how do you know if your selenoid is bad does it make a noise? on 2002 Jaguar X-Type

a problem i had 1st was with my a/c the drivers side vents were barely coolto warm and the passengers side blows really cold. working on that now spmeone said check the blend door. doing that now. im not sure if it startd making the noise before the ac problem or not.

Asked by for the 2002 Jaguar X-Type