* The temperature gauge does not move when the engine is turned on. This is the most obvious sign that the heat sensor is bad. The temperature gauge should move up as the engine warms up, and down as the engine cools down.
* The engine overheats. If the heat sensor is bad, the engine may overheat because the sensor is not sending the correct signal to the engine's computer. This can cause the engine to run too hot, which can damage the engine.
* The air conditioner does not work properly. The heat sensor also plays a role in the air conditioner. If the heat sensor is bad, the air conditioner may not work properly because the sensor is not sending the correct signal to the air conditioner's computer.
If you suspect that the heat sensor is bad on your 1996 Cadillac, you should have it checked by a qualified mechanic. The mechanic will be able to test the sensor and determine if it needs to be replaced.
Here are some additional tips for diagnosing a bad heat sensor:
* Check the wiring to the heat sensor. If the wiring is damaged, the sensor will not be able to send the correct signal to the engine's computer.
* Check the coolant level. If the coolant level is low, the heat sensor may not be able to get an accurate reading of the engine's temperature.
* Check the thermostat. If the thermostat is stuck open, the engine will not be able to get hot enough, and the heat sensor will not send the correct signal to the engine's computer.
