your model is just the Sebring or the GTC or Limited and the engine size in liter.

Looks like you did a lot of troubleshooting I did read that you checked the heater hoses at the firewall where they go in and out and they are the same temperature?

The only thing I can think of right now looking at the manual is the Air Mix Damper door. Below is the directions for setting up it after removeal... It may be out of adjustment or the cable clip came off and the cable came off.

>> A

Hello,

Also, it looks like you may have some recalls on your vehicle. The dealer may fix these for free. Please contact the dealer service department, give them the VIN number of your car and have them check on these to see if they apply to you.

Hello,

Thanks for the information.

Now that I have the information on your specific model, it appears it may be all electrical as you have indicated especially since you have done all the work and saw there were no cables great job!

I would say it may be the blend door actuator. It is electrically controlled by a potentiometer in the actuator and allows the BCM to know the exact position of the blend door at all times.

It appears there may be the mode actuator control right next to it. If it were me I would check with the parts department to see if they are the same part number. If so swap them and if it then works that is your problem.

Here is the info below on it.

DESCRIPTION:

The blend door actuator is a motor/geartrain assembly which mechanically positions the blend door. The actuator is mounted to the bottom of the HVAC housing in the center.

OPERATION:

A potentiometer in the actuator allows the BCM to know the exact position of the blend door at all times. The blend door actuator is not serviceable and must be replaced if found to be defective.

REMOVAL:

1. Disconnect negative battery cable.

2. Remove the passengerside hush panel.

3. Disconnect the electrical connection.

4. Remove actuator retaining screws and pull actuator straight down (Fig. 24 ). Note actuator shaft position for installation reference.

Fig. 24: Identifying Blend Door Actuator
Courtesy of DAIMLERCHRYSLER CORP.

INSTALLATION:

1. Install blend door actuator on the housing, making sure the shaft spline is positioned properly with the cam (Fig. 25 ).

Fig. 25: Identifying Blend Actuator Spline
Courtesy of DAIMLERCHRYSLER CORP.

2. Install tighten the actuator mounting.

3. Connect wire harness connector to the actuator.

4. Install the passengerside hush panel.

5. Connect the negative battery cable.

Hello,

Fantastic! I have to tell you that you did a fantastic job troubleshooting and providing all the data thanks for that.

You are correct I think they build the HVAC system then say build the car around it and make it really hard to get to everything.

Glad you got it working winter is coming on!

Please do not forget to check on those recall, especially the Fuel pump ones, rear seat belt and the brake one. Those should be free to repair.

First of all, does the temperature gauge read in the normal range when the engine is warmed up? If it does not, feel the upper radiator hose. If it is cool, suspect the thermostat. If it is too hot to hold onto for very long, feel the heater hoses. They should also be too hot to hold onto for very long. If the radiator hose is real hot but the heater hoses are cool, the heater core could be plugged. Disconnect the heater hoses and flush the core out with a garden hose.

If the heater hoses are real hot but the air inside is not, the controller and actuators will need to be diagnosed.

I have never had one of those apart so I do not know how they are controlled. If you work the mode and temperature controls and everything seems to switch correctly, you might just have a plugged heater core. The two heater hoses come around to the front of the engine as metal pipes with what looks like about six to eight inches of rubber hose. (I just went through this with someone else). You can pull those rubber hoses off and run water through the heater core from a garden hose.

If that does not help, or you do not hear anything moving in the dash when you work the controls, I will have to try to figure out a diagnostic procedure.