Honeywell RTH5100 Operating Instructions Manual page 19

Troubleshooting Tips (Cont)
If . . .
Fan does not
turn on in a
call for heat
(electric
furnaces
only).
Heat pump
puts out cool
air in the heat
mode and
warm air in
the cool
mode (heat
pumps only).
Both the
heating and
cooling
systems are
running at the
same time.
Check Installer Setup Number 3, Fan
Control in Heating, and make sure it is
set to Electric Heat (Setting 1).Refer to
Installation Instructions, 69-1716
Check Installer Setup Number 2, Heat
Pump Changeover Valve, and make sure
the setting matches the changeover
required by the installed heat pump.
Refer to Installation Instructions,
69-1716.
Check Installer Setup Number 1, Heating
and/or Cooling System Type, and make
sure the setting matches the installed
heating and/or cooling system. Refer to
Installation Instructions, 69-1716.
Check and make sure the bare portions
of the wires are not touching.
19
Then . . .
69-1722