If it is a new model laptop, it will be using a cooling paste. Mine had this problem and the technician reapplied cooling paste. It was last year. it is now heating up again. There is no fan inside nowadays.
This one is an old one, some 6 years old. This model has a fan, I got it changed, some 2 years back, for some 2K. And I am not willing to spend this much for this old lappy now. I have a plan to go for a new one, but not at this moment, so looking for some other alternative, for this summer season.
Though I have one more lappy that is 3 years old, (using side by side) and so bit reluctant to spend on repairing and spares. (I have already spend some 6k (may be more, do not remember exactly) in last 1 year for one or other problem, screen changed, RAM changed, hinges etc etc)