Question about 1994 GMC Sonoma

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A C Heater controller does not change positions turns on blower will not operate dampers

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Check the back of the unit. sometimes there is a metal piece that is connected and it has simply come off. other times the control unit (the dials you control for heat air etc) has gone bad with time and will need to be replaced

Posted on Sep 16, 2010

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1 Answer

Where is located that heater control valve 2002 Jeep Liberty 3.7


wow another Easter egg hunt for parts that dont exist
1/2 the post here are like that....
why not at least have the moxy to tell the symptoms first
like , my heater is dead, what can i do..?

on most modern car there is NO valve (water)
the dampers do all modes. and temps.

answering for no heat
if blower works? and on high? , below steps, if not say so we fix blower if dead.
1:engine not hot,must be 180f degres, or more.
2: dampers closed,(wrong) can stick or fail. by themselves.
3: controls bad from controls to dampers
4 fuses blown.
5: heater core packed, (not doing 2year service on engine coolant the reason)

Jan 13, 2016 | Jeep Cars & Trucks

1 Answer

I have a nissan almera 1.5 2004 heater wont shitch off any ideas??


not the blower it does turn off right
answer, the heater damper is stuck, or bad. why is only question !
bad damper motor (vacuum or electric drive or cable )< generic
bad controls
bad wires to any of that.

Dec 26, 2014 | Nissan Cars & Trucks

1 Answer

How to access/replace the vent selector(defroster) ?


buy one
and install it.
it has clamps remove them or unsnap them and .....
access? its in the dash.
the FSM covers all HVAC work , you can get that and read it
or hope that ALLDATA.com covers R&R for the cables.
but will cover access. (huge job on some cars)
working on the dash with out and FSM invites more broken parts.
plastics.
hidden screws and such , and how to get to them are covered in the book.
here is the control panel, pasted


Removal & Installation
  1. Remove the upper console panel.
  2. Remove the instrument cluster finish panel
  3. Release the 2 fitting claws and pull out the heater control assembly.
  4. Using a screwdriver, open the claw of the cable clamp and disconnect the defroster damper control cable. NOTE Be careful not to bend the cable wire. If the cable wire bends, the heater control assembly operationally becomes worse.
  5. Using a screwdriver, open the claw of the cable clamp and disconnect the air mix damper control cable.
  6. Disconnect the connector, remove the heater control assembly. 42050_coro_g0008.gif Removal and installation of the control panel
To install:
  1. Install the inner cable end of the air mix damper control cable to the heater control lever.
  2. Install the outer cable of the air mix damper control cable to the cable clamp. NOTE Be careful not to bend the cable wire. If the cable wire bends, the heater control assembly operationally becomes worse.
  3. Operating the heater control knob and check that it properly stops at both ends of MAX. COOL and MAX. HOT and no recoil is identified.
  4. Check that the outer cable should not be disengaged (moved) from the heater control assembly when the cable is pulled.
  5. Install the inner cable end of the defroster damper control cable to the heater control lever.
  6. Install the outer cable of the defroster damper control cable to the cable clamp.
  7. Operating the heater control knob and check that it properly stops at both ends of FACE and DEF and no recoil is identified.
  8. Check that the outer cable should not be disengaged (moved) from the heater control assembly when the cable is pulled.
  9. Connect the connector, install the heater control assembly.
  10. Install the instrument cluster finish panel
  11. Install the upper console panel.

Dec 13, 2013 | 2005 Toyota Corolla

1 Answer

No heat blower moter blowing cold air,temp on max 91, fluid is full fuses are fine car temp running good in the middle motor fan work on and off like its supossed to . i just cant figure it out and BMW...


ok the heater cor needs to bet hot, if not , no heat.
you can put hand on both tubes, of the core of any car.
do so, are the they both hot.
no, (the heater valve is closed or packed up, (no service? every 2 years)
yes then the heater, controls are bad, (bad controller or the damper flaps , motors (or cables, vacuum) controls are malfing.
lets do the flow (no pun)
1: hot engine, 180F holding or more.
2: fan blows
3: hot water flowing through the heater core....
4: dampers in the right position.
just 4 checks, find the one that fails in this order and the job
is less work, and to the real cause.

id didnt go to alldata.com to look at what type of controls you have.
we can, (so can you) if test 3 passes.
some cars have core valve , find yours and make sure it flows.
other cars there is no valve. and only the dampers block heat.







Nov 30, 2013 | 2001 BMW 325i

1 Answer

How do I take the dash apart to change the blower switch on a 2001 Mustang? I can not find a diagram or maunual that shows how to do this, can you recomend?


  1. Disconnect the negative battery cable.
  2. Remove the control panel assembly from the instrument panel.
    88236g13.gif

    A special tool, such as the one shown, is necessary to disengage the temperature control cable from the back of the control panel
    88236g11.gif

    Temperature control cable component identification

  3. Carefully lift the lock tab to detach the temperature cable from the control door shaft.
  4. Note the cable routing, then remove the cable from the vehicle.

