We have 2011 and 2014 diesel avensis. Both have Dual climate control. The 2011 model heater/aircon control has started malfunctioning recently. Basically passenger side works fine running from Lo to Hi temp when controlled individually. Drivers side only goes from Lo to about 16 and can fluctuate randomly when temp knob is used. I tried a Battery disconnect-no joy. Anybody see this before? Guessing replacing unit may be the solution.