Question about 1997 Jeep Grand Cherokee

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Ac fan only blows on 4 what the heck?

My 97 cherokee xj has a problem with the ac fan , it only blows on high(4) whats up how do i fix?????

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  • Philip M. Alexander May 11, 2010

    Ok partner there is only two fixes. Obviously you have power to the switch. On the passenger side under the dash you will see the blower motor and a small rectangle plastic piece with two screws in it. in there is a reistat and is known to fail. Check that you are getting power to there on all three legs/terminals and then check for a proper ground. If all is not so great there I sugest you pull off the dash trim around the climate control and remove the climate control head unit. Check for output power on all four terminals. One terminal will always be hot/or have power when the key is on. If you have no output the you have a defective switch.

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When the resistor he's telling you about fails, it still blows on high but loses one or more of the lower speeds, since its purpose is to limit current and produce those lower speeds. It is probably at fault, but your blower motor will likely fry the new one you buy. Replace together with new blower, or prepare to buy another one not far down the road. Good luck. TT

Posted on Jan 28, 2009

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cost about $80 to have the problem fixed by my mechanic in Jersey. hope that helps!

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