Honeywell RTH8500 Installation Manual page 28

Installation Guide
In case of difficulty
Heat pump issues cool
air in heat mode, or
warm air in cool mode
Heating and cooling
equipment running at
the same time (or heat
does not turn off)
Heating system is
running in cool mode
• Check Function 0190: Heat Pump Changeover Valve to make
sure it is properly configured for your system (see page 19).
• Check Function 0170: System Type to make sure it is set to
match your heating and cooling equipment (see page 18).
• Grasp and pull thermostat away from wallplate. Check to make
sure bare wires are not touching each other.
• Check Function 0170: System Type to make sure it is set to
match your heating and cooling equipment (see page 18).