Question about 2004 Toyota Highlander

3 Answers

Climate control not working properly

Too cold w/ a/c, can't adjust properly. Can't adjust heat properly either. Told by dealer that it's a " Header", the center control, for temp, that's bad at $600-700 to replace w/ min. labor. Would like to replace myself with used parts. Any info where to find and what it's called? Located in SE PA

Posted by on

  • 8 more comments 
  • ilikebeer Oct 29, 2008

    Manual A/C. Happens w/ heat and A/C.

  • Rees901 Nov 12, 2008

    same problem with my 2002. wont switch to heat. got an estimate of $900 to replace last winter, which I couldnt afford at the time. the repair man tinkered with it and set it on heat which lasted me until the summer when i had to switch it back to cold. now with winter arriving i'm faced with the same prospect. if you figure out a cheap way to repair it, please share.

  • martyn_james Nov 20, 2008

    I'm being quoted well over $1000 to fix this same problem; found a number of similar reports on the web

  • biggunn Nov 25, 2008

    I do have soldering skills how can i fix it??

  • Anonymous Dec 23, 2008

    I have a 2004 Highlander. I have a similar issue with the blower changing to cold air even when I have the temperature knob in the red zone. If I twist the knob back and forth a bit, the heat comes back. Sometimes I have to set the dial all the way to hot to get heat started. I thought maybe the thermostat was cutting in and out. Perhaps my problem is a worn contact in the knob?

    Any advise?
    No Three Putts

  • mabuski Dec 31, 2008

    I also have had the same problem. Zero degrees and no heat, I used to ba able to twist the knob a few times to get it to work again, but this time there was no fixing it this way. I was quoted $1000 to repair at the Dealer.

    they are going to fix it but I want to know if there is or was anything I could have done to not pay $1000. I need heat.

  • deroberts11 Jan 07, 2009

    My climate control doesn't work properly in my 2004 Highlander either. It will be putting out heat and the next thing you know it has switched to the air conditioner. That's not a good thing when you are depending on the heat of the defroster to keep the snow and ice off your windshield. I find if I leave the knob off and wiggle the shaft it will usually switch back to heat. The heat and air conditioner has never worked properly in this vehicle. Toyota admits this has been a big problem and offered to fix it at a cost of $800.00! Why not recall the faulty part???

  • pmichell6216 Mar 10, 2009

    Having problems with temperture adjusting from hot to cold. Just found out its a temp control switch at the tune of 1000.00$. Any suggestions on how to fix this for less money.

  • Toyota Ed May 11, 2010

    Question: is it AUTO A/C or Manual?

    And, do you have soldering skills?

    I am in PA, also...SW

    Pls comment back

    Toyota Ed

  • Alex
    Alex May 09, 2012

    These guys are fixing it for a very reasonable price and in a timely manner:



3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

If you're willing and able, you can fix it yourself. you have to pop off the big plastic frame. then 6 bolts to remove the unit. then unplug. then four screws to remove the radio, you repair the unit by re-soldering the ribbon cable or removing and replacing it with single wires. the ribbon cable is between the knob's little circuit board and the main circuit board. that's it.

or you can find more detailed instructions at

Posted on Jan 14, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Toyota Master
  • 1,861 Answers

Sorry about the delay, the site did not update your response to me. Send me your e-mail addresses at; I will send you detailed instructions on how to rectify your situations, biggunn, martyn and rees.
Thanks for choosing FixYa for the solution to your situation.

Posted on Dec 23, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 42 Answers

I have had limited success in removing the knob and tightening the 12 mm nut on the shaft, but usually the damage to the potntiometer has been done and the switch will have to be replaced

Posted on Dec 20, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

3 Answers

When front air is on rear heat always

If you have owners manual check that your climate control settings are as you expect them to be, if that makes sense. Some on Fixya do not realise they gave climate control , they think they have normal A/C and try to correct chimerical problems. Please check and repost

Jul 03, 2015 | 1997 GMC Savana

1 Answer

My 2002 volkswagen passat is blowing cold air when I put the heater on. I took it to a dealer and they said that it could be because my car has a sensor that detects the temperature in the car and when its...

Your brother's mechanic may be correct but you may want to double check if you have a bad flap which opens / closes the access of coolant thru your heater hoses to your heater core. This component is called an actuator which may be defective.

Jun 21, 2017 | 2002 Volkswagen Passat

1 Answer

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital...

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital temperature on the climate control is not correct. When it states that it is below 30 degrees on the ext and it is warm outside the air wont be cold. Once it starts going above 30 degrees the air gets colder. Today the blower stop working all together. Was told it maybe the climate control unit was bad. You can hear the door opening/shutting when you switch the temp from cold to hot. But there was no heat blowing out whatsoever in the winter time. Could you please give me your opinion on whether or not it is the climate control unit or something else?

Jul 11, 2011 | 2000 Pontiac Grand Prix

1 Answer

Chevy silverado z-71 driver side heat not working

If you have duel climate controll and by this side you mean the drivers side then will tell you that I ended up replacing the controll unit and fixed the problem,When mine would go from cold to hot I would turn off the key then it would go back to normal until I hit a bump or adjusted the heat slider. there are two one on each side of the trans hump.I just went to dealer and asked for a printout of the parts break down.It is way up under there from what I can remember.Well hope this helped a little any way.

Jan 08, 2010 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

I NEED TO FIND THE KEYLESS ENTRY CODE & heat blows cold intermitt

entry code need to notify a ford dealer either air control baffle stuck or not responding or heat control at heater core not opening / responding

Nov 18, 2009 | 2004 Ford Crown Victoria

1 Answer

The dual ac/heating on my 2003 Tahoe is not working properly.The passenger side will only produce hot air when the selector for the passenger side is in full cold. The driver's side works fine. What do...

I have a similar problem except mine started today changeing from a/c to hot air. I had the system checked at the dealer no leaks etc...I was just told that it could possibly be the climate control/ control switches in the in the dash. Yo could have teh same issue.

Jul 01, 2009 | 2003 Chevrolet Tahoe

2 Answers

1998 Volvo S70 2.0L Air conditioner not working correctly

This may be one or two different problems. One could be the climate control unit itself. Surprisingly the problem with the air not changing the source will likely be remedied by a reprogramming by a Volvo dealer. Defrost is the delfault outlet if there is a problem with that system. As for the dial not having detents and the cold instead of hot air in the pass side, that could be programming, a disconnect with the heater door for the passenger side or it could be the control unit. 98 is a difficult year to diagnose and the dealer is likely the only one who can properly diagnose this car. The download at the dealer is an inexpensive fix. If there is a mechanical problem within the air system that could prove more costly. I'm not sure how much the control unit for the climate control system, but there are usually quite a few on ebay. Good luck and I would suggest visiting the dealer first for this one as it is the least expensive fix and could very well be the only problem.

Feb 20, 2009 | 1998 Volvo S70

1 Answer

Heat works on driver side, passenger side blows cold air.

Did you check your coolant level or was it low and you added to it at some point? If so the system my need to be bleed or worst case the thermostat is going bad.

Jan 02, 2009 | 2001 Jeep Grand Cherokee

3 Answers

Heat works on driver side, passenger side blows cold air.

Blend door for passenger side or blend door motor has failed. Very big job to remove dash and work on it. Except the door motor is accessable from the glove box.

Oct 21, 2008 | 2002 Jeep Grand Cherokee

Not finding what you are looking for?
2004 Toyota Highlander Logo

2,316 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

77169 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22258 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8725 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides