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1996 ford explorer, automatic (eatc) climate control system is only blowing cold air on all temp settings. no diag codes stored in the climate control system.

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6ya6ya
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Posted on Jan 02, 2017

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  • 4 Answers

SOURCE: heat works on driver side, passenger side blows cold air.

flap motor in rt side

Posted on Oct 22, 2008

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  • 24 Answers

SOURCE: heat works on driver side, passenger side blows cold air.

Did you check your coolant level or was it low and you added to it at some point? If so the system my need to be bleed or worst case the thermostat is going bad.

Posted on Jan 03, 2009

harley9701ha
  • 424 Answers

SOURCE: Temperature Control not working on 1999 Ford Explorer

Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.

Posted on Jan 26, 2009

chuck943
  • 783 Answers

SOURCE: 2006 Ford Crown Victoria HVAC only blows thru windshield defrost

You have a vacuum leak. Defrost is the default postion(no Vacuum). Start by finding the small black vacuum line near the heater hoses at the fire wall under the hood.Trace it back, it should go to a square black reservoir . Not totally sure exactly where it is located on this model,shop manual doesn't show a very good pic, but it states to remove wiper arm and pivot shaft to remove it. You will see a second line going from here to intake manifold vacuum port. Make sure you don't have a leak there somewhere.

Posted on Mar 14, 2009

alicantecoli
  • 22326 Answers

SOURCE: passenger side blows hot air when front control set to Air

you cant adjust it ,this requires the dealers computer to re set it,or a phyiscal control has packed up like a vacumn pipe has split where it pushes onto the valve that controls the flap in the heater unit.

Posted on Apr 26, 2009

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1 Answer

1998 Lincoln Town car Getting code 31 in Auto Temp Control what is the meaning of that code. no temp control either hot or cold


031 B1251 IN-CAR TEMPERATURE SENSOR OPEN GO to Pinpoint Test B
PINPOINT TEST B: IN-CAR TEMPERATURE SENSOR INOPERATIVE B1 CHECK SENSOR RESISTANCE
    NOTE: An open sensor will cause warm air discharge at 18°F (65° C) setting. A shorted sensor will cause cool discharge air at 29°F (85°C) setting.
  • Disconnect the A/C ambient air temperature sensor.
  • Using an ohmmeter, measure the resistance across the sensor terminals and compare the readings with the following sensor resistance table:

    Approximate Temperature Sensor Resistance Acceptance Range 10-20°C (50-68°F) 37K-58K ohms 20-30°C (68-86°F) 24K- 37K ohms 30-40°C (86-104°F) 16K-24K ohms
Are resistance values within the specified limits?
Yes No GO to B2 . REPLACE A/C ambient air temperature sensor and bracket. RESTORE vehicle. RETEST system. B2 CHECK ASPIRATOR INSTALLATION
  • Gain access to automatic temperature control sensor.
  • Check for proper installation of automatic temperature control sensor hose and elbow.
Is aspirator installed properly and hose connected?
Yes No GO to B3 . SERVICE automatic temperature control sensor hose and elbow as necessary. RESTORE vehicle. RETEST system. B3 CHECK CIRCUIT 470 (PK/BK) AT AUTOMATIC TEMPERATURE CONTROL SENSOR
  • Turn ignition switch to the RUN position.
  • Turn EATC module to NORM A/C position.
  • Disconnect automatic temperature control sensor.
  • Using a voltmeter, check Circuit 470 (PK/BK) for voltage at sensor connector.
Is voltage 5 volts?
Yes No GO to B5 . GO to B4 . B4 CHECK CIRCUIT 470 (PK/BK) FOR OPEN
  • Disconnect connector C227 at EATC module.
  • Using an ohmmeter, check Circuit 470 (PK/BK) between EATC module and automatic temperature control sensor for open.
Is there 5 ohms or less?
Yes No SERVICE Circuit 470 (PK/BK) for open. RETEST system. GO to B5 . B5 TEST CIRCUIT 470 (PK/BK) FOR SHORT
  • Using an ohmmeter connected to a good ground, connect other lead to EATC module connector Pin C227 , Circuit 470 (PK/BK).
Is resistance less than 10,000 ohms?
Yes No SERVICE Circuit 470 (PK/BK) for short. RESTORE vehicle. RETEST system. GO to B6 . B6 TEST CIRCUIT 790 (W/O) FOR OPEN
  • Using an ohmmeter, connect one lead to EATC module connector Pin C227 , Circuit 790 (W/O) and other lead to automatic temperature control sensor Circuit 790 (W/O).
Is resistance 5 ohms or less?
Yes No GO to B7 . SERVICE Circuit 790 (W/O). B7 TEST CIRCUIT 790 (W/O) FOR SHORT
  • Using an ohmmeter connected to a good ground, connect other lead to EATC module connector Pin C227 , Circuit 790 (W/O).
Is resistance less than 10,000 ohms?
Yes No SERVICE Circuit 790 (W/O) for short. RESTORE vehicle. RETEST system. REPLACE EATC module. RESTORE vehicle. RETEST system.

