here is my experience
driving towards KLIA at speeds of 160, temp went up to the redzone and air-cond kick off after just 5 minutes
starting up the car in the morning takes a bloody long time to heat up
was suspecting that my thermostat jammed
so go buy new thermostat for RM 25 at spare part shop
went and install it and to my horror, the previous owner of my car took away the thermostat and only left the skeleton there
after installing the thermostat, tried my luck towards KLIA again
constant 190, no problemo
temp constant at slightly below the middle bar
btw, me driving putra