Yes, the thermostat is what cycles the water through the coolant system. When u first start your car cold, the thermostat stays closed, this allows the heat from the engine to raise the themperature of the engine to operating temperature. When the system reaches optimum operating temperature, the thermostat opens and allows the hot water from around the engine to move to the radiator and the water that was in the radiator to move to the engine. The water in the radiator is signigicantly cooler because the air from the fan(s) and from the forward motion of the vehicle moves the heat away from the radiator. When the cooler water from the radiator reaches the thermostat it closes to allow the engine to warm up to temperature again. This cycle continues the entire time your vehicle is running. Engines are more efficient when they operate within a certain temperature range. If the engine is too cold, the oil is less viscous and the ionization of the fuel through the fuel injectors is less consistant which in turn provides poor ignition within the cylinder exhausting unburned fuel. If the engine it too hot, the oil breaks down and the fuel prematurly ignites causing knock. Not to mention the fact that your engine will eventually melt.
More then likely you need to replace the Thermostat.
The temperature gauge on a car fluctuates because the car's thermostat is opening and closing. The gauge goes up when the thermostat closes and the gauge goes down when the thermostat opens.
Is vehicle actually overheating? Could be a bad temperature sending unit or gauge Check temperature with a thermometer If thermostat does not open vehicle will overheat
Thermostat is sticking.
Sounds like the thermostat is sluggish to react to temperature changes
Thermostat stuck in closed position Water pump not working Cooling fan not working Radiator plugged defective radiator cap
An automobile temperature gauge can fluctuate when the thermostat is opening and closing erratically. The temperature gauge can also fluctuate when the ground wire is loose.
A thermostat is not a switch it is a temperature gauge. It is powered all the time by the electronics in which it is being used.
Low Coolant? Weak Temerature sensor? Weak gauge Gauge working properly and recording the thermostat opening and closing as engine temperature fluctuates
if i understand your question, no such wire exists. the thermostat is not electronic. it opens and closes when the temperature causes the spring to expand or contract. what seems to be worrying you may be no more than a coolant temperature sensor that has gone bad. if your car hasn't overheated in 30 minutes at idle, your thermostat is fine. hope this helps you. The wire that you are probably talking about goes from the temperature gauge to the temperature sending unit which is on the passenger side between the fuel injectors etc. If your gauge isn't working and it is the needle type you can pull the connector off of the sensor (make sure you get the right wire, it's a single) and have someone turn the ignition on as you hold the connector to ground, the needle should move all the way up...if not the gauge or wiring is bad. ...........
Your thermostat is getting stuck, replace it.
It is located to the left of the thermostat housing for the temperature gauge, there is another to the right of the thermostat housing for the computer.