Question about Honda Civic

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2002 Honda Civic LX a/c swith does not switch to any specific setting the vent just blows in face, leg, and defrost mode constantly, and center 2 vent do not blow at all.

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  • Honda Master
  • 20,706 Answers

That is called , mode control or dampers.
2 things are needed to get dampers to work
1: the controller most actually work, that is send the command to do so. (dash part is controller)
2: the damper controller must not be bad or jammed.

the FSM covers this 100% ;and shows how to do each test.
read the fSM and see how to do this,
there are 3 systems, many cars, this era.use 2 of the 3 ways
1: cables. (barbaric but never fail, but sure they can fail {FATE})
2: vacuum controls (valves and servo slaves)_
3: electric motor controls. switch on dash, motor in heater box.
so all you do is look at the mode lever. and see if its
cable or wires? a cable is like brake cables on a bicycle.
if it has wires, then its motor controlled.
the FSM shows the logic for this wires.
and is unique to each car maker, model and year, and this fact
makes the FSM indispensable to any fix. (besides wild guessing)
there are many sub models on all hondas. and options.
like climate option packages, etc.
so all this comes to bear , at repair time. what really is in there, we say to self.

see system 1 and 3 here
http://www.fixkick.com/AirCond/heater.html
nice photos of typical HVAC guts.

i went oline to alldata.com , so could you. to see what you have.

a 7 wire motor control for MODE. (BINGO)
a 3 wire recirc, motor
and 1 heater valve cable (temperature)

Posted on Feb 12, 2014

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Posted on Jan 02, 2017

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jmgldsmth
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SOURCE: 1999 f350 ac blows from defrost vents instead of ac vents

check for a vacuum line that has fallen off the diaphram vacuum "switch can" near the vent shift lever at the heater box under the dash passenger side

Posted on May 28, 2009

  • 279 Answers

SOURCE: AC blows through defrost and floor vents instead of ac vents

You have a vacuum leak in the system that controls the vent doors. First check for cracks at the vacuum reservoir, then check the various vacuum hoses and vacuum motors for a leak.
Charlie

Posted on Jun 19, 2009

MNfisherman
  • 11896 Answers

SOURCE: Jeep AC blows cold air at defrost and feet but not through vents

There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Posted on Jul 01, 2009

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1 Answer

2005 ford focus mk1 A/C button not working Compressor works since Cold air comes from defroster and heating vents in both sides of the dashboard


A/C Switch Assembly
The A/C switch assembly integrates the A/C request button, RECIRC request button and rear DEFOG button into a single assembly.
The A/C request button is enabled by the blower motor switch. The A/C switch assembly sends a reference signal to the blower motor switch. When the reference signal is grounded (blower motor switch turned ON) the A/C request button is enabled. The A/C request button is disabled when the blower motor switch is in the OFF position. When the A/C request button is activated (indicator ON), an A/C request signal is sent to the PCM. The A/C request button indicator can be toggled on and off when in the FLOOR/DEFROST or DEFROST mode, but an A/C request signal will be sent to the PCM regardless of the indicator status.
When the RECIRC request button is activated (indicator ON), the air inlet mode door actuator will drive to the recirculated air inlet position. When the RECIRC request button is deactivated (indicator OFF), the air inlet mode door actuator will drive to the fresh air inlet position. The RECIRC request button is disabled when in the FLOOR/DEFROST or DEFROST mode.

