Bad Gauge---Electrical short---Bad fuse---Bad sending unit---loose or bad electrical connector to the gauge. Bad sensor. Had a faulty gauge on my 97 Ford Ranger. I changed the thermostat and the sending unit and the temperature sensor it started wotking beautifully.
Bad groung and or bad sending unit.
Most likely a bad sensor/relay
Could be the temperature sending unit.See "Related Questions" below for more specifics...
Temperature.
StUck in open position
change in temperature causes change in pressure
The temperature sensor is probably bad
A faulty temperature sensor, a wiring issue, or a blown fuse could cause a temperature gauge to stop working. It could also be due to a malfunction in the gauge itself.
bad temp sender usually. Bad gauge rarely.
Could be the coolant temperature sensor.
Urine is the same temperature as the body it leaves. If the person has a fever, the urine will be a higher temperature. This is why there is a temperature gauge on the outside of a sample bottle.
A temperature gauge, that always read the maximum temperature, is usually not connected to the temperature sensor. The wire between the gauge and the sensor must be broken.