Honeywell RTH5100B - Heating or cooling system does not respond; Cool On or Heat On is flashing

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69-2329EF—03 14
Advanced Installation Guide
Function 2: Heat pump changeover valve
Next
2
0
Done
MCR29541
Press the s or t button to select whether your changeover valve is used
in heating or cooling:
NOTE: If Function 2 does not appear, please turn to the next page to
continue.
0 Cooling changeover valve: Use this setting if you connected a wire
labeled “O” to the O/B W wire terminal (see page 21).
1 Heating changeover valve: Use this setting if you connected a wire
labeled “B” to the O/B W wire terminal (see page 21).
Press to change setting.
When correct setting is
selected, press NEXT to
display next function.
MCR29540