Question about 2001 Pontiac Aztek

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Aztek over heating cooling fans not coming on the

Aztek over heating. Cooling fans not coming on. The fuse is good. What is causing this?

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  • bpun68 Jun 20, 2009

    replace what? The temp gauge???

  • cbarr70
    cbarr70 Sep 23, 2012

    I am having the same problem. The cooling fans do not kick on with normal tempurature increase, usually at an idle. If I turn on the a/c, both fans will turn on. I've replaced the coolant temp sensor, and tried swapping relays. What is responsible for seeing that the tempurature is high enough to tell the fans to kick on?



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Temp gauge working proprely?turn on ac both fans should kick on after a few if not replace it

Posted on Jun 20, 2009

  • tragedy lok
    tragedy lok Jun 20, 2009

    the fan make sure the temp gauge is working properly the fan might need replacing fuse is good make sure u have 24 volts at the plug to the fan

  • laura guerrero
    laura guerrero Oct 17, 2013

    im having the same problem the fans only turn on when the ac is on and the temperature is rising. ive replace the coolant sensor and tried the relays i even replaced the cap to the water since i was told that could also be a problem im in desperate need of help, we just purchased the vehicle its stressful



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1 Answer

Even with a fully charged battery i need to use a battery pack to start the van when it does start the cooling van comes on for a minute then goes off and that continues

Check rear AC in van and turn it off. Most vans have dual AC. Even if the front AC is off, the rear is still usually on and some vehicles have the cooling fan and condenser fan run together to help with cooling. Check relay and fuse also.

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i have the same problem my 2001 pontiac aztek over heats cause the cooling fans wont turn on........they only turn on when i turn on the A/C this helps the engine cool down and the temperature drops on the gauge can n e one help me?

Apr 15, 2012 | Cars & Trucks

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Cooling fans only come on when you turn on ac

Try checking your fuses for the lo and hi cooling fan one or the other could be out, might be located under the hood in box type

Jul 24, 2011 | 2004 Pontiac Aztek

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I have a 1994 chevy cavalier 2.2L engine. the engine fan does not turn on causing the car to over heat. What makes the fan turn on, is it a thermostat or a fuse?


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Cooling Fans

Hello dc8jimmy...did you check the voltage to the fans? The Aztek is a known overheater...Run a diagnostic scan to see if you have a cooling fan relay circuit open short. Will be easier to correct the problem when you know where to look. I think Haynes has a publication on the Aztek that covers the 01-05 year models.
Good luck...i hope this helps.

May 17, 2009 | 2001 Pontiac Aztek

1 Answer

2001 Pontiac Aztek heats up while ideling

Make sure your cooling fans are coming on, turn on the a/c and as soon as it gets warm they should kick on. If not check your fuses

May 04, 2009 | 2001 Pontiac Aztek

1 Answer

Pontiac Aztek running hot

You may want to do a inspection of your cooling system, here's a list that might help,
  • Check the thermostat, if it's defective replace it.
  • Check the coolant in the reservoir tank, it should be at the proper full level.
  • Sometimes when you change a thermostat there's a possibility you could get air in your coolant lines from having the coolant system opened up, this could keep your coolant from circulating through your system, if so you will need to bleed the air out of the coolant system.
  • The water pump should be inspected for leaking coolant out of the weep hole's, when a water pump go'es bad it may leak coolant, which would mean the seals on the pump are bad, also listen for squealing noise's coming from the pump when the car is started, if it squeals the bearings are bad, there is also a possibility the water pump fins are wore down from corrosion, there is no way to inspect this without removing the pump.
  • check the drive-belt for wear and tension, a bad tensioner or a bad drive-belt could have an effect on the operation of the water pump.
  • check the pressure cap on the coolant reservoir tank for good pressure, when you remove the cap you should hear a hissing sound this means you have good pressure in your cooling system, check for corrosion or build up on the cap, clean the cap if necessary, also check the coolant in the reservoir tank, it should be clean, if not you might need to have the cooling system flushed, during the flush you can observe if the coolant has a good flow through the system.
  • check the large upper and lower radiator hose's for crack's, swelling, and proper coolant flow.
  • Check the operation of the cooling Fan, and circuit, cooling fans use relays and fuses, some vehicles use more than one cooling fan, if your vehicle has two cooling fans there should be two relays and two fuses one for each fan, first visually inspect the fuses if one or both are bad replace them, you can test the relay or relays for continuity by removing them and doing a proper continuity test according to your relays circuit diagram.
  • Check the coolant temperature sensor, most coolant temperature sensors are located directly in the thermostat housing, this sends information to your pcm which determines when to turn your cooling fan on and off, if it's defective replace it.
  • Inspect the radiator grill for damage or debris build up.

Apr 18, 2009 | 2005 Pontiac Aztek

2 Answers

Temperature sensor problem?

There are 2 different circuit that control the cooling fans.
The engine controller turns the low speed fan circuit on to control temperature and turns on the high speed fan circuit if the engine and A/C is running.
It sounds like your low speed fan function is not working.
Find your fan 1 fuse located in the under hood fuse panel and make sure it is not blown. If OK go to next step.
Find your fan 1 relay located in the under hood fuse panel. Find another relay in the fuse panel that matches and swap the two. If the fan then works you know you have a bad relay.
If both are check good, let me know and we will go from there.
Below, I have attached the wiring diagram for your cooling system, hope it helps.

Mar 26, 2009 | 2003 Pontiac Aztek

1 Answer

2004 pontiac aztek cooling fans not working

relays control fans high and low. does fan come on with a/c on?hot wiring only will create more expensive problems in future!!!!! 2004 not 84

Aug 26, 2008 | 2005 Pontiac Aztek

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