Have you checked the cooling fan relay? ? This is the child's wooden block size relay installed in the fuse/relay box in under the hood. If it is bad the fan will not come on even if all the other sensors and components of the system are functioning. Also, This cooling fan relay draws a lot of amperage which causes it to heat up. On my '92 SC2, I have learned that the contacts of the relay have become so hot from the high current they carry that the fuse box sockets overheat and deform. It became necessary for me to open up the upper and lower halves of the fuse box and install new conductors to restore good contact with the relay pins. If you find that your cooling fan relay pins are discolored and the plastic housing is slightly deformed around the pins, you are likely haveing a similar problem. For a while I was able to just slightly twist the pins of a new relay using a pair pliers so that they would make tighter contact in the deformed sockets of the relay box. Hope this helps, JB
Cooling fan should come on when coolant temperature exceeds 235 degrees Fahrenheit or A/C or defroster are turned on
Cooling fan is designed to come on only when A/C, defrost, or engine temperature exceeds 235 degrees
Engine coolant temperature switch/sensor
The sensor is threaded into the coolant passage in the back of the cylinder head.
on the right side of the engine
Start by replacing the Engine Coolant Temperature Sensor
Engine Coolant Temperature Sensor.
Sounds like your cooling fan relay is shot. Ron J.
The guage on the dash uses the ONE wire sensor... This is located in the block near the drivers side. Eric First check to see if you have coolant in the radiator. If there is no coolant you will not get any reading from the temperature sensor. If there is coolant then change the temperature sensor.
Low coolant? Cooling fan not working? Thermostat not opening? Cooling system air bound? Water pump not circulating coolant? Plugged or restricted radiator? Defective radiator cap?
Refer to the link below
You fill the cooling system through resevour, it should have a cap that screws on and says DO NOT OPEN WHEN HOT.
1 and the coolant temp sensor is located in the head under the upper rad hose
You don't "fill up" the water pump. The water pump is just a pump that moves coolant throughout the engine cooling system. You add coolant at the radiator or the coolant recovery tank.
In most cases the single wire sensor runs a temp gauge or temp light. The double wire sensor feeds info to the vehicle's computer and operates relays for the cooling fans. This may or may not be the case for your Saturn.
Common for a cracked coolant temperature sender. Although there are many other possiblilites. Don't wait, get it figured out ASAP.
The 1999 Saturn S-Series engine heats up the coolant, the thermostat valve opens and the coolant circulates between the radiator and the engine. Then the radiator fans turn on to cool it back down. The fans are also turned on when the air conditioner is turned on to aid in cooling the radiator and the air conditioner condensor.
procedure on how to bleed air out of coolant system on 97 saturn ls
The light you are describing indicates low coolant level in the coolant reservoir.
The reason the coolant light is on in a Saturn vehicle likely indicates a low level of coolant. Filling the receptacle should fix the issue.
no, it's on the reservoir. Yes, the radiator "system" has a pressure-release cap located on the plastic coolant fill bottle. This bottle is an active part of the cooling system, and is where you add coolant to the system
The computer with input from the engine coolant temperature sensor.
Has the engine coolant temp sensor ever been changed.
If the temperature gauge is rising when you stop at traffic lights then your electric cooling fan is not running. Most likely need a new temp. switch for the fan.
Causes of overheating: Low/no coolant; cooling fan relay switch/sensor faulty; cooling fan motor faulty; thermostat stuck in closed position; water pump faulty.