This kept happening with mine so i just let it do its thing for a while and noticed that it eventually stops and then just keeps working to maintain the temp as set.
I only had ordinary air con on my old car so it was up to me to turn it on and off. Forgot at first that this car has climate control and likes to do its own thing
But the really good news is that in last few days the climate control has been working to cool my car rather than heat it for the first time since i got it. Roll on summer
