Question about 2002 Toyota Highlander

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Temp control knob was loose. Tightened it, but temp knob is inconsistent. How do I get it back?

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The knob hasworn of the teeth of the control knonb get some super glue glue the knob back on wait a 1/2 hour and your back operating and rate me so I will give you more information.

Posted on Jun 29, 2009

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2003 toyota highlander blower


try locating the physical tap that connects your heater hoses to the interior of the car. note what position that tap is in before and after you turn up the temp dial inside. whatever connects the dial to the tap may be damaged.

if the tap itself turns then the heater side of the blower may be blocked.

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All 3 are possible problems. A fuse is most likely the problem unless something got spilled leaked its way into the unit. Check all the fuses with a test light first before you try and replace the unit

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1. At night there is zero illumination for temp control knobs. It's completely dark. 2. Dash gauges very difficult to read at dusk and night time. (windows are tinted dark) by previous owner. doesn't go...


The HVAC control, if it is the Electronic version, you might want to try unplugging, and plugging it back in. Remove the center trim panel by opening the ash tray, and pulling on each corner. The trim panel is held on with 6 spring clips ( 3 on each side ).
6e3d291.jpg
When you have the panel loose ( don't move too far, the HVAC controls and the Passenger Airbga Deactivated light are still hooked up ), un hook the 2 cam over connectors ( circled in blue ). After hooking back up, the HVAC will be off, you need to manually turn it on.
2. The dash lights could be the wrong bulb, or some could be blown out. F150online.com -> Technical Articles section has a thread on removing the dash to change the bulbs.

These are the 2 starting points.

Aug 08, 2010 | 2006 Ford F-150

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2005 RX8 heater is blowing cold air. Fluids are topped up.


You need to repair the heater core with a soldering gun.

If you do not have heat, or only have heat, IMHO it is most likey the AC/heater control unit. This is the part which has the AC/heat control buttons and knobs.

Easy Diagnosis:
The easiest way to verify this is to turn on the radio, press and hold the power on/off button and press and hold the scan-up button for a second (full second). The word "A/C TEMP" should appear on the left of the display and a number from 0 to 16 on the right. I suspect yours will have the number 0 (or 16 if heating only problem) displayed no matter where you turn the temperature control knob. If this is the case you could turn the temp. knob to full heat and see if it goes to 16 after pushing down or to the right on the knob.
In a working system, the number moves evenly in increments of 1, from 0 to 16 as you turn the temperature knob.

Easy Fix:
I was able to take mine out and solder 3 loose connections to fix it.

The beginning steps are the same as for any radio removal procedure and check for loose connections.

Dec 14, 2009 | 2005 Mazda RX-8

2 Answers

I can not get the temp knob to transfer form cool


most likely you'll have to replace the plastic tab on the back of your controls its easy to do. You'll have to take out the radio and temp. Control unit you'll see where the cable hooks in its probably broke. For a temporary fix you can unhook the cable at the floor. Its on the drivers side by the gas pedal.

Oct 20, 2009 | 2002 Nissan Altima

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A/C will suddenly send out heat. Fiddling with knobs seems to help. What's wrong?


You have a broken wire connection between the temperature control knob and the circuit board behind the center dash console. Vibration causes the failure and once the control knob gets loose the solder connection fails.

For someone that knows how to remove the dash unit and can re-solder a couple of new wires this fix should take no more than 1 hour. Make sure that you apply loctite to the heat control knob spindle nut when you re-assemble it.

The dealer quoted me 750 dollars to fix this issue and I found out that it's a common failure for this year. I fixed mine virtually for free but it took some tools and about an hour of my time.

Jun 02, 2009 | 2005 Toyota Highlander

1 Answer

2002 Toyota Highlander AC main control


Before tearing out the AC control, does the temp knob feel loose or wobble alot more then the fan knob? If so pull the temp knob straight off. Look at the small nut around the shaft the knob came off of. Its common for them to come loose. Just tighten it up some and reinstall the knob. Your temp will work normally now.
This fix is for the manual system not the auto ac system.

Mar 28, 2009 | 2002 Toyota Highlander

2 Answers

Dash Control Unit Replacement


You can save a LOT of money by fixing it yourself.

All that is wrong with the knob are broken wires from the knob's PC board to the main PC board on the AC control.

All you have to do is remove the AC main control, take it apart, and resolder the broken wires from the PC board with the knob on it, to the main AC pc board. There are 3 wires, any number could be broken.

If you take it apart and solder the broken wires, this WILL fix your issue. Just make sure you put the wires back exactly where they go.

A FIXYA rating (4 blue diamonds) would be most appreciated for my assistance.

Mar 21, 2009 | 2002 Toyota Highlander

2 Answers

Temperature control knob turns but doesn't change temp.


the heater control valve is visible through the speaker cut-out; it's at the end of the plastic heater control rod, inside the car - not on the other side of the firewall! It's connected to the valve with a plastic "universal joint".

Check that the valve is actually being turned by the rod. The connection might not be good (pulled apart or broken), and or the valve might be stuck.

Saabreur

Mar 14, 2009 | 1991 Saab 900

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