Quick Start Guide

17
Troubleshooting
Usethefollowingtroubleshootingguidetodiagnosecommon
problems. If you are still having problems or are unsure please
visit www.venstar.com/thermostats or e-mail customer service at
[e-mail]
Problem
The air conditioning does
not attempt to turn on.
The display is blank.
The heating does not
attempt to turn on.
When using a residential
heat pump the heat comes
on instead of the air
conditioning.
When calling for air
conditioning both the heat
and cool come on.
Possible Cause
The compressor timer
lockout may prevent the air
conditioner from turning on
for a period of time.
The cooling setpoint is set
too high.
You may have selected Free
Cooling in settings.
Lackofproperpower.
The heating setpoint is set
too low.
The thermostat reversing
valve dip switch is set
incorrectly.
The thermostat equipment
dip switch is configured for
“HP”andtheHVACunitisa
gas/electric.
Solution
Adjustthe
CompressorMin.OTIme
to“None”.
Lowerthecoolingsetpoint
or lower the cooling
setpoint limit.
Ifyoudon’thaveadamper,
and special duct work
installed,turnothis
feature in settings.
Makesurethepower
is on to the furnace
and that you have a 24 vac
between R&C.
Raise the
heating setpoint or raise
the heating setpoint limit.
Setthereversingvalvedip
switch to the opposite
position.
Settheequipmentdip
switchfor“gas”.