28
69-0939—1
TROUBLESHOOTING GUIDE
I F …
THEN…
Display will not
come on.
•
Check that the batteries are installed correctly and fresh.
•
Check if the thermostat is mounted and latched on the wallplate—mount and latch the
thermostat on the wallplate.
Temperature settings
will not change
(Example: cannot set
the heating higher or
the cooling lower).
•
Check that the temperature setpoints are:
— heating: 40 to 90
°
F (4.5 to 32
°
C)
— cooling: 45 to 99
°
F (7 to 35
°
C).
Heating will not
come on.
•
Check that heat setpoint is above room temperature.
•
Check if the circuit breaker is tripped—reset the circuit breaker.
•
Check if the system switch at the equipment is in the Off position—set to On position.
•
Wait five minutes for the system to respond.
•
Set system switch to Heat.
