[racer71]

Just joined this community last night, Feb 5th about 7:00 pm. Found the a/c & heater control problem on my `05 Highlander thru Google search. This forum, with pictures, had the exact same problem I was experiencing. Had purchased the Air Mix Servo from a dealership here in the LA area for $ 160.00 because I could see that it was dancing all over the place regardless of where I had the heat knob set. So, it would go from hot to cold to hot to cold randomly. When I'd go around a corner, it would get hot. Thought it was the air mix servo under the dash. When I plugged in the new one late yesterday afternoon, it did the same dance. This told me it was the control module on the dash that was sending the servo confused signals. Sooo, I started searchin the internet for a solution. Stumbled across this site and joined. Found the exact probem, with pictures about 7:30 pm.. I had the dash apart by 8:00 pm and found the broken wire probem right away. Cleaned out the ribbon cable and solder. Found some 20 gauge wire I had and soldered in 3 new wires, then siliconed over the soldering. Re-installed the switch units and put nail polish on the threads of the pots to prevent future loosening. Reinstalled the whole thing this morning and it works like new ! Many thanks to your website and contributors, you just saved me about $ 850.00 to have Toyota do a parts swap that cost me nothing. I will return the air mix servo ... probably with a restocking charge, but still cheap fix for potentialy expensive repair. Thanks again, I will keep watching and posting with any solutions that I come up with.

Racer 71