AC/Heating fan does not work at lower settings

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Old 04 Oct 2005, 10:16 am   #1 (permalink)
Rajesh Kapur
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Default AC/Heating fan does not work at lower settings

I have a 98 Camry that has been very faithful to me over the years. The air
conditioner/heating has suddenly stopped running on the low and medium
setting. It runs perfectly when I turn the knob to high. The AC green LED
lights up at low and medium setting, but the fan does not switch on. What
could be wrong? Is this something I can try to fix myself? or will I need to
take my car to a mechanic? How much might it cost? Thanks! Raj


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Old 04 Oct 2005, 10:45 am   #2 (permalink)
Daniel
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Default Re: AC/Heating fan does not work at lower settings

sounds like the fan resistor
there should be a set of resistors near the fan under the dash
on high speed, the lowest resistance setting is being used
at lower fan speeds, higher value resistors are placed in the circuit,
and it is these that have failed.
you should be able to replace the resistor pack at reasonable cost,
with minimal difficulty

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Old 04 Oct 2005, 11:27 am   #3 (permalink)
Vash the Stampede
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Default Re: AC/Heating fan does not work at lower settings

On Tue, 04 Oct 2005 09:16:59 -0500, Rajesh Kapur wrote:

> I have a 98 Camry that has been very faithful to me over the years. The air
> conditioner/heating has suddenly stopped running on the low and medium
> setting. It runs perfectly when I turn the knob to high. The AC green LED
> lights up at low and medium setting, but the fan does not switch on. What
> could be wrong? Is this something I can try to fix myself? or will I need to
> take my car to a mechanic? How much might it cost? Thanks! Raj



This is not eawsy, but you can do it.

On MOST Toys, there is a 'resistor farm' in the fan housing. You have to
pull the fan out of the airbox under the passenger's side of the dash.
Note, it MAY be in the switch, as was in my old Celica, but this was
unusual.

Ten MM socket, remove three screws and the connectors and drop the fan
assembly down. It is typically NOT easy to do!

When you get it out you will see what looks like 3 springs. These are the
resistors. Look carefully, one or two will be burnt or broken near the
base. If you're patient and have a soldering iron, you can GENTLY clean
the break with enery cloth or fine sandpaper and resolder it, try it
before you reassemble! This is the cheap way out and may break in the
middle of the winter when it's -40, or it may last for a year or two. Try
a junkyard, these things are all over tha place and can be used from about
any Toyota. A 3 speed fan will have two or three, a 4 speed fan will have
3 or 4.

Or buy one from Toyota for about $45...
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Old 10 Oct 2005, 06:00 pm   #4 (permalink)
Johnnyboy
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Default Re: AC/Heating fan does not work at lower settings

I have an 89 Camry. I repaired my resistor cluster by replacing the low
speed resistor with a thin coil spring. It was about 1/2 an ohm as I recall.
It has been operating for many years this way.
John

"Vash the Stampede" <Trigun@2am.cn> wrote in message
newsan.2005.10.04.15.39.41.818756@2am.cn...
> On Tue, 04 Oct 2005 09:16:59 -0500, Rajesh Kapur wrote:
>
>> I have a 98 Camry that has been very faithful to me over the years. The
>> air
>> conditioner/heating has suddenly stopped running on the low and medium
>> setting. It runs perfectly when I turn the knob to high. The AC green LED
>> lights up at low and medium setting, but the fan does not switch on. What
>> could be wrong? Is this something I can try to fix myself? or will I need
>> to
>> take my car to a mechanic? How much might it cost? Thanks! Raj

>
>
> This is not eawsy, but you can do it.
>
> On MOST Toys, there is a 'resistor farm' in the fan housing. You have to
> pull the fan out of the airbox under the passenger's side of the dash.
> Note, it MAY be in the switch, as was in my old Celica, but this was
> unusual.
>
> Ten MM socket, remove three screws and the connectors and drop the fan
> assembly down. It is typically NOT easy to do!
>
> When you get it out you will see what looks like 3 springs. These are the
> resistors. Look carefully, one or two will be burnt or broken near the
> base. If you're patient and have a soldering iron, you can GENTLY clean
> the break with enery cloth or fine sandpaper and resolder it, try it
> before you reassemble! This is the cheap way out and may break in the
> middle of the winter when it's -40, or it may last for a year or two. Try
> a junkyard, these things are all over tha place and can be used from about
> any Toyota. A 3 speed fan will have two or three, a 4 speed fan will have
> 3 or 4.
>
> Or buy one from Toyota for about $45...



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Old 10 Oct 2005, 07:43 pm   #5 (permalink)
Vash the Stampede
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Default Re: AC/Heating fan does not work at lower settings

On Mon, 10 Oct 2005 22:00:37 +0000, Johnnyboy wrote:

> I have an 89 Camry. I repaired my resistor cluster by replacing the low
> speed resistor with a thin coil spring. It was about 1/2 an ohm as I recall.
> It has been operating for many years this way.
> John


Wow! When mine went, I had another car for parts, so fixing it was easy.

Good tip though!!!

>
> "Vash the Stampede" <Trigun@2am.cn> wrote in message
> newsan.2005.10.04.15.39.41.818756@2am.cn...
>> On Tue, 04 Oct 2005 09:16:59 -0500, Rajesh Kapur wrote:
>>
>>> I have a 98 Camry that has been very faithful to me over the years. The
>>> air
>>> conditioner/heating has suddenly stopped running on the low and medium
>>> setting. It runs perfectly when I turn the knob to high. The AC green LED
>>> lights up at low and medium setting, but the fan does not switch on. What
>>> could be wrong? Is this something I can try to fix myself? or will I need
>>> to
>>> take my car to a mechanic? How much might it cost? Thanks! Raj

>>
>>
>> This is not eawsy, but you can do it.
>>
>> On MOST Toys, there is a 'resistor farm' in the fan housing. You have to
>> pull the fan out of the airbox under the passenger's side of the dash.
>> Note, it MAY be in the switch, as was in my old Celica, but this was
>> unusual.
>>
>> Ten MM socket, remove three screws and the connectors and drop the fan
>> assembly down. It is typically NOT easy to do!
>>
>> When you get it out you will see what looks like 3 springs. These are the
>> resistors. Look carefully, one or two will be burnt or broken near the
>> base. If you're patient and have a soldering iron, you can GENTLY clean
>> the break with enery cloth or fine sandpaper and resolder it, try it
>> before you reassemble! This is the cheap way out and may break in the
>> middle of the winter when it's -40, or it may last for a year or two. Try
>> a junkyard, these things are all over tha place and can be used from about
>> any Toyota. A 3 speed fan will have two or three, a 4 speed fan will have
>> 3 or 4.
>>
>> Or buy one from Toyota for about $45...


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