I have a 2000 mercury utility mountaineer and my ac is not cooling like it was. on 2000 Mercury Mountaineer

First of all I have had an ac man check it and it shows to be nothing wrong with the ac sys.
Now when I got this vehicle the heater did not work so I went one winter without it and the ac worked fine and cooled good.
Now the following year one day I was missing around with the controls and the heater started working good blowing hot air,
but then shortly about 10 min later the clicking noise starts and I shut the heater off. Now my ac does not blow cold and I think the heater still works. Can you give some input on this perhaps it is that actuator problem?

Asked by for the 2000 Mercury Mountaineer
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