There are 2 ways to pre condition
My XC 60 T8
1/ Parking Climate I use this when in garage and plugged in. If I recall it also depends on the outside temperature of the car, compared to inside, if close it thinks it is not worth turning on (correct me if I am wrong someone) as sometimes I get failed message.
2/ Remote Start) I assume this is the engine, so not this one in a garage (If I recall this will not start if you have a T8 and it is plugged in.
But in general it works for me, I am sure they would be other reasons why if certain criteria's were not being met etc.
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