VisionPRO®
THBDDD
Series
il'nct.ise
.•.•..•
of· ·diffi(;ulty
Heating
or
cooling
system
does
not
respond
Display
shows
Fan
Auto
and
On
or
Auto
and
eirc
at
the
same
time
• Press
SYSTEM
to
set system
to
Heat. Make sure the temperature is set
higher than the Inside temperature.
• Press
SYSTEM
to
set system
to
Cool. Make sure the temperature is set
lower than the Inside temperature.
• Check circuit breaker and reset
if
necessary.
• Make sure power switch at heating
&cooling system is on.
• Make sure furnace
door
is closed securely.
•
If
"Wait" is displayed, the compressor protection timer is on. Wait
5 minutes for the system
to
restart safely, without damaging the
compressor (see page 15).
• This is normal operation. Auto indicates the thermostat is following the
programmed fan setting. If Auto and
On
is shown, the fan is scheduled
for
"On" during this period (see page
7).
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