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Trane Furnace Error Rick Brandt 01-07-2007
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Posted by Rick Brandt on January 7, 2007, 11:31 am
We have a three year old Trane 80% model that has a queer problem. Every so
often I will notice that the house feels cold. I check the stat and it is
calling for heat with a several degree gap between the temp and the setting.

I can go to the furnace and the following sequence is occurring. The stat will
signal for heat. The igniter will glow up, the burners will light and then they
will almost immediately go back off and I will get an error code LED sequence
that indicates "Flame detected when not expected".

Here's the queer part. Even though the burner area is nearly immaculate, I can
take a rag, duster, or air blower and clean it some more (removing nothing as
far as I can tell). Afterwards, everything fires up and works fine (until the
next time). This happens perhaps every month or two.

There is some sort of probe positioned in the burner area on the left side and
it seems like it is cleaning in that area that solves the problem, but I swear
there is nothing there before I clean of any significance. Is there something
about that probe where the slightest bit of fluff would cause this to happen?
Is it perhaps positioned incorrectly such that it is being hypersensitive to
something?

TIA





Posted by daytona° on January 7, 2007, 11:58 am
remove it and clean it with steel wool

> We have a three year old Trane 80% model that has a queer problem. Every
> so often I will notice that the house feels cold. I check the stat and it
> is calling for heat with a several degree gap between the temp and the
> setting.
>
> I can go to the furnace and the following sequence is occurring. The stat
> will signal for heat. The igniter will glow up, the burners will light
> and then they will almost immediately go back off and I will get an error
> code LED sequence that indicates "Flame detected when not expected".
>
> Here's the queer part. Even though the burner area is nearly immaculate,
> I can take a rag, duster, or air blower and clean it some more (removing
> nothing as far as I can tell). Afterwards, everything fires up and works
> fine (until the next time). This happens perhaps every month or two.
>
> There is some sort of probe positioned in the burner area on the left side
> and it seems like it is cleaning in that area that solves the problem, but
> I swear there is nothing there before I clean of any significance. Is
> there something about that probe where the slightest bit of fluff would
> cause this to happen? Is it perhaps positioned incorrectly such that it is
> being hypersensitive to something?
>
> TIA
>
>
>
>



Posted by Rick Brandt on January 7, 2007, 1:07 pm
daytona° wrote:
> remove it and clean it with steel wool

Thanks, I'll give that a try. Of course the symptom pattern is such that I
wouldn't know for sure if that helped for a least a few months.



Posted by on January 7, 2007, 12:10 pm
On Sun, 07 Jan 2007 16:31:18 GMT, "Rick Brandt"

>We have a three year old Trane 80% model that has a queer problem.

        What kind ? They hang around ? or it likes them ? Or it is
one ?


>Is it perhaps positioned incorrectly such that it is being hypersensitive to
>something?

        It doesn't like being called 'queer'.

>
>TIA
>
>
>

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Posted by Bubba on January 7, 2007, 1:43 pm
On Sun, 07 Jan 2007 16:31:18 GMT, "Rick Brandt"

>We have a three year old Trane 80% model that has a queer problem. Every so
>often I will notice that the house feels cold. I check the stat and it is
>calling for heat with a several degree gap between the temp and the setting.
>
>I can go to the furnace and the following sequence is occurring. The stat will
>signal for heat. The igniter will glow up, the burners will light and then
they
>will almost immediately go back off and I will get an error code LED sequence
>that indicates "Flame detected when not expected".
>
>Here's the queer part. Even though the burner area is nearly immaculate, I can
>take a rag, duster, or air blower and clean it some more (removing nothing as
>far as I can tell). Afterwards, everything fires up and works fine (until the
>next time). This happens perhaps every month or two.
>
>There is some sort of probe positioned in the burner area on the left side and
>it seems like it is cleaning in that area that solves the problem, but I swear
>there is nothing there before I clean of any significance. Is there something
>about that probe where the slightest bit of fluff would cause this to happen?
>Is it perhaps positioned incorrectly such that it is being hypersensitive to
>something?
>
>TIA
>
Its probably a thermostat problem. Replace the thermostat with a new
good quality digital programmable type. Make sure you replace the low
voltage wiring from the furnace to the stat. The wiring can get out of
sync and the electron flow wont match the system.
After that, you might wish to acquire a FameSensor@Booster. This
should alleviate the "queer" problem.
Bubba

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