Volvo XC40 2019 Owner's Manual page 215

NOTE
Climate comfort retention is switched off
when the car is locked from the outside to
avoid using residual heat unnecessarily.
Use of the function is intended to maintain
climate comfort when driver or passengers
remain inside the car.
There is a limit to how long climate com-
fort can be maintained in a cold climate,
which depends on the amount of residual
heat available.
Related information
Climate comfort when parking* (p. 212)
•
CLIMATE
213
* Option/accessory.