Question about 2000 Chevrolet Monte Carlo

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Heater fan switch works only on #5 position - 2000 Chevrolet Monte Carlo

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  • joy_storey Jul 28, 2009

    have followed wiring can not find any heater relay  dose this model really have one

  • joy_storey Jul 28, 2009

    I have done all of these things I have dash torn all apart cannot find any relay.

  • joy_storey Jul 28, 2009

    just where under dash on right side I have this dash torn apart I even have the part dealer sold me and there is no part that i can find  show me.

  • joy_storey Jul 28, 2009

    this is a 2000 monte carlo the heater switch and air conditioner control are the same I have done all the hunting for this resistor and it is not there can you show me were it is.



2 Answers

The blower motor resistor is just below the heater on the passenger side. Remove the cover from beneath the glove box and it is just below the cowling for the fan - on the bottom. It is a little difficult to get to and in held in by 3 screws. Remove the top screw and loosen the bottom 2 screws, disconnect the wire clip and lift up and tilt the top towards the back of the car

Posted on Jul 28, 2009

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When this happens it is because this is the default setting when the blower motor resistor burns out. The blower motor will be located on the passenger side of the vehicle under the dash. The resistor that needs to be replaced will be wired between the blower motor and the climate controls, just follow the wiring to find it. You can get a replacement resistor from an auto parts store or your dealer. Let me know how this turns out.


Posted on Jul 28, 2009

  • Benjamin Patri
    Benjamin Patri Jul 28, 2009

    You have followed the wiring from the blower motor to the speed control switch and there is nothing in between these two besides wiring? It should be there



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1 Answer

Why does the heater only operate in the #5 position

The Heater Fan has a Resistor Pack that Varies the 12 Volts (( 13.6 )) from the Battery to the Electric Fan Motor. The High Fan setting uses Full Voltage (( no resistance )) This could be the Fan Switch but I would suspect the Resistor Pack.

Aug 17, 2014 | Cars & Trucks


Scania Fault Codes

000 00 No Fault
01 001 less than the rated voltage - heater works
02 002 higher than the rated voltage - heater works
004 03 Short circuit fan (D2I)
005 05 Short-circuiting the wires from alarm (D2I)
009 09 Heater off system TRS (D2I / D9W)
010 0A higher than the nominal voltage (heater stopped)
011 0B voltage less than the nominal (heater stopped)
012 0C overheat - fuel pump is turned off
013 0D temperature sensor recorded a high temperature
014 0E big difference values of t. Dutch. overheating and Dutch. regulation. t (D3W / D9W)
015 0F heater overheated many times - the heater is turned off (D2I / D9W)
017 11 Reusable overheating (t exceeds the second threshold) (D3W)
020 14 Candle / rod defective bulbs
021 15 Short candles / kernel bulbs
022 16 switch faulty lights / lamps kernel (D2W)
023 17 Internal defect relay control R2 candle / bar bulbs
024 18 Short-circuit switch controller candle / bar bulbs
025 19 Short-circuit diagnostic socket
029 1D fan air gap 5 does not operate R3
030 1E air fan does not work in all positions (R3-D3W)
031 1F air fan does not work in all positions (R3-D3W)
032 20 Air fan does not work in all positions (R3-D3W)
033 21 Air fan does not work in all positions (R4-D2I / D9W)
034 22 No contact with solenoid valve system COOL. (D2W / D9W)
035 23 No contact with the relay average performance
036 24 Short-circuit relay average performance
037 25 Do not rotate water pump (D2W / D9W)
038 26 No contact with the fan relay cab heating (D2W / D9W)
039 27 Short cab heating fan relay (D2W / D9W)
040 28 Short electromagnetic. COOLING valve system. (D2W / D9W)
042 2A Short circuit water pump (D9W)
043 2B Short cable from the computer to the heater fuel pump (D9W)
047 2F Short circuit of the fuel pump
048 30 No contact with the fuel pump
050 32 Heater run many times but have not worked (relay R3)
051 33 Flames emerged immediately after pressing the start button heater
052 34 No start (restart purge)
053 35 Stop flame during startup
36 054 Stop flame position max. productivity
055 37 Stop the flame in a position average performance
056 38 Stop the flame in the position of poor performance
057 39 Flame sensor short circuit (photoresist)
058 3A heater is turned off, but the flame in the combustion chamber (D2W)
059 3B Water temperature rising too quickly (D9W)
060 3C No contact with the sensor temperature control
061 3D sensor short circuit temperature control
062 3E No contact with the potentiometer (D2H / D2I)
3F 063 Short potentiometer (D2H / D2I)
064 40 No contact with flame sensor
065 41 Flame sensor short circuit
071 47 No contact with the sensor overheating (D3W / D9W)
072 48 Short-circuit overheating sensor (D3W / D9W)
073 49 Overheating sensor recorded the fastest increase in temperature (D9W)
090 5A Spontaneous error
091 5B high surge (high-voltage wires, CB-radio, etc.)
092 5C Faulty heater control unit - fault ROM
093 5D Faulty heater control unit - faulty RAM
094 5E Faulty heater control unit - fault EEPROM
096 60 Temperature sensor faulty heater ECU (D2I)
097 61 Faulty heater ECU (D2I / D2W / D9W)
255 FF cleared but faulty memory EEPROM


on Dec 20, 2016 | Cars & Trucks

1 Answer

Heater fan only works in the #5 position

Your heater switch may be dirty or need a replacement. Try removing it and cleaning it with some electronic spray cleaner. Also check for burnt wires attached to the switch in back. Remove the battery terminal first.

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2 Answers

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While you have the fan out, connect the positive lead and negative lead to the battery. If it powers up, then your problem is most likely the switch or resistor.

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1 Answer

The 5 position heater switch has gradually gone away, at first there was no fan on the #5 position then #4 went. there may be some air coming from the #2 position now but it is hard to tell

you need to replace your blower motor resistor. it is located under the dash on the passenger side, in the ductwork near the fan. the part is available at any parts store. very common failure.

Jan 18, 2010 | 2006 GMC Sierra

1 Answer

Heater blower switch will only work at possion 4

Underneath the glove compartment on the passenger side is a cover which must come off,2 plastic screws holding this cover.Underneath you will find a 5 pin connector[big plug] connected to a white connector in the blower fan housing.This is called the fan resistor which controls the blower fan speed.Unclip the resistor out the housing and renew.Your problems should be solved..regards

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Ford explorer heater fan not working

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1 Answer

1989 ford f350 a/c heater fan only runs on high, replaced switch ,didn,t help. thanks geo

When your heater only works on high it is usually
the resistor unit in the heater passage housing. Look for wires ( about 4or 5 wires ) attached to the
plastic heater housing under the dash. It should
have a screw or two holding it to the housing. Pull
it out and you will see several wire coils. If they are melted or broken then thats the problem. On any switch position except high the power goes through these resistors to slow the fan down. Good luck. Neil W.

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