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Re: Furnace Settings

To: "Trevor Boicey" <>, "Randall"
Subject: Re: Furnace Settings
From: "Karl Vacek" <>
Date: Wed, 14 Dec 2005 12:13:20 -0600
> >> Basically, the thermostat controls the burner and the limit switches
> >> control the blower based on the internal temperature.  You want about
> >> 90dF low and 110 high.  It lets the burner pre-heat so you don't get
> >> a cold blast, and runs the fan after the burner has shut off so you
> >> don't waste heat up the chimney.
> >
> > I've not checked it with a thermometer, but feeling the air from a
> > register seems to confirm that the fan switch is pretty close.
>   Am I missing something?
>   My fan timing is controlled by my thermostat, as in "the digital control
> thing that lives upstairs". Lots of settings in it to compensate for
> various furnace types and personal preferences.
>   Considering this thing cost $40 at most, dealing with a mechanical one
> that may be inaccurate seems odd...

Ummmm, yes you are missing something - read the first sentence.  They're
talking about the limit switches in the furnace itself.

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