Car overheating cooling fans not turning on new thermastat and new engine coolant sensor

Cooling fans not turning on, check to make sure the cooling fans are running when overheating occurs. Not enough coolant in the cooling system, check the coolant reservoir make sure the coolant is at at the maximum level when combustion engine is completely cool,if your coolant is low add coolant to the maximum level. (1)Start combustion engine, let it warm up but not over heat. Turn off combustion engine, when it cools completely the coolant reservoirs level will be lower . Add more coolant and keep repeating (1) until the coolant level stays the same after combustion engine completely cools down.Sensor that tells the cooling fans to turn on defective. Non functioning thermostat. Broken impeller inside Water Pump. Clogged radiator. Clogged water jackets in combustion engine. Broken drive belt. Radiator has something blocking the cooling fins(possibly a plastic bag that went against the cooling fins when driving)

Are the cooling fans coming on ? What year an model Kia ? Most all newer vehicles have electric cooling fans turned on by the ECM / PCM -engine computer ! The ECT - engine coolant temperature sensor tells the computer how hot the engine is an when it reaches a certain temperature the engine computer supplies a ground to the cooling fan relay that turns on the cooling fans !

CHECK COOLANT LEVEL MOST NEWER VECHICLE DONT HAVE RADIATOR CAP YOU HAVE TO POUR COOLANT IN THE COOLANT OVERFLOW JUG THE COOLANT WILL GO TO RADIATOR. IF THE COOLANT OVERFLOW JUG EMPTY ADD COOLANT UNTIL COOLANT LEVEL STOP DROPPING AT STAY AT FULL COLD MARK.IF COOLANT OKAY,NEED TO REPLACE THERMOSTAT AND COOLANT OVERFLOW JUG PRESSURE CAP. IF ALL BEEN DONE. MOST OF THE TIME WHEN CAR OVERHEATING WHILE MOVING. RADIATOR CORES STOPPED UP OR RADIATOR GRILLE DIRTY OR RESRICTED.ENGINE BLOCK COOLANT PASSAGES CLOGGED AND HEATER CORE CLOGGED.CHECK WATER PUMP SEE IF WATER PUMP WEEP HOLE LEAKING IF SO REPLACE WATER PUMP.IF ENGINE OVERHEATING AT A LONG TRAFFIC LINE ENGINE COOLING FANS NOT RUNNING EITHER COOLING FANS FUSE AND RELAYS BAD.OR ENGINE COOLANT TEMPERATURE BAD. THE ENGINE COOLANT TEMPERATURE SENSOR TURNS ON COOLING FANS AT A CERTAIN TEMPERATURE IF SENSOR BAD FANS WONT TURN ON. MAKE SURE YOU HAVE 50 /50 MIXTURE OF COOLANT AND WATER IN COOLING SYSTEM.

usually your fuse box cover has a diagram inside the cover but also if you have a maual too it should show in there too. You should check the thermastat because if this does not open up to allow the coolant inside the engine to keep it cool then its most likely the thermastat. The fans usually comes on at a much higher temperature then the thermastat comes open and then the fans comes on after that usually its like a double protection but there is a regulator sensor that is by the engine that sends the temperatures to the computer which regulates the engine temps and computer tells the fans to come on.

the electric fan will only come on if the coolant temperature is 200-210 degrees. if your car doesnt ever reach 200 then yes you have a bad thermostat. if it does reach high enough to turn on cooling fans then yes your temp sensor is bad.

Hi!!
Make sure the small hose going from the reservoir to the radiator and the orifice at the reservoir are not clogged. If OK, check electric cooling fan system, specifically the Coolant Temp. sensor, Fan Relays and Constant Control Relay Module (CCRM).
Electric cooling fan system consists of a fan and electric motor attached to the fan shroud.

• Engine temperature is monitored by the Engine Coolant Temperature (ECT) sensor.
• Fan is controlled by Constant Control Relay Module (CCRM) with inputs from Powertrain Control Module (PCM).

The electric cooling fan is wired to operate only when ignition switch is in ON position and engine temperature exceeds specified temperature, or when A/C is on and vehicle speed is less than 45 MPH. During hard acceleration, the Wide Open Throttle A/C Cut-Off (WAC) relay controls the A/C clutch and cooling fan. A signal is sent to PCM and then to the CCRM, where the module de-energizes the A/C clutch and cooling fan, decreasing engine load during acceleration.
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.

Turn on the AC--it should start the radiator fans immediately. If nothing, check the fuse for the fans. The relay for the fans is a solid state device that is controlled directly by engine computer. The computer reads the coolant temperature sensor which tells the computer when to turn on the fans for usual cooling. Try to turn each fan manually (engine cool) and check for bad bearings, or fan blades--both fans should spin freely without any noise. If the fans come on with AC, then replace the temperature sensor which should be located near the attachment area of the upper radiator hose on the engine. It will have a single wire attached, and look like a small brass plug with threads. Watch the engine temperature for a while after the repair as the overheating may have damaged the thermostat element. Hope this helps!

MAKE SURE ENOUGH COOLANT IN COOLING SYSTEM. ALSO MAKE SURE COOLING FANS ARE WORKING.IF CAR SITTING AND IDLING IN A LONG TRAFFIC JAM ON FREEWAY OR ELSE WHERE.IF COOLANT FANS DONT COME ON CAR WILL OVERHEAT BOIL OVER.HAVE CAR SCAN FOR A FAULTY COOLANT TEMPERATURE SENSOR FAULT.AND CHECK THE COOLING FANS FUSE AND RELAYS.MAKE SURE COOLING FANS ARE WORKING.ALSO PUT COOLANT BACK IN TO MAKE UP WHAT BOILED OUT.

check cooling fan relays,also make sure all air is bled out of coolant system,,,replace coolant sensor