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Posted by on February 19, 2008, 9:03 pm
On Feb 19, 6:10=A0pm, trad...@optonline.net wrote:
> On Feb 19, 5:03=A0pm, shep...@gmail.com wrote:
>
>
>
>
>
> > Joe,
> > Two excellent suggestions. =A0The thermostat is an older model that has
> > "adaptive setting" that is disengaged. =A0Do you know where the high
> > heat sensor might be located? =A0Is it part of the temperature fan
> > controller?
>
> > Thanks,
>
> > wrote:
>
> > > =A0 =A0 Get the instructions for the thermostat out and take a look fo=
r anything
> > > a bout an anticipator. =A0It may not be set properly for your furnace.=
>
> > > =A0 =A0 The other idea that comes to mind is that a high heat sensor o=
n the
> > > furnace is kicking in for some reason.
>
> > > --
> > > Joseph Meehan
>
> > > =A0Dia 's Muire duit
>
>
.
>
> > > > My Amama 115,000 btu forced air system (1987) with White-Rodgers
> > > > controller is not reaching its thermostat setting. =A0My thermostat =
is a
> > > > Honeywell set-back model. =A0The furnace has a particular problem in=
the
> > > > morning to raise the temperature from the low temperature that is us=
ed
> > > > at night.
>
> > > > 1. Thermostat calls for heat.
> > > > 2. Induced Draft motor starts
> > > > 3. Furnace makes a clicking noise and ignitor turns on
> > > > 4. Blower turns on.
> > > > 5. High temperature limit turns off burners (after 4 minutes)
>
> How do you know it's the high limit that's turning off the furnace?
> If it is, then that would indicate either there isn't sufficient air
> flow, or the high limit switch is cutting off the furnace at a normal
> operating temp.
>
> It's also easy to rule out if this has anything to do with the
> thermostat. =A0 Set the thermostat way higher than room temp and if the
> furnace still cuts off the same way instead of running, it;s not the
> thermostat.
>
>
>
> > > > 6. Ignitor turns on
> > > > 7. Gas lights and stays on for about (4 minutes)
> > > > 8. Furnace turns off without reaching thermostat setting
>
> > > > I can shut the power off to reset the furnace and it will light off
> > > > again for about 15 minutes again. =A0I have changed the Flame senor =
to
> > > > be sure that it is not causing the problem.
>
> > > > Is there anything anyone has to offer on what might be tripping the
> > > > furnace?- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
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> - Show quoted text -
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