Jul 13, 2016 | Ford Focus Cars & Trucks

1 Answer

Can't swith vent from defroster to vent


the switch where you turn it to blowing at your head is probably out. you will need to replace the switch control where your defrost, foot, head etc. http://www.xcardiag.com/

Jun 17, 2014 | 2006 GMC Envoy

1 Answer

Front defrost


the fsm covers this 100% , why not consult that first.
but check the fuses first, always, for all electric failures.

its all here.
mode control and recirc modes. do the mode motors work?
did you just get car and never here them run, ever?
and not noticing they are now dead?

http://hondatech.info/downloads/Auto/Manuals/Civic/

Sep 10, 2013 | Honda Civic Cars & Trucks

1 Answer

No air coming out of the front defrost


defrost vent may be clogged or switching mode (defrost/passenger face/passenger leg) not working

Oct 15, 2012 | Honda Cars & Trucks

1 Answer

2001durango vent only blows air through face vent and defroster.


the vent door is broke in the heater control box under dash

Feb 13, 2009 | 2002 Dodge Durango

2 Answers

How to replace heater core 93 honda del sol


Heater Core Honda Civic/CRX/del Sol 1984-1995 Repair Guide REMOVAL&INSTALLATION
See Figures 1, 2 and 3
REMOVAL & INSTALLATION
  1. Disconnect the negative battery cable and disable the SRS system (if equipped.)
WARNING All SRS wire harnesses are covered with a yellow insulation. Read the SRS precautions found in this section and install the short connectors as described.
  1. Properly drain the cooling system.
  2. Disconnect and plug the heater hoses at the firewall.
  3. Disconnect the heater valve control cable.
  4. Remove the heater unit attaching nut on the firewall.
  5. Remove the dashboard as follows:
    1. Remove the center panel.
    2. Disconnect the wire connectors at the fuse box.
    3. Disconnect the sunroof switch connector, if equipped.
    4. Disconnect the ground cable at the right of the steering column and the power mirror switch wire connector.
    5. Remove the side air vent knob and face plate.
    6. Remove the screws attaching the air vent control lever.
    7. Remove the center panel, radio and heater control head.
    8. Remove the gauge upper panel (4-door) or instrument panel (3-door).
    9. Disconnect the speedometer cable.
    10. Remove the center upper lid.
    11. Remove the side defroster garnishes on both ends of the dash.
    12. Lower the steering column.
    13. Remove the dashboard mounting bolts.
    14. Lift and remove the dashboard assembly.
  6. Remove the heater duct.
0900c15280061a21.jpgFig. 1: Removing the heater duct assembly
  1. Remove the steering column bracket and duct assembly.
  2. Remove the heater assembly mounting bolts.
  3. Remove the heater assembly and remove the heater core.
0900c15280061a22.jpgFig. 2: Removing the heater case assembly 0900c15280061a23.jpgFig. 3: Removing the heater core from the heater caseTo install:
  1. Install the heater core into the heater unit.
  2. Install the heater assembly and the attaching bolts.
  3. Install the heater duct and steering column bracket.
  4. Install the dashboard assembly. Tighten the mounting bolts until just snug.
  5. Raise and attach the steering column.
  6. Install the center upper panel.
  7. Connect the speedometer cable and install the instrument gauge assembly.
  8. Install the control head, radio and center panel.
  9. Install the side vent and face plate.
  10. Connect the ground cable at the right of the steering column and the power mirror switch wire connector.
  11. Connect the sunroof switch connector, if equipped.
  12. Connect wire connectors at fuse panel.
  13. Install the heater unit attaching nut on the firewall.
  14. Connect the heater valve control cable.
  15. Connect the heater hoses at the firewall.
  16. Connect the negative battery cable.
  17. Fill, bleed and leak check the cooling system.

Sep 01, 2008 | 1996 Honda Accord

1 Answer

Radio


If the radio is aftermarket, they cross the circuitry of the antenna near the defroster, causing static in the antenna everytime you turn it on. Disassemble the radio and check for the wiring. Worst case scenario: they used the Positive wiring for the defogger switch and connected a wire to the radio's ACC cable.

Aug 23, 2008 | 2002 Honda Civic

1 Answer

A/c not changing to heater


The air temp control blend door is inop, it may be electric or driven by engine vaccum, but either way this is the problem to fix. I suspect yours is vaccum since more than one function is not working, temp control and air distribution, i.e. floor, defrost and dash vents

Aug 18, 2008 | 2002 Honda Civic

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