My furnace seems to be running all right, but, one thing has me
I've got a Honeywell stat that is supposed to have "smart recovery"
that learns the amount of time necessary to re heat in the morning.
It takes the furnace about an hr to get back up from 57 to the 69 I
ask for in the morning with the outside temp in the single to teen
In the mornings the heat will turn on around 6 to have the house warm
by 7. The odd thing is that the furnace will run for about 30 minutes
or more, then it will then stop for about a minute or 2 then turn
back on continuing to heat. At the time the furnace turns off it
might have raised the temp from 57 to 65 or so, on its way to 69.
The stat has a "heat" indicator on the display and while it is
blinking "recovery" indicating that the system is trying to re heat
the house, the "heat" indicator will turn off.
The fan will run for a few minutes after the heat indicator turns
off, then the whole system will sit for a minute or too, then it will
turn back on, and work its way back up to the desired temp.
Is this normal? should the furnace not run straight thru up until it
reaches the desired temp?
I've got an older (17 yrs??) furnace Thermo Pride Furnace which I
believe has an 80% efficiency (based on btu IN/OUT calcs on the
stickers. The house is about 30 yrs old 2200 sq/ft.
Thanks for any and all comments / info
I would not call it normal (Maybe for a heat pump, they often have a few
special tricks to reduce heating cost).
There may be a problem with the furnace (sounds like a gas furnace).
Maybe it is detecting a overheat situation at the burner. That could be a
In all fairness, I am making a lot of guesses here, but I suspect you
will need to have someone check out the furnace. If it needs repair, I
would consider a newer high efficiency furnace as it may not pay to repair
that lower efficiency one in the long run.
It isn't a problem with the furnace, because he said that when this
happens, the "heat" indicator on the thermostat goes out and the
recovery indicator stays on. If it were the furnace, the heat
indicator on the thermostat would not change.
I think the service menu that Tony is referring to is the advanced
settings menu in the thermostat. Some of the HW thermostats, like
the LCD touchscreeen (8600?) ones have a zillion settings. It's
possible something in there controls this. Like maybe it's set for
some dual fuel system option, where it uses one fuel to get most of
the way, then switches.
If you can't find a setting, I'd contact HW or look on their FAQ page,
etc. My vote is this isn't right, and it's either a setting or a
software bug, but it's not a failure in the thermostat.
I should have provided some more info,
it is a gas furnace, I have a gas water heater, and gas stove. The
furnace had the exhaust fan and ignitor unit replaced earlier this year
under home warrenty. I have a few vents closed currently to prevent
heating of unused rooms.
That was my thinking too, that if the heat indicator went off on the stat,
that it was not the furnace that was at fault, it was the stat. A friend
of mine (who had not looked at it) suggested that maybe the furnace was
overheating, but, given the situation with the stat, I was skeptical of
that possibility. Unless the funace had some overheating sensor that fed to
the stat that turned of the stat, instead of just stopping the furnace
leaving the stat still calling for heat.
That all said, I do have a few vents closed in spare bedrooms and all the
vents in the unfinished basement.
I will look into the stats menu settings, it doesn't seem like there is a
lot there, this is a lower end model, it doesn't even record the run times
for the past day/week/period.
What you describe may be normal. My furnace comes on in the morning and
runs for about half an hour. This raises the air temp in the house to 68,
the setpoint. The furnace shuts off. The walls, floors, ceilings et c. are
still cold. The thermostat is mounted next to a wall. Until the wall is
heated up the furnace keeps cycling quickly. It seems to take slightly more
than an hour and a half to heat up the interior walls. So the furnace does
run a lot first thing in the morning
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