Tip & How-To about 2005 Toyota Highlander

HIGHLANDER "NO-HEAT" CONDITION (W/O Automatic Air)

Does your Toyota Highlander have no heat?
Here are two possibilities
The retainer nut for the temperature control is loose, which leads to a wire that is broken from the temperature control sub-circuit board, to the main circuit board.

If the retainer nut is loose, the unit can be repaired. This will entail removal of the heater control from the dash, disassembling it, identifying the broken wire, and resoldering the broken wire back in place.

If you are not skilled in disassembling the dash and the heater control, and not skilled in soldering, this job is best left to a professional. The alternative ti repairing the broken wire is costly. The replacement control is roughly 900 dollars, plus installation. A qualified technician can repair your control in less than 2 hours.
If you need further info, please post a question on the FixYa site.

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1 Answer

The heating controls don't work on my 2002 Toyota Highlander, 4 cylinder SUV.


Hello. Welcome to FixYa. Please allow us to assist you.

You have one of two possible problems.

1) The retainer nut for the temperature control is loose

2) A wire is broken from the temperature control sub-circuit board to the main circuit board.

If the retainer nut is not loose, the unit can be repaired. This will entail removal of the heater control from the dash, disassembling it, identifying the broken wire, and resoldering the broken wire back in place.

If you are not skilled in disassembling the dash and the heater control, and not skilled in soldering, this job is best left to a professional. The alternative ti repairing the broken wire is costly. The replacement control is roughly 900 dollars, plus installation. A qualified technician can repair your control in less than 2 hours.

If you need further assistance, please feel free to get back to me.

Thanks for choosing FixYa today.

Nov 11, 2010 | 2002 Toyota Highlander

2 Answers

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


The nut that holds the middle knob has gotten loose and the knob (which is probably loose) has caused a wire behind it to break. I found the fix on the internet with details and pictures and all you need is to take the cover off and solder the broken wire back. I don't know where the website is now but search "toyota highlander blows hot and cold" and you might find it. Good luck. don't let dealership put a new control panel in.

May 10, 2009 | 2001 Toyota Highlander

1 Answer

Heater/AC control no longer allows change in temperature


You have one of two possible problems.

1) The temperature shaft retention nut is loose behind the knob

2.) The wires to the potentiometer part of the temperature may be broken.

Either one is common to this vehicle. The replacement of the AC controller is about 900 dollars. If the wires are broken, they can easily be reattached to the circuit board via soldering. What you would have to do is remove the control box from the dash, and disassemble it. Once the unit is apart, there are 3 wires from the temp knob to the circuit board that need to be re-soldered. The unit CAN be repaired, as opposed to the expense of replacing it.

Apr 23, 2009 | 2006 Toyota Highlander

2 Answers

no heat 2005 highlander


try pulling off the temp. control knob and tightening the shaft nut.

Dec 21, 2008 | 2005 Toyota Highlander

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