Question about 1997 Nissan Sentra

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Sentra heater fan trouble

Hi my 1997 Sentra has a heater fan problem. It will only go on 4 but not on settings 1,2 or 3. Do you think this could be the fan its self or some kind of switching trouble?

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  • 2 more comments 
  • sfish1 Nov 17, 2008

    I started to lose one level at a time, does this suggest alternator troubles?

  • bighg Dec 08, 2008

    2001 Sentra, lost settings 1,2,3 but not 4. Haven't taken it to the dealer yet, still saving enough money to do so ...

  • Rainman98 Dec 22, 2008

    I have the same problem, the heating a/c switch doesn't work on any level other then 4 (Max). It got me through the winter, but it's a pain.

  • Anonymous Jan 02, 2009

    Does anyone have a solution?



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It is your blower motor resistor. It's located below your dashboard on the passenger side. It's a 3 inch black piece with two screws holding it to the panel under the dash. It will have a wire harness plugged into it. Buy a new one (about $25), unscrew the old one, disconnect the wiring harness from old resistor and plug into new one. Screw new one in. Expensive for such a simple part but a helpful and super easy fix. Takes 1 minute to locate, 2 minutes to change. Sure to fix your problem.

Posted on Jan 10, 2012

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Check the switch

Posted on Oct 10, 2008


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1997 sentra holds how much antifreeze?

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HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

Possible Causes:

HO2S heater control circuit is open or shorted to ground.HO2S heater control circuit is shorted to power.HO2S heater is damaged or has failed.PCM has failed.

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Aug 18, 2012 | 1997 Nissan Sentra

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On a 1997 nissan sentra will the radiator fan run all the time the car is running

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Things to be concered about; 1.) the fan never seems to turn on. This will cause your engine to overheat when you stop.
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2) Faulty fan speed control switch, or poor connection in the associated wiring.

Don't know cost of these items.

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Joe ASE Master tech

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