TXU Energy iThermostat In-Home User Manual
Troubleshooting Assistance Guide
30
STG 1 is indicated but the unit is not running.
•
Verify the breakers are not tripped for both the air handler and the outdoor
compressor. Reset the breakers. If power is being supplied to the equipment, and
the iThermostat indicates the system is On (STG 1 icon displayed), call your HVAC
contractor.
•
Check whether a curtailment event is currently in progress by looking at the light
next to the up and down arrow buttons. If the light is On, then a curtailment event is
in progress and your air conditioning compressor is temporarily disabled.
•
If outdoor AC breaker is tripped, reset it. If it trips again, call your HVAC contractor.
The fan is On, but no cool air is coming out.
•
Check that the system setting is set to COOL. Press the
SYSTEM
button until the
COOL icon is displayed.
•
Verify that the breakers are not tripped to the outdoor compressor and that the
outdoor compressor and fan is operating. Reset the breakers. If power is being
supplied to the equipment and the iThermostat, and the iThermostat indicates the
system is On (STG 1 shown), call your HVAC contractor.
•
Verify that the iThermostat is calling for cooling, and the outdoor compressor is
running. If cool air is still not being detected from the system, the refrigerant level
may be low. Call your HVAC contractor.
The fan is On, but no hot air is coming from registers.
•
Check that the system setting is set to HEAT. Press the
SYSTEM
button until the
HEAT icon is displayed.
•
Verify that the air handler breaker is not tripped and that the iThermostat indicates
the system is On (STG 1 displayed).
•
If a fossil fuel (oil/gas) furnace, check the furnace burner for visible flame. If no
flame or pilot, call your HVAC contractor.
•
If a heat pump, verify that the outdoor compressor and fan are running. If the
compressor is running and warm air is still not being detected from the system, the
refrigerant level may be low. Call your HVAC contractor.
