Question about 1992 Honda Civic

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A/C control 1 and 2 not working...No air coming.. but 3 and 4 ok...

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You have a faulty blower motor resistor. Usually they're located on the blower motor or behind the A/C controls. The resistor controls speed settings. When they become faulty (common) certain fan speeds don't work or all speeds may fail at once.

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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Having problems with climate control. Temp setting does not come back on to the last setting it always comes back on at 75. Also when pushing the front defrost it doesn't blow air.


You may want to have it check for DTC'S diagnostic trouble codes . A code may point to the problem , these HVAC systems are very complex .
DTC B0248, B0268, B0408, B0418, B0428, or B3531
The HVAC door actuator is an electronic motor with a feedback potentiometer. The HVAC control module supplies power and ground to the actuator. The HVAC control module controls the direction of the actuator by changing the polarity of the control circuit. When the actuator reaches the desired position, voltage is removed from the control circuit. The HVAC control module determines the current position of the actuator by monitoring the feedback voltage of the door position signal circuit. The feedback potentiometer position is a function of the actuator position.
• Air flow control 3 circuit refers to the front mode actuator
• Air flow control 7 circuit refers to the recirc actuator.
• Temperature control 1 circuit refers to the driver air temperature actuator
• Temperature control 2 circuit refers to the passenger air temperature actuator
• Temperature control 3 circuit refers to the rear air temperature actuator
• Air flow control 10 circuit refers to the rear mode actuator
DTC Descriptors
This diagnostic procedure supports the following DTCs:
• DTC B0248 Air Flow Control 3 Circuit
• DTC B0268 Air Flow Control 7 Circuit
• DTC B0408 Temperature Control 1 Circuit
• DTC B0418 Temperature Control 2 Circuit
• DTC B0428 Temperature Control 3 Circuit
• DTC B3531 Air Flow Control 10 Circuit

Your having air flow issues and temp. control !
DTC B0413, B0423, B0433, B3761, B3773, or B3782
This diagnostic procedure supports the following DTCs:
• DTC B0413 Temperature Control 1 Feedback Circuit
• DTC B0423 Temperature Control 2 Feedback Circuit
• DTC B0433 Temperature Control 3 Feedback Circuit
• DTC B3761 Air Flow Control 3 Feedback Circuit
• DTC B3773 Air Flow Control 7 Feedback Circuit
• DTC B3782 Air Flow Control 10 Feedback Circuit

Do you know what a scan tool is ?
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, command the appropriate actuator in both directions.
Does the actual parameter of the appropriate actuator change?

Jan 10, 2017 | 2005 Cadillac STS

1 Answer

Climate Control - Heat and cool work fine. Air flow is directed to defrost /floor. No indication (Sound or sight) that the vacuum diaphrams are being activated. The display on the dash matches the...


Does your vehicle have manual or automatic climate control ? You system is stuck in floor an defrost mode ?

03 mercury grand marquis hvac air flow .-13qahwfdndst2y1hypmr2cdq-4-0.gif Item Part Number Description 1 18A318 Vacuum control motor-floor/defrost door 2 - Defrost air flow 3 18A478 Floor/defrost door 4 18476 Heater core 5 19860 Evaporator core 6 19805 Blower motor 7 - Outside air inlet 8 19A813 Air inlet door 9 18A318 Vacuum control motor-air inlet door 10 - Recirculated air inlet 11 18B545 Temperature blend door 12 18A559 Panel door 13 - Panel air flow 14 18A318 Vacuum control motor-panel door 15 - Floor air flow 16 - Vacuum from the engine intake manifold 17 19A563 A/C vacuum check valve 18 19A566 Vacuum reservoir tank and bracket 19 19980 EATC control
Pull the control panel an check for vacuum

vacuum lines hvac 03 grand marquis-13qahwfdndst2y1hypmr2cdq-4-2.gif Item Part Number Description 1 White Air inlet door 2 Yellow Floor/defrost door 3 Red Floor door 4 Blue Panel door 5 Black Source vacuum 6 - Not used


VACUUM APPLICATIONS CHART-ELECTRONIC AUTOMATIC TEMPERATURE CONTROL Switch Port Vacuum Harness Hose Color Func- tion Manual Override Selector Buttons OFF MAX A/C NORM A/C VENT FLOOR FLOOR/ DEF DEF 1 White Air inlet 2 Yellow Floor/ panel (partial) 3 Red Full floor 4 Blue Panel 5 Black
Source

May 21, 2017 | 2003 Mercury Grand Marquis

1 Answer

Cooling fans on radiator will not come on. what can i do?


Hi kattrinahawk, If your cooling fans do not work, take a second to understand the system: 1)Fans will cycle on and off depending on engine temperature. 2)Fans will come on when Air Conditioning system is On. 3)Fans will come on if certain malfunctions in engine electrical systems. Fans are controlled via the ECM/PCM or sub computer. Fans usually have separate fuses and or relays/resistors. Ok so lets check a few things: 1)Check your engine coolant level, fan operation is depending on correct/full level 2)Turn your A/c on max settings and wait a few seconds see if fans cycle. 3)Check for obstructions or loose wiring around/on fans. 4)Inspect fuses per owners manual locations identification.

May 11, 2011 | 2008 Ford Escape

1 Answer

I have a Mazda B2500 TD 4 wheel drive, the fan control dial does not work on 1, 2 and 3 but does on 4 but if the air con is switched on while dial is on 4 then it kicks the air con off. What is the...


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Jan 16, 2011 | 2007 Mazda B Series

1 Answer

Car - interior fan control working but only on full or 1 bar


switch is bad look in salvage yard for new used arts

Jan 17, 2010 | 2005 Mazda 3

2 Answers

Heater blower is not working in 1, 2, 3 and fan


MY 2003 MALIBU AC WORK VERY COOL FOR ABOUT ONE HOUR AND THEN TURN A BIT HOT AND THEN NO AIR COME OUT WHY I HAVE CHECK THE FREON AND ITS OK .

Nov 22, 2009 | 2003 Chevrolet Malibu

1 Answer

2.0l alfa 156 bad idle try every thing change 4 airflow meters 3 trotllebody motors lambda sensor and many about 4 alfa mechanics do nothing but take my mooney after i put new air flowmeter or trtl motor...


Change the idle air control valve.That seems to be your problem.The only other thing it may be is your air temp switch located on the air intake.

Jul 09, 2009 | 2000 Alfa Romeo 156

1 Answer

2007 Chevy Uplander Rear Overhead A/C Vents Won't Work


Have you checked the Aux switch near the bottom of the center control console.
There should be a knob with: Aux, Off, 1, 2, 3. This is the switch for the rear AC blower.
If the driver wants to control the rear AC, use the 1, 2, 3 settings.
If you put it on Aux, Than the rear AC is controlled by the passenger in the back seat using the extra controls located on the Overhead DVD player. (The front AC must be on the rear to work)

Jul 09, 2009 | 2006 Chevrolet Uplander

1 Answer

Air control wont work on speed 1, air is blowing from 3 points


Your speed controler is in need or replacement.. if it only works in that one speed then it is like a reastat.. your motor speed is controled by this switch .. thanks and holler if you need more. Jerry

Apr 23, 2009 | 2003 Chevrolet Impala

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