Reset Operation
Troubleshooting Guide • 31
Furnace (Air Conditioner) Cycles Too Fast or Too Slow (Narrow or Wide Temperature Swing)
Second and Third Stage Won’t Come On
10.1.Reset Operation
If a voltage spike or static discharge blanks out the
display or causes erratic thermostat operation, you
can cycle the thermostat power by unplugging the
thermostat from the baseplate for a few seconds then
plugging the thermostat back onto the mounting plate.
Possible Cause
Corrective Action
The location of the thermostat and/or the size of
the heating system may be influencing the cycle
rate.
Digital thermostats normally provide precise temperature control
and may cycle faster than some older mechanical models. A faster
cycle rate means the unit turns on and off more frequently, but runs
for a shorter time so there is no increase in energy use. If you would
like to increase the cycle time, choose Economy for slow cycle in
the menu.
Table 10-7
- Furnace (Air Conditioner) Cycles Too Fast or Too Slow (Narrow or Wide Temperature Swing)
Possible Cause
Corrective Action
Your thermostat is designed to determine the
optimum time to activate the second stage.
Simply raising the temperature in heating or
lowering it in cooling will not always force the
thermostat to bring the second stage on quickly.
There is a time delay from 0-30 minutes
depending on the performance of the first stage of
the system.
Wait for the second or third stage to come on.
Table 10-8
- Second and Third Stage Won’t Come On
