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reasons blower fails to low Rald 08-12-2007
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Posted by Joseph on August 12, 2007, 4:07 pm

> What should be the first things to check when a blower randomly fails
> to low speed after working properly? It's a TUD080R9V4k4 connected to
> rxco36s3hpdo and 4ttx4036a1000aa. Thanks for any ideas.

Welcome, First a couple of questions. Have you posted here before, don't
recognize the name? Are you in the HVAC
trade, ability level? I don't have any idea of your experience or skill level.

Joseph


>


Posted by Zephyr on August 12, 2007, 4:41 pm
If you are a technician, and not sure what to look for, I'd suggest a little
more studying is in your future.

Zyp

>
>> What should be the first things to check when a blower randomly fails
>> to low speed after working properly? It's a TUD080R9V4k4 connected to
>> rxco36s3hpdo and 4ttx4036a1000aa. Thanks for any ideas.
>
> Welcome, First a couple of questions. Have you posted here before,
> don't recognize the name? Are you in the HVAC
> trade, ability level? I don't have any idea of your experience or skill
> level.
>
> Joseph
>
>
>>
>



Posted by Rald on August 12, 2007, 9:36 pm
> > What should be the first things to check when a blower randomly fails
> > to low speed after working properly? It's a TUD080R9V4k4 connected to
> > rxco36s3hpdo and 4ttx4036a1000aa. Thanks for any ideas.
>
> Welcome, First a couple of questions. Have you posted here before, don't
recognize the name? Are you in the HVAC
> trade, ability level? I don't have any idea of your experience or skill level.
>
> Joseph
>
>

I apologize for not leaving enough detail or background for those who
tried to take a stab at this one. I am not in the hvac trade, but
thought there might be a simple solution like check the wiring, try a
different 2-stage thermostat, or perhaps a known issue with the
handler model. If there are no possible simple things I can try, I
will of course be asking an hvac tech to stop by. The blower dropped
to low speed several evening ago and has not left low speed despite
the high outdoor temperatures of the last couple days. The little bit
of air coming out the supply vent is still very cold.




Posted by on August 12, 2007, 10:07 pm

> > > What should be the first things to check when a blower randomly fails
> > > to low speed after working properly? It's a TUD080R9V4k4 connected to
> > > rxco36s3hpdo and 4ttx4036a1000aa. Thanks for any ideas.
> >
> > Welcome, First a couple of questions. Have you posted here before,
don't recognize the name? Are you in the HVAC
> > trade, ability level? I don't have any idea of your experience or skill
level.
> >
> > Joseph
> >
> >
>
> I apologize for not leaving enough detail or background for those who
> tried to take a stab at this one. I am not in the hvac trade, but
> thought there might be a simple solution like check the wiring, try a
> different 2-stage thermostat


Bubba, whatcha think... is a new stat in order? :-)



Posted by daytona° on August 12, 2007, 11:29 pm
You have a 80% AFUE, 2-stage, Variable speed DC motor furnace that is not
ramping up and staying in low speed. Was there any lighting lately around
the house?

>> > What should be the first things to check when a blower randomly fails
>> > to low speed after working properly? It's a TUD080R9V4k4 connected to
>> > rxco36s3hpdo and 4ttx4036a1000aa. Thanks for any ideas.
>>
>> Welcome, First a couple of questions. Have you posted here before,
>> don't recognize the name? Are you in the HVAC
>> trade, ability level? I don't have any idea of your experience or skill
>> level.
>>
>> Joseph
>>
>>
>
> I apologize for not leaving enough detail or background for those who
> tried to take a stab at this one. I am not in the hvac trade, but
> thought there might be a simple solution like check the wiring, try a
> different 2-stage thermostat, or perhaps a known issue with the
> handler model. If there are no possible simple things I can try, I
> will of course be asking an hvac tech to stop by. The blower dropped
> to low speed several evening ago and has not left low speed despite
> the high outdoor temperatures of the last couple days. The little bit
> of air coming out the supply vent is still very cold.
>
>
>



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