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Radiator fan problem 2000 impala

My radiator fans do not work when the sensor is plugged in. The only time they work is with the sensor is unplugged. I think my sensor is ok because my temp gague works.

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  • sgallagher_9
    sgallagher_9 Nov 08, 2012

    I tested my relays and they seemed ok

  • sgallagher_9
    sgallagher_9 Nov 08, 2012

    fans came on when the IAT and MAF were unplugged (I was fiddling with something else)

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: 2000 chevy venture cooling fans not working issue

The PCM may be defective.

Posted on Oct 20, 2008

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greg_margo
  • 1959 Answers

SOURCE: PO481 code Chevy IMPALA 2003

Looked it up in Chilton's, confirmed in http://www.obd-codes.com/trouble_codes/

P0481 Cooling Fan 2 Control Circuit Malfunction

Each fan will throw a different code. See 3 fans listed for your model. Here's a link for the wiring schematic: http://www.chiltonlibrary.com/content/images/WD/GM/014/WD_GM_014788.pdf


Best of luck.
Greg

Posted on May 23, 2009

Gort007
  • 1187 Answers

SOURCE: 2001 Impala Cooling Fan Not coming on ever and car

Cooling fan relay switch (in the fuse box uner the hood). Look for othger relays in there that are the same type number (they are all marked). If you find one that is the same as the cooling fan relay, then swap the two relays and check. (Turn on car and turn on A/C ... fan will start ... or not).

Fan motor could be bad (most likely).
If you remove it yourself, don't scrapr the radiator fins with the fan blades.

Hope this helps!

Posted on Sep 18, 2009

  • 14036 Answers

SOURCE: having issues with a 2000 chevy impala overheating

YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.

Posted on Feb 15, 2011

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1 Answer

How to remove and replace radiator


To remove and replace a radiator is a major mechanical job, requires some quite complete equipment and some mechancal knowledge.
Last time I had my radiator replaced, it took about 2 hours for a proffesional radiator mechanic . Are you sure your really want to do it yourself?

Better then any "explanation", watch these youtube videos:

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My 2001 chevy impala keeps over heating and I don't know why. I've replaced the radiator and fans recently so they are good. The fans don't turn on most of the time though. Is there a sensor that could be...


It's possible that the thermostat has gone bad. If the valve on the thermostat remains closed, it's possible that water isn't flowing to the sensor that controls the radiator fans, thus you wont get an increase is fan operation.

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is your electric fan working? Is it turning on when you turn the air on? If you have 2 fans on the radiator, is the other one turning on when engine starts to get hot? You seemed to have replaced everything else outside of a new engine block. Just make sure your fans are working properly.

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Electrical fans wont kick on, car will run hot if they dont kick in..Tried changing fuses still wont come on..


The fans have a seperate temperature sensor either in the radiator or the block. Follow the fan wires to locate this sensor and unplug the sensor and with the key on touch the wires together. If the sending unit is bad the fans will come on. If the sending unit works the fan motor is bad.

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Maybe your radiator is clogged flush it out.

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2000 oldsmobile silhoutte


their is a radiator fan switch or coolent temp sensor that cuts it on possibly a relay but first unplug the sensor fans should turn on if not possible it has a bad fan motor

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