To install:

  1. Route the cable behind the instrument panel, then engage the alignment pins and attach the temperature cable to the control door shaft until the lock tab snaps into the groove on the shaft.
  2. If necessary, install the instrument panel.
  3. Engage the cable end with the cable actuator on the control assembly. Install the control assembly in the instrument panel.
  4. Connect the negative battery cable and check the system for proper operation.
  1. Disconnect the negative battery cable.
  2. Remove the snap-in trim molding in the center console to expose the four control assembly attaching screws. Remove the four screws attaching the control assembly to the instrument panel.
  3. Roll the control panel out of the opening in the console.
    88156g04.gif

    Exploded view of the heater control panel mounting
    Click to Enlarge

  4. Detach the temperature control cable from the control panel by using Ford Temperature Cable Disconnect tool T94P-18532-A, or equivalent, to release the side locking tube, and a small flat-bladed prytool to release the top locking tab. Pull the temperature cable away from the heater control.
  5. Remove the two mounting nuts, then separate the vacuum hose and wiring harness connectors from the back of the damper door switch.
  6. Detach the wiring harness connectors from the back of the blower motor switch and the light bulbs.
  7. Remove the control panel from the center console.
    88236p10.gif

    To remove the control panel, first remove the trim cover and remove the panel mounting screws . . .
    88236p11.gif

    . . . then disengage the locking tabs on the temperature control cable . . .
    88236p12.gif

    . . . and detach the control cable. Detach all wiring harness connectors and remove the panel

To install:

  1. Position the temperature cable at the midpoint of its travel, directly between the H and C markings. Position the temperature control knob at the midpoint of its range, then connect the temperature cable to the geared arm on the blower motor wheel. Rotate the temperature control knob from maximum cold to maximum warm to verify proper range of motion.
    88236g12.gif

    Prior to installing the temperature control cable, turn the control knob and the cable indicator to the mid-points of their ranges
    Click to Enlarge

  2. Install the electrical connector at the following locations: blower switch, control assembly illumination bulbs and damper door switch.
  3. Install the vacuum harness connector for the function selector knob and tighten the mounting nuts until snug.
  4. Roll the control assembly into position against the instrument panel and install the four attaching screws until snug.
  5. Snap the console trim molding into position, connect the negative battery cable and check the system for proper operation

Jan 16, 2011 | 2001 Ford Mustang

1 Answer

How to replace a blower motor in a 1996 ford thunderbird lx


Removal
  1. Remove the glove compartment liner to gain access to the heater blower motor and blower motor wheel assembly mounting screws.
  1. Use a small screwdriver to remove clip retaining hydraulic damper strut.
  1. Remove four screws and remove the heater blower motor assembly and blower motor wheel assembly from the heater blower motor housing.
Installation
  1. Using a new seal, position the heater blower motor and blower motor wheel assembly to the heater blower motor housing with the flat side of the flange near the heater blower motor switch resistor (18591). Install the four retaining screws.
  1. Tape the heater blower motor power lead to the air inlet duct to keep the wire away from the blower outlet during installation.
  1. Install the heater blower motor and blower motor wheel assembly in the vehicle.
  1. Install the glove compartment liner.

Oct 07, 2010 | 1996 Ford Thunderbird LX

2 Answers

No heat 2006 pontiac torrent awd


your air damper or diverter may not be working.this is basically a mechanism that opens a flap by your heater core to control the amount of hot air that comes out.There is a rod that this flapper pivots on and if this rod is broken or the motor that operates it is not working you will either have heat all the time or no heat at all depending on which position it broke at.I know because my torrent has the same problem.To fix my problem they have to remove the dashboard to access the heater core which amounts to major $$$. I hope your problem is an easier fix. good luck

Mar 14, 2010 | 2006 Pontiac Torrent

1 Answer

Heater blower dosent chance from top to botom


I had same problem. I found the vaccum line from the main vac port on the intake completely deteriorated/dried up /burned /cracked. I replaced it with standard vaccuum hose - all positions are working now. Dampers are vacuum motor operated

Jan 10, 2010 | 1998 GMC Safari

2 Answers

Trouble on front blower ( air draft damper slow or no operating )


The Resister system on between nthe blower and the wiring controls blower motor speeds etc. That may be your problem. It is location is near the blower motor under the dash . It has a 4 wire plug connected to it. It has a couple of screws in the assembly.

Apr 07, 2009 | 1996 Chevrolet Lumina Mini

2 Answers

No heat


No Blower in Floor Mode
A customer arrives with a 1983 to 1995 Full Size Ford, Lincoln, or Mercury
automobile with automatic temperature control. If the complaint is no blower operation when
the floor mode is selected, the vehicle may have a problem with the thermal blower lockout
switch also referred to as the CELO (cold engine lock out switch).
The thermal blower lock out switch is located in the heater core intake hose. The two
wire switch has a thermal element with a small set of contacts, the contacts are open when the
coolant is below 120°F and closed when the coolant is above 120°F. The thermal blower lock
out switch also contains a vacuum switch, which applies vacuum to the outside/recirculate
valve when the system is in the floor position. When the engine coolant is below 120 degrees
and the selector is set to floor position, the thermal blower lock out prevents blower from
turning on and closes off the outside air during engine warm-up. When the coolant
temperature is above 120 degrees, and the selector is set to the floor position, the thermal
blower lock out switch allows the blower to operate and opens the outside air door.
In order to diagnose this problem, test the thermal blower lockout switch with the
engine at normal operating temperature (above 120°F). Unplug the wire harness connector
from the thermal blower lockout switch. Using a 15-amp fused wire, jumper the harness
terminals to test the switch. If the blower comes on, the thermal blower lock out switch is
faulty. If the blower doesn’t come on, look for an open between the control head selector and
thermal blower lock out switch.
In some cases the blower may continually run even when the engine temperature is
below 120 degrees. Unplug the thermal blower lock out switch and if the blower motor turns
off, the thermal blower lock out switch is faulty. If the motor continues to run, look for a
short to power between the control head selector and thermal blower lock out switch

Nov 04, 2008 | 1988 Lincoln Town Car

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