The temperature sensor is probably bad
An inoperative temperature gauge will not alter how an engine runs, but the operator will not know if the water temperature has risen above normal without a properly working guage.
It sounds like a bad Temperature Sensor or the Gage It's self.
Overheating due to low coolant, inoperative fan, restricted radiator, etc.Overheating due to low coolant, inoperative fan, restricted radiator, etc.
i have a 1999 ford escort zx2 and its running hot, changed out the thermostat thermostat cooling sensor, checked the fan and it works, the temperature gauge in side the car still showing hot, let thecar set over night and the gauge still shows hot, what else could be wrong
the three possible problems to this question are . your temperature sending unit is defective ,you could have problems in your wiring harness, or your temperature gauge is inoperative. I am a licensed mechanic and i have found your best place to start is to make sure you have input power to the sender and sensor and output to the gauge and or light in the system .If you have no output but you have input chances are your wirings fine and the sending unit or temperature sensors bad , you'll have to refer to the proper manual and check resistance.If you have output to the gauge and you have the proper voltage reference at the gauge ,chances are the gauge could be defective. The most common problem is a defective sensor though.
Most likely, the temperature gauge's connection is loose. It is usually on the thermostat. An inoperative temperature gauge will cause most check engine lights to come on.
No. The diaphragm on the pressure gauge is leaking, and the gauge will soon be inoperative. Have the extinguisher serviced and repaired.
Temperature.
change in temperature causes change in pressure
StUck in open position
The normal causes of an inoperative fuel gauge is the sending unit in the tank. Since the truck is 15+years old you might as well replace the fuel pump when you have the fuel tank removed.
The temperature sensor (sends coolant temp to the PCM) is located in the top of the thermostat housing. The temperature sender (sends coolant temp to the gauge) is located in the bottom front of the same housing.