On 1/20/17 12:06 PM, home owner wrote:
trader_4: What do you mean by "span"?


Your Totaline calls it "dead span". See page 17 of user manual at:
https://www.totaline.com/dl/P474-103...Thermostat.pdf

This explanation is quoted from
http://www.hunterfan.com/SupportDocu...bR02102010.pdf

"The span setting regulates when and how long your system will run.
The span has been set at the factory to 2 which will allow
the system to turn on 1 deg.F(.05 deg. C) above or below the set
temperature and run for 1 deg.F (.05 deg.C) above or below the set
temperature.
If your thermostat is set to turn on at 72 in heat mode, with a span
setting of 2, your thermostat will activate your furnace at 71 and
shut it down when it reaches 73. For cooling at 72 with a span of 2,
your air conditioner will activate at 73 and shut down at 71. This
setting can be changed to 1, 2, or 3. 1 will shorten your running time
while 3 will lengthen it."

The issue is the actual turn on & turn off temps should never be
equal. Should be at least 1 deg different, and usually 2 or 3. Some
times also referred to as "hysteresis".

With room temp of 70, and set temp of 82, this is not likely to be
your problem. Most likely it has died of old age, or maybe there is a
wiring problem between it and the furnace. That's why others have said
to short together the white and red wires and see if furnace starts,
or not.

*ALSO*, I just stumbled across the "Factory Reset" instructions at:
https://www.totaline.com/dl/STAT_SETUP_CHEAT_SHEET.pdf

"Factory Reset:
Move Program switch to Set, hold Next to enter setup, press Next to go
to step 2 (€œCy€�), press and hold Next until all icons appear, press
and hold Next until €œFd€� appears. Press Next three times, then move
Program switch. "

Good luck.......