Forester air con question 2016 MY

[Guest]

Today being one of those rare days of bright sunshine and 20 degrees C temperature, the inside of the car was, as you can imagine, sweltering.

After a 5 mile drive, brief stop, then 5 miles back again (about 30 minutes total), the air conditioning was still blowing out only mildly lukewarm air rather than the icy blast I hoped for.

Temperature control was set to minimum, FULL AUTO.

Am I expecting too much - how long would it normally take for the aircon to kick in properly?

Do I need to have it checked ?