Two things. Check the thermostat, or change it. 2nd, air lock in the system. And, a possible 3rd, the valve that opens the air vent might be jammed.
I had this problem with my 106 and it turned out that the thermostat was broken.
maybe cuz its low on coolant
Bad sensor? == ==
Either the coolant sensor has failed or there is a bad connector somewhere or the dashboard sensor circuit has failed.
If coolant full could be a bad sensor
The sensor in the reservoir is probably bad. It is located in the bottom of the reservoir and fairly easy to change.
Add coolant to the full cold line on the coolant reservoir when engine is cold.
An overflow container prevents coolant loss. As coolant heats it expands. Without the tank, excess coolant would be forced from the radiator and be dumped on the ground. As coolant cools it is drawn back into the radiator so it always stays full.
The coolant level sensor is bad
Radiator full and coolant recovery tank filled to mark Radiator full and coolant recovery tank filled to mark
you add coolant untill it is full ?
It could either be your thermostat or your waterpump. In either case you could have full coolant levels but with a faulty thermostat or water pump your car will still over heat. I would start with the thermostat because those are usually the cheapest and easiest to fix.