No Heat 2001 Dodge Caravan.

[JMac101]

Heys Guys.
I have an 01' Dodge Caravan 4 cylinder.
I have had no heat for over 2 winters now.
When turning the heat on after warm up in the winter I get about 15-30 seconds of warm air followed by ice cold air.
The heat does not work on any setting.
I have had the water pump, timing chain, coolant changed. I changed out the thermostat and flushed the radiator. I also changed the blend door actuator motors under the dash.
Both the lower and upper radiator hoses get hot and the lower and upper heater core hoses get hot as well. Yet still no heat.
I was told it is most likly an air temperature blend door.
Can anyone verify this or give me a detailed tip on how hard it is to access a air temp blend door that seperates the heat from the cold air?
I have a 2001 Dodge Caravan 4 Cylinder motor, I know all motors are different but this van being a 4 cylinder is pretty easy to work on and I was hoping the blend door would be just as easy to access as most of the other parts.

Thanks in advance.

 

[JMac101]

FLUSHED THE HEATER CORE AS WELL I FORGOT TO MENTION THAT>

 

[J. A. Rizzo]

Heater control valve? It's about $11 at Rock Auto and looks simple to install.

 

[Chris142]

Since the heater hoses are hot that means that the hot water is getting to the heater and back to the engine. That leaves the blend door and it's motor.

 

[JMac101]

I changed the 3 motors that control the blend doors in the cabin
but still no heat. Could it be the blend door itself?
Where is a heater control valve located?

 

[01rangerxl]

Originally Posted By: JMac101

Where is a heater control valve located?


Not sure with this particular vehicle, but on my Explorer the valve was on the coolant lines going to the heater core under the hood.

 

[Gary Allan]

What engine do you have? Ooops! Never mind. If it was a 3.0 it would have a heater control valve. I dunno about the 2.4 4 banger.

 

[JMac101]

Anyone know where the blend door is actually located? I know I have to rip out the dash but im talking in which section the door would be in?
Anyone know if I can get to it and replace it or even permenantly wedge it closed?

 

[FL_Rob]

Re: 2001 Dodge Caravan heating issues [In reply to] Login - Sign Up

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Tom- kc

Found this bulletin ...See if it applies.....

NUMBER: 24-006-01
GROUP: Heating & A/C
DATE: May 4, 2001
SUBJECT:
No Heat on Front Right Side

OVERVIEW:
This bulletin involves replacing the blend air door shaft with a new part.

MODELS:2001 (RS) Caravan/Town & Country/Voyager 2001 (RG) Chrysler Voyager (International Markets)

NOTE : THIS BULLETIN APPLIES TO LEFT HAND DRIVE (LHD) VEHICLES WITH ZONE CONTROL OR AUTOMATIC TEMPERATURE CONTROL (ATC) HVAC SYSTEMS.

SYMPTOM/CONDITION:
The vehicle operator may complain of no heat in any mode, from the front right side of the vehicle.

DIAGNOSIS:
If the above condition is verified, perform the Repair Procedure.


1. Disconnect and isolate the negative battery cable.
2. Remove the silencer pad from beneath the driver side end of the instrument panel.
3. Remove the driver's side knee bolster.

4. Remove the three screws that secure the heater core shield to the left end of the HVAC distribution housing (Fig. 1).
5. Pull the heater core shield rearward far enough to disengage the two location tabs that position the front of the shield to the receptacles in the two lower finger formations of the heater/air conditioner housing near the dash.
6.
Remove the heater core shield from the distribution housing.

7. Remove the two screws that secure the passenger blend door actuator to the distribution housing (Fig. 2).
NOTE : MARK LOCATION OF PLASTIC EXTERNAL STOP POSITION ON THE BLEND AIR DOOR SHAFT FOR REINSTALLATION.