Mar 24, 2018 | Lincoln Cars & Trucks

1 Answer

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

Feb 05, 2017 | 2006 Mercury Mountaineer

1 Answer

Heater fan runs when heater is off.06 ford expoler


Automatic or manual climate control ?
  • The blower motor does not operate correctly - manual climate control
  • Circuitry short
  • A/C blower motor resistor
  • A/C blower motor switch
  • Blower motor high speed relay
  • Go To Pinpoint Test O .

  • The blower motor does not operate correctly - EATC
  • Circuitry short/open
  • A/C blower motor speed control
  • EATC module
  • Go To Pinpoint Test Q .

Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
Normal Operation Under normal operation, the blower motor control module receives a 1-2 volt signal from the EATC module through circuit CH218 (GN/VT) to determine the desired blower motor speed. The EATC module receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the EATC module sends 12 volts to the blower control module through circuit CH217 (BN).
    Possible Causes
  • An open, short to voltage, ground or together in circuits CH218 (GN/VT), VH219 (GY) or circuit CH217 (BN)
  • Blower motor control module
  • EATC module
  • If automatic HVAC system i would suspect Blower motor control module .

Oct 27, 2016 | 2006 Ford Explorer

2 Answers

What is an ICP - RCC - Speedometer fuse for on a 1997 ford taurus dohc ICP - RCC?


Hey Brian ,
ICP - Integrated control panel
RCC - Remote Climate Control Module
Integrated Control Panel-Electronic Automatic Temperature Control
Control Assembly The Taurus, Sable vehicles group together the following systems into a single integrated control panel:
  • AM/FM stereo radio
  • clock
  • rear window defroster switch
  • electronic automatic temperature control (EATC)
  • full-logic cassette tape player
  • compact disc player control (optional)
The remote climate control module is mounted to the A/C evaporator housing behind the integrated control panel. The integrated control panel is connected to the remote climate control module with a dedicated two-wire communication link. The integrated control panel EATC features:
  • a vacuum fluorescent display (VFD) for displaying set temperature, ambient temperature, function and diagnostic trouble codes (DTCs).
  • electro-luminescent backlighting for all buttons and graphics.
  • function override buttons.
  • temperature control and blower speed rocker switches.

Jun 08, 2015 | 1997 Ford Taurus

1 Answer

Oldsmobile intrigue climate control


sound like maybe the blend door actuator is malfunctioning and needs to be replaced they are all computerized so if the actuator is not working properly it will store a code and not allow to set climat

Jan 04, 2014 | Cars & Trucks

2 Answers

Where is the electronicnautomatic temperature control module located on a 05 ford 150


I assume you have checked all fuses. It could be the heater control switch , the blower motor resister , I would start testing if power is getting pass the switch to the blower motor.

