Venstar T1900 Installation - Manual (Page 24)

SYMPTOM: When controlling a residential heat pump,
and asking for cooling, the heat comes on.
CAUSE: The thermostat reversing valve jumper is set
for “b”.
REMEDY: Set the reversing valve jumper for “O”. See
pages 5.4 and 5.5.
SYMPTOM: When calling for cooling, both the heat
and cool come on.
CAUSE: The thermostat equipment jumper is configured
for “HP” and the HVAC unit is a Gas/Electric.
REMEDY: Set the equipment jumper for “Gas”. See
pages 5.2 and 5.3.
P/N 88-600
Rev. 1
Page 8.2
8
TroubleShooting
AUTO
I2:00 Pm
HEAT COOL 72
74
AUTO
I2:00 Pm HEAT COOL 72
74