Question about 2007 Suzuki XL-7

4 Answers

Suzuki XL-7 (2007)Heater control

The main heater control holds the temperature either at 16°C or 31°C. No adjustment possible. The one in the second row seats works perfectly. Went to dealer 3 times and they can't find the problem. Help!

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  • cindylapierr Jul 17, 2009

    Didn't want you to think we thought your solution wasn't good. We do have difficulties with the dealer to look into the problem. We wanted to have a few advices before we went back, just in case. Thanks for the advice. We will be back to tell you what really happened.

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4 Answers

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  • Suzuki Master
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This sounds like you have a problem with the air temperature control electric blend door actuator motor, this is what controls air temp, the part moves the door that sets between the heater core and ac evaporator core to mix the two hot and cold air sources for the desired temp at the ac or heater outlets. this part is buried deep in the dash and very difficult to replace as the dash must be removed to get at it for replacement.

Posted on Jul 14, 2009

  • yadayada
    yadayada Jul 15, 2009

    how do u know this is not the problem?, just to educate u this is the most common cause of air temp control issues no matter what the car line, they all use electric actuators (known as stepper motors) for the blend door. I have been an automotive AC expert for 30 years now and this is what I have seen most often followed by the AC control head in the dash.

  • yadayada
    yadayada Jul 15, 2009

    I would also like to here what you think the problem is since you rejected my advise with no comment

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  • Master
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Hello Cindy. If you drive to any autozone they can put your car on their scanner and should be able to pinpoint the problem. Although I am not a Suzuki Tech. I suspect that there is a separate relay for the front and the rear heaters. My money goes on replacing the relay that controls the front or main heater.

Posted on Jul 15, 2009

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  • Master
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Heater control unit needs to be checked .the heater control has a thermostat for the heater only. that thermostat needs to be checked and replaced.

Posted on Jul 15, 2009

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  • Master
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On the newer models... The heater core always has maximum water flow going through it. There is a door in the HVAC system that either entirely isolates the core from the air flow or diverts varying amounts of the air through the heat exchanger.
The door is operated by an electric stepper motor; the knob is technically a position sensor.
------------
Some heater/defrost controls are mechanically controled and some are vacuum actuated. Look under the passenger side dash and see if you can locate the means by which the flapper is controlled. Normally the flapper just redirects the heated air from the rotating fan to eith go out the vents or up to the vents in the defrost. Most mechanic units (attached by cables from the dash control unit) do not break or wear out. The vacuum operated ones sometimes the small vacuum hoses that attach to a solenoid come off or get brittle and loose their seal against the plastic tips. If you can work the dash controls while you look under the dash and try to see how and why the flapper is not moving, then maybe you can ascertain how the flapper is actuated. Last resort os to try to remove the in dash control unit. It will either have the mechanical cables attached or vacuum lines attached to it so be careful when removing. Once you control the flapper in the air box, then you norally can redirect the air to where it needs to be. Look for a cracked vacuum line by the master cylinder. There are several that interconnect which feed through the firewall and into the dash that supply all of the dash vacuum
------------
keep updated.thanks.

Posted on Jul 14, 2009

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Posted on Jan 02, 2017

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how to remove it is a very long answer.
read the FSM on HVAC
or login to alldata.com see HVAC chapter, and read. it.
anyone can, not just me.

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  21. Remove the two screws that secure the blend door actuator to the rear heater-A/C unit housing.
  22. Pull the blend door actuator away from the rear heater-A/C unit housing far enough to disengage the actuator output shaft from the blend air door pivot.
  23. Raise the blend door actuator far enough to access and disconnect the rear HVAC wire harness connector for the actuator from the actuator connector receptacle.
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Sounds like the air blend door is not opening to let heat in.

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POSSIBLE LOCATIONS OR CAUSE OF OBSTRUCTED COOLANT FLOW
If coolant flow is verified and the heater floor outlet temperature is insufficient, a mechanical problem may exist.

POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT HEAT
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If heater floor outlet temperature cannot be adjusted with the heater-A/C control temperature control lever, one of the following could require service:

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Heater temperature control cables to blend door and heater water valve--adjustment:
WATER VALVE CONTROL ROD

See Figure 8
When adjusting the water valve control rod, disconnect the temperature control cable at the air mix door lever and then adjust air mix door control cable. Next, adjust the control rod. Reconnect the temperature control cable and then readjust it.
  1. Push the air mix door lever in the correct direction.
  2. Pull the control rod in the direction shown (in the accompanying illustration) until there is an 0.08 in. (2mm) clearance between the ends of the rod and link lever. Connect the rod to the door lever.
jturcotte_114.gif

TEMPERATURE CONTROL CABLE
See Figure 9
Move the temperature control lever to the cold position. Push the cable sheathing and the air mix door lever in the correct and then tighten the clamp. Verify proper operation.

jturcotte_115.gif

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