On Tuesday, March 7, 2017 at 1:32:01 PM UTC-5, Bob wrote:
At 7 AM, the "Current room temperature indicator" on the thermostat was 68 degrees.

At 10 AM, the "Current room temperature indicator" was still 68 degrees.

At 10:05 AM, the furnace (finally) turned on.

At 10:30 AM, the "Current room temperature indicator" is now 82 degrees.

Why did it take more than 4 hours for the furnace to come on?


Stop right there. Something isn't right. You say that the house was
at 68 degrees, the furnace finally went on, and in just 25 minutes,
the house is at 82F? The temperature increased 14F in just 25 minutes?
I assume you have sense enough to know if that 82F reading is wrong
and it's actually more like 70F. So, if what you say is true, your furnace
would have to be sized to heat a whole apartment building.