Honeywell RTH8580WF - Page 65

63 69-2715ES—01
Troubleshooting
Heat pump
issues cool air
in heat mode,
or warm air in
cool mode
• CheckFunction 0190: Heat Pump Changeover Valve to make sure it is
properly configured for your system (see page 55).
Button on
lower right of
screen is blank
• Thisbuttonwillremainblankunlessthefurnacefilterchangereminderis
activated (see page 44).
Red light is on • IfthermostatisinEmergencyHeatmodetheredlightisnormal.Itshows
that the thermostat is in emergency heat mode.
• IfthermostatisnotinEmergencyHeatmode,contactaqualifiedservice
contractor for repair.