Question about 1993 Honda Civic 4 Door

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Heater control panel

The heater controlpanel in my 93 civic dx is not allowing me to turn it to heat. The knob acts like it is not activating in position and just slides right back to cool. Any ideas on how to fix this? It's getting pretty cold out now. =)

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On the passenger side floorboard, against the center section, up high, is a lever that you can turn manually to get heat from your heater. This works when the dash control is inop.

Posted on Nov 18, 2008

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Oh my god mine does the same. but sometimes mine will stay all the way over on the red side and still bl.ow cold air. im freaking out thinking i need new heater. it was 29 degrees here today.....

Posted on Nov 18, 2008

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Does the slider for the temperature control feel like it has tension and is moving mechanisms in the dash somewhere? If not, the cable, which has an "S" curve on the ends, may have slipped out of the arm either behind the heater control panel or at the AC box where the door is. Also, check the heater control valve on the firewall under the hood to see if the arm on the valve is moving properly when the temperature slider is moved.

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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.

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