Question about 2001 Nissan Pathfinder

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The ac is on full at all times, even when you adjust the fan hight. someone sayed i need a a/c auto amplifier. but i can't find that part

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  • Master
  • 432 Answers

Good Evening, If I am translating this properly your fan only works on the high setting? And the other settings do not change the speed? If this is correct respond back and I will help as much as possible.

Posted on Nov 06, 2010

  • Larry Forbell Jun 15, 2013

    That is correct I have 1 speed high and it is annoying. I have heat and AC so it has to be a bad switch.

  • Larry Forbell Jun 15, 2013

    it is a 2001 Nissan Pathfinder LE

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  • Nissan Master
  • 14,036 Answers

IF YOU HAVE MANUAL CONTROLS THE AC OR HEATER BLOWER MOTOR RUNS ON 1 SPEED PROBLEM COULD BE BLOWER MOTOR RESISTOR OR CONTROL SWITCH BAD. IF YOU HAVE CLIMATE CONTROL.YOUR BLOWER MOTOR HAS A FAN CONTROL AMPLIFIER.IT DOES SAME THING AS A BLOWER MOTOR RESISTOR IT CONTROLS BLOWER MOTOR SPEED.

Posted on Nov 06, 2010

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1 Answer

AC ON MY CAR


Yes , pretty much it should. Need the high side pressure to say what is wrong. Just a guess, the compressor is weak/worn. Look at the high and low pressure when the fans are on to get an accurate reading.

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manual A/C system or the fully auto system? option?

lots and lots of reasons, i can list them all , im the electric guy.
retired.
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answer 1: get it serviced? not an options? do say? we cant guess
what your question is, why, ? see #1 below for users DIY.
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now the step 4 elaborations..
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SCAN on the PCM port. see if there are DTC errors. (do that now)
logic fails. BCM controls the front fan (cond) or PCM does on manual AC option.
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the tests are easy do you want me to gue$$ or TEST.

25492229-331th0o4ygoodik5f23zyrbq-3-0.jpg

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Well, I can't tell by your explanation if the knob stem is broken & just spinning around or if it feels normal and nothing happens.

So, I guess I would first have you check all the fuses labeled "AC" or "Heater". Might be just a blown fuse, but remember, fuses always blow for a reason. There are many things that can be causing your problem like the heater/ac fan speed relay or a broken wire, etc.


I don't how auto repair savvy you are but, Google "Mazda 3 a/c panel". You will see many things on that first page like inexpensive replacement knobs, etc. There are even several YouTube videos on how to gain access to your ac/heater control panel. There is a wealth of information there. If you are not a do-it-yourselfer, you can at least look through there to educate yourself before you take your car to someone. Being informed ahead of time is very valuable.

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Charlene -

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Air filter replace.
Fuel filter replace.
Brakes/pads/oil/discs/dust proof sealers,
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Valves adjust.
Wheels alignement/balance .
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Engine compartiment belts.
Battery/alternator condition/charge rate.
Lights alignement/hight ceck.
Thermostat open/thermoswitch triggers fan.
Coolant ceck/change.
AC pressure.
Doors/trunk/hood/roof look/hinges oiling.
Remote battery ceck.
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The twin fans behind the radiator runs all times even when the car is cold in the morning soon as i switch on the car.


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