Overworking the engine. Take big hills in a lower gear.
the coolant temperature switch
Pressurised coolant boils at a higher temperature than unpressurised
Coolant temperature sensors are usually located on the radiator.
The Fiat Punto has a radiator which receives coolant in order to keep the temperature down. The diagram of this radiator can be found in the owner's manual.
In most vehicles there are different temperature readings, especially in newer vehicles. The TEMP light usually means the Coolant temperature in the radiator. If a warning light comes on it usually means your vehicle is overheating and should be checked out by a mechanic asap.
Radiator stores engine coolant for circulation throughout the engine The radiator is placed at the front of the engine and exposed to the atmosphere to keep coolant cool to maintain proper engine temperature
The radiator cap could be the cause of coolant reservoir overflow or backup. Have the cap checked to see if it is bad.
If you have a 1999 Passat V6, the coolant temperature sensor is located in the lower radiator hose.
located at the bottom of radiator
The coolant level is checked at the coolant tank in the passenger front corner of the engine compartment . The coolant level should be up to the cold mark when the engine is cold . The radiator should be full so its covering the top plate .
The coolant temperature sensor is the two wire sensor near to where the upper radiator hose attaches to the engine.
Because the motor is running to hot try flushing your radiator and putting new coolant in.