"Walter R." wrote in message
We hate this Honeywell T-stat: When it comes on in the morning, the
temperature at the t-stat rises much more quickly than the room
temperature. Because the thermostat is usually 4 degrees ahead of the room
temperature it shuts the furnace off too quickly. The actual room temp may
be 70 but the t-stat reads 74. Since the t-stat was set to shut off at 74,
the furnace stops, although the room temp is only 70. It then keeps
cycling on/off and high/low until it reaches 74 degrees 2 hours later.

Honeywell has a good reputation. But, when I called them, the tech said
that it is normal for their t-stats to vary as much as 5 degrees from the
actual room temperature. He said this is normal for all Honeywell digital
t-stats. I told him this was ridiculous.

My Honeywell does not vary even 1 degree. If it is still under warranty and
is truly off, I'd take it back for a new one. 5 degrees is too much, IMO,
in the digital age.

OTOH, how about the location? Is it being affected by either a direct blast
of heated air or something else that is giving it a false reading? How are
you getting the 70 degree reading? Hang a thermometer right next to it and
see the reading at that location.

You must be doing well if you can afford to heat to 74 degrees.