Nov 28, 2009 | 2005 Ford F-150

1 Answer

My Air panel just blinks power on and off. Is


Try the self test and calibrate for the HVAC panel :

Electronic Automatic Temperature Control Module On-Demand Self-Test The EATC module on-demand self-test will retrieve on-demand (hard fault) DTCs only, it will not retrieve continuous DTCs. Continuous DTCs can be cleared when exiting the EATC module on-demand self-test. Make sure to retrieve continuous DTCs by carrying out the Electronic Automatic Temperature Control Module - Retrieve Continuous DTCs procedure before clearing any continuous DTCs.


•The EATC module on-demand self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A diagnostic tool must be used to retrieve these concerns.
•The EATC module on-demand self-test will detect concerns in the system control functions and will display on-demand (hard fault) DTCs for concerns that are present during the self-test. The vehicle interior temperature should be between 4°-38°C (40°-100°F) when performing the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed.
•The self-test can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when the self-test is activated.
•To enter the self-test, press the OFF and DEFROST buttons simultaneously and release, then press the AUTO button within 2 seconds . The display will show a flashing blower icon for 20 seconds , after which all vacuum fluorescent segments will be displayed if there are no on-demand DTCs present. If DTCs are present the EATC module will display "00 00" and then on-demand DTCs. Record all DTCs displayed.
•If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given. See: Diagnostic Trouble Code Descriptions
•If a condition exists but no DTCs appear during the self-test, GO to Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation. See: Symptom Related Diagnostic Procedures
•To exit the self-test and retain all DTCs, press any button except DEFROST. The EATC module will exit the self-test and retain all DTCs.
•To exit the self-test and clear all DTCs, press the DEFROST button. The EATC module will exit the self-test and all DTCs will be cleared.
•Always exit the self-test before powering the system down (system turned OFF). Once the self-test is exited, the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
•Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.

Electronic Automatic Temperature Control Module - Retrieve Continuous DTCs
The EATC module will retrieve only continuous (intermittent and hard) DTCs when carrying out this procedure.


•Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
•To retrieve continuous DTCs, press the OFF and DEFROST buttons simultaneously and release, then press the RECIRC button within 2 seconds . All vacuum fluorescent segments will be displayed if there are no continuous DTCs present. Continuous DTCs are indicated by the presence of the degrees Celsius symbol (°C) on the EATC module display. Record all DTCs displayed.
•If any DTCs appear, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given. See: Diagnostic Trouble Code Descriptions
•If a condition exists but no DTCs appear, GO to Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation. See: Symptom Related Diagnostic Procedures
•To exit and retain all continuous DTCs, press any button except DEFROST. The EATC module will exit the retrieved continuous DTCs mode and retain all continuous DTCs.
•To exit and clear all continuous DTCs, press the DEFROST button. The EATC module will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
•Always exit the procedure before powering the system down (system turned OFF). Once the procedure is exited, the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
•Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.

Electronic Automatic Temperature Control (EATC) Module and Electronic Manual Temperature Control (EMTC) Module Cold Boot Process The purpose of the cold boot process is to allow the EATC or EMTC module to re-initialize and calibrate the door actuators. To carry out the cold boot process, follow the steps below.

1.Turn the ignition switch to the OFF position.
2.Disconnect the EATC or EMTC module electrical connectors.
3.Wait one minute .
4.Connect the EATC or EMTC module electrical connectors.
5.Turn the ignition switch to the ON position.
6.Select any position except OFF on the EATC or EMTC module. The EATC or EMTC module will now initialize and calibrate the mode doors. Calibration of the mode doors will take approximately 30 seconds .

Nov 02, 2009 | 2004 Ford F150

1 Answer

Heating system


it is the control module u set for heat/ac in the center of the dash, all the electronics are in side this module that do the switching and maintain the temp u set

Jan 12, 2009 | 1996 Buick Roadmaster

1 Answer

My 2004 Chevy Tahoe LT (40,000 miles)aircon blows geart cold air out of the drivers side and rear blows geart cold air, but the passenger side only blow hot air. I have cycled the air on and off, tried it...


Temp. actuator stuck on heat , probably . Manual or automatic climate control . Electrically controlled temp actuator , or the door is stuck in heat side.

Sep 16, 2017 | Chevrolet Tahoe Cars & Trucks

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