Question about 2005 Chrysler Town & Country

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Automatic temperature control does not heat - 2005 Chrysler Town & Country

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  • J Powell Oct 30, 2012

    Stopped working after I pushed the rear window button and the module went blank. It came back on later and everything else seems to work except the heat. I looked at the 3 actuators and watched them move. Thinking it must be the module itself. Right or wrong?

  • J Powell Nov 05, 2012

    Problem solved! Yesterday I was going to change the oil so I was letting the engine warm up when I noticed after a few minutes that the temperature gauge was approaching the hot mark. Never done that before. So after changing the oil I was checking fluid levels when I noticed that the radiator overflow cap was open and the container was empty. I decided to wait until today to check the radiator when everything would be cold. So on my way out to BUY a new module I checked the radiator first and 3 quarts of antifreeze into the radiator and 1 quart into the overflow later...the heat works fine! Must be a diverter set up in the computer program that will not allow coolant flow to the heater if the level is too low. Cannot tell you how many hours of research time I put into this problem. Hope this helps someone else not waste the time I did.

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  • Chrysler Master
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Low coolant? You have a coolant leak,The coolant should not go low ,Inspect the waterpump,and hose,and have the system pressure tested.

Posted on Nov 06, 2012

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When heat is on it blow hot ondrivers side and cold on ppassenger side.


Do you hear any clicking sounds coming from behind the instrument panel ? Electrically controlled actuators move temp . blend doors and they wear out .Plastic gears etc..
Electronic Automatic Temperature Control System
The electronic automatic temperature control (EATC) system operation is determined by the settings on the EATC module. The EATC system automatically maintains a selected temperature for vehicle interior comfort, including capabilities to maintain separate temperature settings for the driver and front passenger. The electronic temperature control capabilities are achieved by splitting the air distribution system internally and utilizing 2 individually operated temperature blend doors. The EATC system is composed of the EATC module, automatic temperature control (ATC) solenoid and manifold, blower motor speed control, 4 vacuum control motors, 2 temperature blend door actuators, in-car temperature sensor, ambient air temperature sensor and solar amplifier (sunload sensor) to control the various functions. Do you know about DTC'S - diagnostic trouble codes ?

The electronic automatic temperature control (EATC) system must be diagnosed by first retrieving any DTCs, if present.
  • An on-demand (hard fault) DTC indicates that the fault is currently present. An on-demand DTC suggests a wiring fault, disconnected connector or component failure.
  • A continuous (intermittent) DTC alone (corresponding on-demand DTC is not present) indicates that the fault is an intermittent condition and may not be currently present. A continuous only DTC suggests a poor wiring connection, loose pin or terminal or intermittent component failure.
On-demand (hard fault) or continuous (intermittent fault) DTCs can be retrieved using a diagnostic tool. If using a diagnostic tool, refer to the diagnostic tool operating manual.
On-demand DTCs can also be retrieved by carrying out the Electronic Automatic Temperature Control Module On-Demand Self Test. To retrieve and/or clear continuous DTCs carry out the Electronic Automatic Temperature Control Module - Retrieve Continuous DTCs procedure. Always carry out the Electronic Automatic Temperature Control Module On-Demand Self Test before retrieving continuous DTCs.
If no DTCs are present, GO to Symptom Chart for the appropriate diagnostic action.

DTC EATC DTC Displayed Notes Description Action to Take B2266 2266 N/A LH Blend Door Failure or Short Go To Pinpoint Test A . B2267 2267 EATC Only RH Blend Door Failure or Short Go To Pinpoint Test A .
  • The dual temperature control is inoperative/does not operate correctly - Dual Zone EATC
  • Temperature blend door/actuator broken/binding
  • EATC module
  • CHECK the temperature blend doors/actuators for a binding or broken condition. If no condition is found, INSTALL a new EATC module. REFER to Section 412-01 . TEST the system for normal

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1999 ford expedition , runs good doesn't overheat , but puts out no heat ?


heater core might need replaced . check the hoses going to it under the hood after it gets to operating temperature .One should be hot and the other not so much

Nov 19, 2015 | Ford Cars & Trucks

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I replaced the heat blend actuator because I was not getting any heat. Now, after replacing, all I get is hot air and no cold. The A/C was working fine just before replacing.


Do you have Manual Climate Control System or Dual Automatic Temperature Control System ?
The temperature control switch:
  • is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
  • initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
  • is serviced only with the climate control assembly.
You may have disturbed something when changing the actuator , the vacuum switch o vacuum hose .

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How to diagnose a non functing Automatic Temperature Control (ATC)


that will be a dealer service issue.. they can assist with this one..

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2001 GMC Sierra 1500 fan is only working on 4 & 5 & the heater control is working intermittently.


The blower and temperature controls are independent if you have the manual system but they are integrated in the control head for the automatic version. The automatic version does not include a set of resistors. Do you know which system you have? If you have manual controls, I recommend you test the resistor with an ohmmeter. It's possible that your blend door actuator and resistor have failed independently. However, if you have the automatic system, your theory is as good as any. By the way, your wiring diagrams are available on autozone.com--they include both manual and automatic system schematics.

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2005 chrysler town and country Automatic temperature control unit does not heat


Air Temperature Control Blend Door Failure No Heat

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

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Cannot adjust temperature on the heat & air, 2000 grand marquis, cannot get any heat, air cond temperature cannot be adjusted, it stays on cold at all times


Is this an automatic temp. control or manual heater control? if it's automatic control,it can be an expensive circuit board which has gone bad. don-ohio

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No heat 2006 f150 5.4 liter i changed thermostat ,still no heat


Is there no heat even with the temperature set to max ? There is a TSB ( TSB 08-23-6 ) where when the temperature is set between 68-72* F, EATC ( Electronic Automatic Temperature Control ) has intermittent operation. The same TSB covers inability to control temperature output on the EMTC ( Electronic Manual Temperature Control ) HVAC controls. There is a new temperature blend door actuator ( p/n : 9L3Z-19E616-E ) to cure the problem, if these symptoms match the ones you are having.

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The car keeps coming up a code 23 on a 1999 chrysler 300 for the


Code 23= Blend door feedback control


On cars with automatic climate control: To enter diagnostic mode, set the temperature to 75F, press the the off button. Press Floor, Defrost\Floor, Front Defrost simutaneously for 3 seconds until the temperature display begins to flash.
On cars without automatic climate control, set the blower to any speed, turn the temperature control in between warm and cold. Press Floor, Defrost\Floor, and Front Defrost. All codes will flash via the Front Defrost button.
When the test is over all fault codes will be displayed (on cars without automatic climate control, they will be blinked out on the Front Defrost button).
Code Action
23 Blend door feedback control
24 ATC mode door feedback failure
25 Ambient temperture sensor failure
26 ATC in-car sensor
27 Sun sensor failure
31 ATC recirculate door stall failure
32 ATC blend door failure
33 ATC mode door stall failure
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1 Answer

Automatic Temp Control


I believe that is how automatic temp control works once the desired temperature setting is reached it should shut off then maintain this temperature thus kicking on and off. Or is the problem that its not getting to the temperature you are requesting.

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