[tfrancis]

You guys are geniuses! Exact same problem ('01, intermittant heat, found 2 ribbon wires were broken, etc.).

I had two big differences though: 1) all knobs were tight (but the wires were broken anyway), and (2) after fixing the broken ribbon wires I get perfect heat on the passenger side, but only cold air blows on the driver side.

I would have guessed that there would be one servo valve on the heater core would work for both sides at the same time - It does not make sense to me that Toyota would have gone to the trouble of installing a separate valve for each side if the two sides can not be adjusted separately.

In any event, I have to get heat to the driver's side somehow. I get the same amount of air blowing on both sides, but only one side gets any heat. I wonder if there is pair of flaps on the heater core that each open on command, and in my case one is not getting a command? If this was the case, I wonder if I could override the driver side flap to let the heat through - I would not think it would be a problem, but is it possible to get at it?

Does anyone have any ideas?

Wizzer - do you still have that heat control head part for $75? (it seems that I might have to replace the assembly to fix this problem after all, and the wreckers are now asking $250 for the part)

Tim