The two coolant fans stopped working and the engine runs a little warmer than usual,but fuses in fuse box are fine.how do i know if the fuses under the hood are bad by looking at them.is this the probable cause?
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Re: coolant fan stopped working
Try this.. turn on your a/c ... then look at the fans.. if fuses are good at least one fan will come on.. coolant temp sensor and radiator fan switch are most likely the problem... one goes bad takes your temp enabled fan away... i usually change both at same time.. normally like $12 each or so.. some teflon tape a socket and a little coolant should get you fixed... also.. make sure when you do this the car has been off for a LONG period of time. any coolant in there will be VERY hot if not.. hope i help
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You still have many other components in that system that has to be in working order for the cooling fan to work properly. The cooling fan is turned on when engine temp reaches a predetermined temp, usually around 220-230 degrees F. the ECT (engine coolant temp) sensor siganls the ECM (Engine Control Module) to ground the cooling fan relay or cooling fan module(if equipped) and if the cooling fan fuse is good and the fan has power to it the realy will complete the ground for the fan to run. You may need to have a qualified technician diagnose the problem if the obvious things like fuses and good grounds are not the problem.
usually the radiator fan is connected directly to the drive trane/ fan belt. it's located directly in front of your engine block and should always be running if your engine is running. if this is not the case, fuses are usually located either in the floorspace of the passenger seat, under the steering column, in the driver's seat floorspace, or under the hood in a black plastic box. to test fuses just follow the diagram located on the fuse box cover and just trade out the fuse with a good one. auto stores usually sell fuse testers for a few bucks too. BAM, taco slingshot.
CHECK COOLANT FAN FUSES AND RELAYS. CHECK COOLANT LEVEL.MAKE SURE ITS NOT TOO LOW BECAUSE IF COOLANT TOO LOW . BY NO COOLANT AROUND OR COOLANT SENSOR NOT SUBMERGED IN COOLANT COOLING FANS WONT TURN ON.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER. CHECK FOR CLAPSE RADIATOR HOSES.CHECK RADIATOR HOSE AT WATER PUMP.IF HOSE LOOK CLAPSE REPLACE IT AND BLEED COOLANT SYSTEM.IF EVERY THING HAS BEEN DONE YOU NEED ENGINE BLOCK FLUSHED OUT.HEATER CORE ALSO COULD BE STOPPED UP.A VERY HIGH MILEAGE ENGINE WILL OVER HEAT.OLD ENGINE LOSES COMPRESSION AND HORSE POWER.PUTTING MORE LOAD ON THE OLD ENGINE WILL MAKE IT OVER HEAT.IF COOLANT LEVEL IS LOW.BLEED COOLANT SYSTEM.START THE ENGINE LET IT IDLE FEW MINUTES WATCH THE COOLANT TEMPERATURE GAUGE.WHEN TEMPERATURE START RISING.TURN OFF THE ENGINE LET IT SET FOR 20 MINUTES.TAKE A LARGE RAG PLACE OVER RADIATOR CAP ON COOLANT EXPANSION TANK SLOWLY OPEN RADIATOR CAP JUST A LITTLE TO RELEASE A LITTLE PRESSURE AT A TIME.DONT OPEN CAP RAPIDLY OR YOU WILL GET SCALDED.ONCE THE RADIATOR CAP REMOVED.IF COOLANT LOW ADD MORE COOLANT IN THE THE COOLANT EXPANSION UNTIL YOU GET TO THE COLD MARK.REPEAT THIS PROCEDURE START ENGINE LET IT RUN UNTIL TEMP GAUGE START CLIMBING A BIT DONT LET CAR RUN TO OVER HEAT JUST IDLE UNTIL TEMP JUST START TO RISE.THEN YOU TURN OFF ENGINE. WAIT 20 MINUTES.THEN USE LARGE RAG OPEN RADIATOR CAP LITTLE AT A TIME. DO THIS PROCEDURE UNTIL THE COOLANT IN THE EXPANSION TANK STOP DROPPING. THEN ALL THE AIR IS BLEED OUT THE COOLANT.WHEN COOLANT LEVEL STOP DROPPING, WHEN YOU DRIVE CAR AROUND.AND TURN OFF ENGINE.WHEN ENGINE OFF CAR SET FOR A WHILE KEEP CHECK ON THE COOLANT LEVEL IN COOLANT EXPANSION TANK. THE COOLANT LEVEL SHOULD BE AT THE COLD MARK IN THE EXPANSION TANK.MAKE SURE COOLANT IS IN THE EXPANSION TANK.IF NOT AIR WILL DRAW IN COOLANT SYSTEM. CAUSING ENGINE TO OVER HEAT.IF BLEEDING AIR OUT THE COOLANT SYSTEM DONT HELP AND COOLANT FANS DONT TURN ON YOU HAVE PCM PROBLEMS.
Thanks for choosing FixYa and welcome to the site. Have you checked your fuses yet? If the fuses doesn't work for the radiator fan, either the fan is bad or the wires are bad. You can hook a wire to the fan wires and run it to your fuse box to see if the fan is bad or it is the wire. It would at least turn the fan on to cool the engine. As for the a/c fan, same thing, check your fuses. You need a voltage meter. This way, you can test all your wires and you could pick out the bad ones, if the fuses turn out to be good. Once again, it could be the wires or the fan itself. I would say the fan is the reason you are overheating. Find the bad wire and replace it or run a second wire to the fuse box. Make sure you have correct coolant and check your hoses and clamps. It could be the coolant cap as well. If you have any questions, feel free to ask.
LOOK UNDER THE HOOD IN THE ENGINE COMPARTMENT. ON DRIVER SIDE FOR FUSE BOX.LOOK ON FUSE BOX COVER IT HAS LOCATION FOR FUSES AND RELAYS.MOST TIME PROBLEM WITH COOLING FAN CIRCUIT WILL CAUSE CHECK ENGINE LIGHT.BAD ENGINE COOLANT TEMPERATURE SENSOR WILL CAUSE COOLANT FANS NOT TO TURN CAUSE OVERHEATING. ON.REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP SEE IF STOP OVER HEATING. IF ALL LOOKS GOOD HOTWIRE COOLANT FANS MAKE SURE FAN MOTORS ARE GOOD AND NO SHORTS AT FAN CONNECTOR WIRES.
Check the cooling fan fuse,and relay,if they seem to be fine,make sure the fan is good,and change the coolant sensor,and see that there is enough coolant in the system and the thermostat has been changed,and there is no air in the coolant system,bleed it out.