Question about 2000 Pontiac Grand Am GT

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My heater & A/C control (fan) switch has 1 to 5 settings, but only operates 3,4 and 5. Is it the switch or possibly the fan motor?

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  • terryboone Sep 11, 2008

    My fan works on speeds 4 and 5 but not 1, 2 or 3. This started when I had the ignition switch replaced.

  • Anonymous Oct 09, 2008

    Had the same problem and it was the resistor

  • Anonymous Oct 15, 2008

    I have the same problem, fan switch only works on 4 and 5 even though it has 1-5 settings. how easy is it to fix?

  • debraviles Oct 24, 2008

    My 1998 Grand Prix has a similar problem. #3 was the only one working on my heater switch. Now, when the car is shut off, keys out of the ignition, the fan blower continues to blow until I remove the fuse under the dash. I am assuming it would be the same thing as the resistor that was suggested.

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It is probably your blower motor resistor.

Posted on Nov 01, 2008

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Hello from what i am reading on your complaint if i understand you correctly you it sounds like a may be a fan relay a possible burnt resistor within it

Posted on Sep 11, 2008

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Heater fan runs when heater is off.06 ford expoler


Automatic or manual climate control ?
  • The blower motor does not operate correctly - manual climate control
  • Circuitry short
  • A/C blower motor resistor
  • A/C blower motor switch
  • Blower motor high speed relay
  • Go To Pinpoint Test O .

  • The blower motor does not operate correctly - EATC
  • Circuitry short/open
  • A/C blower motor speed control
  • EATC module
  • Go To Pinpoint Test Q .

Pinpoint Test Q: The Blower Motor Does Not Operate Correctly - EATC
Normal Operation Under normal operation, the blower motor control module receives a 1-2 volt signal from the EATC module through circuit CH218 (GN/VT) to determine the desired blower motor speed. The EATC module receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the EATC module sends 12 volts to the blower control module through circuit CH217 (BN).
    Possible Causes
  • An open, short to voltage, ground or together in circuits CH218 (GN/VT), VH219 (GY) or circuit CH217 (BN)
  • Blower motor control module
  • EATC module
  • If automatic HVAC system i would suspect Blower motor control module .

Oct 27, 2016 | 2006 Ford Explorer

2 Answers

Blower motor speed not working


This is usually due to 1 of 3 possible problems.

  1. Bad blower motor resistor - attaches to blower motor and regulates fan speeds. Not uncommon to lose 1 speed at a time until you get stuck with only 1 speed
  2. Bad blower motor
  3. Bad heater control module - less likely but still possible the module is bad and the whole unit requires replacing

Oct 16, 2011 | 2000 Kia Sportage

2 Answers

Heater Blower Fan only works on hi (3) 2 and tree no operation. Switch is ok. I checked it. 2004 Ford Expedition


It's probably the heater blower motor resistor. This resistor is what's used to run the motor in every setting but high. It's usually located under the hood, somewhere on the bulkhead (firewall). look for a small wiring harness that goes into the bulkhead. there's usually a small plate held in by two screws. You don't know what the part looks like? Then go to the parts store and ask to see a new one. It could also be located inside under the dash on the passenger side. This is something that can usually be done pretty easily once the part is located. I hope this information has been helpful and thank you for using Fixya.com

May 28, 2011 | Ford Expedition Cars & Trucks

2 Answers

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


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.

Nov 06, 2010 | 2001 Nissan Pathfinder

1 Answer

I own a 2005 jeep liberty. the ac, heater fan only works on selector switch setting # 4. nay sugesstions on why fan does not work on settings 1, 2 or 3.


The lower speeds are accomplished by running the power supply through various resistors that drop the voltage which makes the blower turn at different speeds. The lowest setting uses all the resistors to drop the voltage as much as possible to turn the blower as slow as possible. High speed uses no resistors so the blower gets full power and turns as fast as possible.

Since speed 1 and speed 2 use the speed 3 resistor to drop there voltage and speed three is not working as well my guess is the speed three resistor is burnt out in the device referred to as the blower motor resistor or blower motor speed control module. This is located near the blower motor and is held in place with 2 screws. There will be several wires and possibly two connectors plugged into it.

These are really common failures in many vehicles. The parts are usually available at your local auto parts store and they are typically not that expensive.

Hope that helped.

Oct 07, 2010 | 2005 Jeep Liberty

1 Answer

OUR 04 TRAILBLAZER, THE A/C STOPPED WORKING, IT WOULD WORK SOMETIMES AND BLOW COLD AIR NOW NOTHING COMES OUT, OR THE HEATER TOO.. LITTLE AIR WILL PULL THROUGH IF ON THE HIGHWAY, I CAN HEAR IT CLICK OVER...


a couple of things,1 blower motor fuse.2 blower motor gone out.3 switch on fan speed control switch not sending signal to fans.after checking the fuses.next check theswitch on control panel.set ac or heater.if fan still doesnt come on then replace it.when it work and then stops working there are a lot of possiblities that caused the prob relay too not fliping over inside staying close loop.hope this helps.

Aug 16, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Heater not working on setting 3


The blower motor resistor is bad, when you have the fan on high the fan motor (or blower motor) gets full voltage. When you have the switch on any other setting it gets reduced voltage via the "Blower Motor Resistor". That part is usually fairly close to fan motor in the duct work and is held in place with a couple screws and has a plug in going to with several wires. Sometimes that plug in gets melted to the resistor and the plug (or pig tail) has to be replaced too. This should be a fairly simple fix depending on the location of the resistor. The parts should be less than $100.00

Dec 26, 2009 | 2001 Ford Escort ZX2

1 Answer

My fan heater only works on the highest setting 6


Hi. This will be the result of a failed resistor switch. the switch controls the current level sent to the blower motor. Once replaced, the motor will operate at your desired rate. This switch is an integrated part of the AC/Heater control cluster, that is mounted in your dash. You will need to remove the trim, and cluster assembly to expose the damaged switch.

Dec 04, 2009 | 2002 Jaguar X-Type

2 Answers

A/c heater won't blow... Blower works even replaced with new blower but still won't blow... Is there a relay to replace? The fuse for a/c is good


did you check to see if the a/c belt is still on the a/c puller ? if so then try a flush of all hoses.

Oct 25, 2009 | 1998 GMC Blazer

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