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Cooling fans not working 2005 malibu

Fans do not come on with ac on .not even when car begins to run hot,

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2001 Kia Optima over heating

I figured this out and fixed it on my 2001 Optima. Mine was an electrical problem, not an overheating problem. The problem shows up when there is a heavier than normal load on the electrical system. For most of us, this is when the air conditioner is running full-blast on a hot summer day. However, it was also occuring when I ran the heater full blast. The heater running full-blast should have lowered the temperature, not raise it. So I tested the coolant temp while the gauge was showing it overheating. The coolant temp was not increasing, but the gauge showed that it was. It is caused by a bad ground connection. Another test you can do to see if your problem is the same as mine is this. As soon as the engine is showing overheating, pull over, park the car and turn off the engine. Immediately start the engine again and see what the temp gauge shows. If it still shows hot, you'll know you've really got overheating coolant. If it goes back to normal range, you'll know it's just a bad ground connection. Turning off the engine eliminates the resistance in the electrical system that has beeen building up and causing an erroneous high temp reading.

To fix: Either find and clean ground connections throughout the vehicle until it fixes it, or do what I did. A mechanic at the Kia dealer showed me this. I ran a new wire from an empty bolt-hole on the top of the engine to a bolt into the frame behind the engine. I only added a 6 inch wire and a new bolt into the top of the engine. The bolt into the frame was already there, so I just removed it, put the wire under it, and replaced the bolt. It created a redundant ground that prevented the build-up of resistance that caused the erroneous temp reading. It was a 5 minute fix and it has never done it again. Kia knows about this problem and they put out a post to their shops on how to fix it.

Posted on Oct 01, 2008

whitehorse02
  • 11 Answers

SOURCE: 99 chevy malibu

Your fan motor might be fried... and check your coolant, they have a tool which measures its ability to do its job. you might need a radiator flush but start small... THe tool to make sure you anti-Freeze is good is very cheap. By one and test it (it tells you how to test it) then check your fuzes for your Radiator fans in your owners manual. if that is good take your fans off and have them tested. you need to get your fans working again even if you need to by new. And see if your car needs a coolant flush, ( a true flush not a drain and fill

Posted on Oct 21, 2008

mnabi01
  • 94 Answers

SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on

the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck

Posted on Jan 28, 2009

matney68
  • 426 Answers

SOURCE: cooling fan sensor

you should have a fuse and relay for fan. Those should be checked and also the fan itself

Posted on Sep 02, 2009

Molson02536
  • 3854 Answers

SOURCE: 2005 malibu - heat/ac has 4 levels for fsn, level

Your blower speed resistor has gone bad and needs to be replaced. You can pick one up at Auto Zone or Parts Source with the step by step instructions to getting the resistor replaced with common tools.

It is located under the glove box, way in the back of the passenger foot area. You'll need to remove 2 screws with a 7mm socket, and remove the plastic cover that covers the blower motor and another component box that I think controls the passenger airbag. After removing the plastic cover you'll need to side that passenger airbag module to the right so it pop off its mounting bracket and move it out of the way. That will give a better view of the blower motor. I highly recommend you also remove the blower motor itself because the Blower Motor Resistor is located behind it. I think you'll need a 5mm or 5.5mm socket to remove the 3 screws that hold in place the blower motor and 2 more screws for the Blower Motor Resistor... It's a cramped location to work in but if you have all the tools and enough lighting then it shouldn't take more than 30-60 minutes to do. The Blower Motor Resistor costs about $19-$25. Good luck

Posted on Nov 30, 2009

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1 Answer

Why cooling fans do not work unless ac is on?


Are you talking about the fans under the hood? If so, these are thermostatically controlled. They won't turn on unless the engine (and thus the coolant in the radiator) gets above a certain temperature. But they will always run when the A/C is on. If yours NEVER run, even when you've been sitting in traffic with the engine running for an hour on a hot day, take the car to a shop and have the fans/thermostats checked.

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2005 chevy malibu cooling fans not coming on causing the car to over heat at idle.


replace the temp sensor its gone out of range
service the fans
these fans have carbon brushes maybe one is a bit worn set or something.!!!

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The most common reason for running hot at idle is the radiator fan is not running or pulling enough air thru the radiator. If you have a fan for the engine and one for the ac, the engine fan may not be working.
The radiator fan should come on when the coolant reaches 220 degrees. The computer sends a signal to the fan relay.

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Does the engines electric cooling fan turn on when it gets hot? Does it cool off if you turn the AC on?

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Does cooling fan on 2005 malibu suppose to run constently


on the passenger side of the radiator, there is a temp switch, see if the wires got disconnected or cut. is your A/C on when you start the car? if so, turn it off, maaybe forcing the fans on.

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your high speed fans are not coming on are they? when you turn on the a/c open the hood and make sure that your fans are going at high speed. could be fuse or bad fans

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1 Answer

Cooling fans on 2001 chevy malibu will not come on unless ac on


the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck

Jan 28, 2009 | 2001 Chevrolet Malibu

2 Answers

Heater


Try spinning the knob real fast in either direction. Sounds stupid but it worked for me.

Sep 27, 2008 | 2005 Chevrolet Malibu

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