Iskender, have you tried this; Leave the driver's side connector off the 'duovalve'. The valve should go to 'OPEN' (normal failsafe position). IF it does not, you have a clog in the return line somewhere OR a stuck valve. That should give you a more complete picture for that section of the system. IF it does get the driver's side hot (very hot if car is fully warmed up) then you may be getting a 'signal' to the valve to 'CLOSE' it. Do this at least twice (make sure the car is cooled down completely before doing the second try) to make sure it isn't an anomaly. Come back in to let us know your findings.


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