@ Daniyal_scorpio
Assalam-0-alaikum
Your car fan is auto or direct.plz check.
Possible cause fan switch faulty.
Termostate switch faulty.
Meter temperature gauge faulty.
But in my opinion there is some problem in the wiring of termostate gauje.
Plz concern with good electrition.
When fluctuating it is more good if u plz send me a clip on whatsup to me
03224450322 sadat