Heating System - Honeywell RTH6400 Series Quick Installation Manual

Advanced Installation Guide
Troubleshooting
Heating
and cooling
equipment
running at the
same time (or
heat does not
turn off)

Heating system

is running in
cool mode
69-2210ES—05
• Check Function 1: System Type to
make sure it is set to match your
heating and cooling equipment
(see page 14).
• Grasp and pull thermostat away
from wallplate. Check to make sure
bare wires are not touching each
other (see page 6).
• Check Function 1: System Type to
make sure it is set to match your
heating and cooling equipment
(see page 14).
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