"." wrote in message
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The temperature in my home is always either too hot or too cold so I
suspect the programmable thermostat is not set correctly.

The owner's manual mentions "set point" but it's not clear what that
means.

Is the "setpoint" the temperature at which the furnace (or air
conditioner) turns on or turns off?


The set point is the number on the thermostat you see. It is the number
that you put the dial on or if digital , the number you adjust up and down.

If programmable, you probably have several Set Points. That is the
temperature you want the house to be at the time you want.

Say you leave the house at 8:00 every day, you may want to have the
setpoint at 65 deg. If you come home at 5:00 then about 4 or 4:40 you want
to move the set point back to 70 deg so the house will be at 70 deg when you
get home. Then about 10 at night you may want to have the set point at 68
deg for sleep. Then about 5 in the morning you may want to have the set
point at 70 so the house will be warm when you get up.

You will have to adjust the set point to match the temperature you are
comfortabel at. Give the house an hour or two for each degree you move the
set point while trying to find a confortable temperature while you are in
the house.