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Posted by Tony Sivori on January 19, 2008, 11:15 pm
Noon-Air wrote:
>> Noon-Air wrote:
>>> FWIW, your furnace is a 2 stage, variable speed model...
>>
>> That is interesting, I've never noticed the blower running at more than
>> one speed. Should the difference be obvious?
>
> If it was installed correctly, you should never even be aware that its
> even running.
Well, I certainly hear the draft inducer when it starts. Although I have
gotten used to it, the draft inducer sounds almost like someone has turned
on a vacuum cleaner in the basement. I also hear the blower, but that is
only because it tends to be very quiet in my house.
> If there is no change when its running, then its one of 2 things...
> either the demand is not there to kick in the second stage, or it was
> hacked in by the lowest bidder and neither furnace or controls were set
> up correctly, in which case, all bets are off.
I'd guess that I have the single speed version of that model.
If it is a two stage model, should the second stage kick in after a
predetermined number of minutes of heat, even with a plain thermostat? A
quick google indicates that at least some brands and models will do this.
--
Tony Sivori
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