Question about 1997 Chevrolet Blazer

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When I turn the ac on in my 97 chevy blazer it's not cooling it's just blowing air like a fan would and I looked under the hood only to see the belt stop spinning the spindle every 2 seconds and then it would restart itself. Is there something I need to tighten?

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Maybe the belt or your unit could be seizing or locking up due to bearings faulty

Posted on Sep 29, 2010

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Your radiator fan is probably failed. Pop open hood, watch temp rise, once past "normal " level teh fan should turn on. If not, you need to trouble shoot the rad fan. There should be heavy duty fuses and relays under the hood in an electrical distribution box. You should consult the owners manual or chart on the box lid. Of course the fan maybe bad itself. You can also try - turn on the AC, this will activate the 2nd (booster) fan, and should help prevent serious overheating but wont fix the underlying problem.
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The air is not cool when idling, it blows warm. Also the setting 1 and 2 doesnt work, only 3 and for makes air blow.


Sounds like 2 different problems here. The ac gets warm when standing idle, is most likely the under hood fan not kicking on when ac is on. This may be a fuse issue or a relay. When ac is on, the fan should be on all the time. Relay maybe in an electrical box under the hood. Unplug the fan and test for power with a test light to see if the fan has power when ac is "on".

The inside fan not working on levels 1& 2 is likely the voltage ballast issue. this is an electrical block which controls voltage to change fan speeds. Usually found under the passenger side dash, right in the air flow comming from the fan and inside the air flow housing. Usually held in by 2 or 3 screws with a connector and 3-4 wires sticking out. this should be under $20 to buy and quite easy to change, if you can find it. Try behind glove box etc. Do not test the new one without it being in place, as it may burn out very quickly without the air flow to cool it.
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get a mechanic to have a look ,water level low hence the heater is cold and ac taking a long time to cool because the fan isnt starting up when ac is turned on ,Sounds like your fan is playing up and you may have cooked the head gasket??

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i would deff check the relay i had a problem with my relay going out on my 04 but i just ran my fan to a togle switch so i can turn it on and off when i want it on when im in dead stop situations like traffic and also when your ac is on the fan has to be on or your ac will cut on and off to keep your car from really over heating in a hurry if your not moving, but i also run my car at the track and it helps to keep it cooler when racing down the drag strip.

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