air trapped into cooling system - this can be ONLY happened if you lose some coolant from your previous overheating and pushed some coolant out of the system.
But you said you have full coolant ( I assume you knew how to check it: not only at reservor, but also make sure in radiator it is full as well - Warning : never open rad. cap when hot )), so if you never topped up your coolant and your coolant IS full, then you ruled out the possibility of air trapped in .
(你如果英文ok, 我大段的,英文打的快些, )
But you said you have full coolant ( I assume you knew how to check it: not only at reservor, but also make sure in radiator it is full as well - Warning : never open rad. cap when hot )), so if you never topped up your coolant and your coolant IS full, then you ruled out the possibility of air trapped in .
(你如果英文ok, 我大段的,英文打的快些, )