8. Remove the metal blend air door shaft and plastic external stop attached to the shaft.
9. Install the new blend door shaft through the blend air door and into the housing.
10. Reinsert the plastic external stop to the blend air door shaft in the same position as it was removed. Rotate the blend air door shaft by hand to ensure the plastic door stop stops rotation of the shaft between the stop bumpers in the housing.
11. Position the blend air door actuator onto the distribution housing. It necessary, rotate the actuator slightly to align the splines on the actuator output shaft with those in the blend air door linkage.
12. Install and tighten the two screws that secure the blend door actuator to the distribution housing . Tighten screws to 2 Nm (17 in. lbs.).
13. Position the heater core shield onto the distribution housing. Be certain that the two location tabs on the front of the shield are engaged in the receptacles in the two lower finger formations of the evaporator housing near the dash panel.
14. Install and tighten the three heater core shield screws and tighten to 2 Nm (17 in. lbs.).
15. Install knee bolster.
16. Install silencer pad.
17. Reconnect battery negative cable.
18. Perform the heater-NC control calibration procedure:
a. Turn the ignition switch to the ON position.
b. Simultaneously depress and hold the Power and Recirculation buttons on the heater-A/C control for at least five seconds. The manual heater-A/C control Delay Light Emitting Diode (LED) and Recirculation LED, or the Automatic Temperature Control (ATC) heater-A/C control Delay and Recirculation graphics will begin to flash when the calibration procedure has begun.
c. The calibration procedure should take less than three minutes to complete for the manual system, and less than twenty seconds for the ATC system. When the LED's or graphics stop flashing, the calibration procedure is complete.
d. If the LED's or graphics continue to flash beyond the time stated above, it indicates that the heater-A/C control system has detected a failure and a Diagnostic Trouble Code (DTC) has been set. Use the DRBIII(R) scan tool and the appropriate diagnostic

 

[FL_Rob]

step 18 above, the calibration proceedure ,since you mentioned all else has been replaced ,this step 18 caught my eye.I'll google more info.add this.
. Start engine. Turn front blower motor switch to any position except off. Set mode control selector to face position. 2. Turn ignition switch to OFF position. Depress and hold recirculation button. Start engine, and continue to hold recirculation button and observe recirculation button LED indicator light. The recirculation button LED indicator light will flash repeatedly. When recirculation button LED indicator light stops flashing, release recirculation button. Programming is complete. 3. Turn engine off. Wait 10 seconds, then restart engine. Verify recirculation mode default setting is properly programmed. Repeat this procedure to select between recirculation mode default and outside air mode default settings.
HEATER-A/C CONTROL CALIBRATION The heater-A/C control module must be recalibrated each time an actuator motor or the control module is replaced. If the vehicle is so equipped, the calibration procedure also includes rear HVAC positions for each actuator motor. 1. Turn the ignition switch to the On position. Simultaneously depress and hold the Power and Recirculation buttons on the heater-A/C control for at least five seconds. 2. The manual heater-A/C control power Light Emitting Diode (LED) and Recirculation LED, or the Automatic Temperature Control (ATC) heater-A/C control Delay and Recirculation graphics will begin to flash when the calibration procedure has begun. 3. The calibration procedure should take less than two minutes to complete for the manual heater- A/C control, and less than twenty seconds for the ATC heater-A/C control. When the LEDs or graphics stop flashing, the calibration procedure is complete. 4. If the LEDs or graphics continue to flash beyond the normal three minute (manual) or twenty second (ATC) calibration time, it indicates that the heater-A/C control has detected a failure and a Diagnostic Trouble Code (DTC) has been set. 5. Use a DRBIII® scan tool to perform further diagnosis. Refer to the appropriate diagnostic information. The LEDs or graphics will continue to flash even after the ignition switch is cycled Off and On, until a successful calibration is completed or until the vehicle has been driven about 8 miles.

This info is from '2car pros' website.

 

[JMac101]

Thanks for that detailed answer. I will try the test out. Do you know where the blend door itself is located? maybe I could cut it out or force it closed. Thanks

 

[atikovi]

Take a vacation to Florida, sell it, fly home on discount airline. Problem solved.

 

[JMac101]

LOL! Wish i could. I have to work lol. Plus the van was given to me by my dad who passed away last year so Id keep it even if the doors fell off lol.

 

[JMac101]

on a lighter note. I hear that you need to remove the entire dash to change the blend door. I looked under my dash by the pedals on the drivers side just now. I see the 2 actuator motor that I have replaced one for air position and the other for drivers vents. I can also see on the top towards the center a rectangular tube that it attached to the firewall and when you follow it down about 8inches or so the motors I replaced are attached to it. Anyone know if the blend door is in there? it has a couple screws on the housing. Maybe I can get away with swapping that door out without removing the dash. Motor wise my van is pretty easy to work on. Its a 4 banger. I just hope the blend door will be just as easy and even though I feel that the blend door is where Im looking at now, I still feel that would be too easy lol. Anyone??

 

[JMac101]

anyone know of the exact position of the blend door vent that comes through the fire wall?