VisionPRO
®
IAQ
27
In case of difficulty
If you have difficulty with your thermostat, please try the suggestions below.
Most problems can be corrected quickly and easily.
Display is blank
•
Check circuit breaker and reset if necessary.
•
Make sure power switch at heating & cooling system is on.
•
Make sure furnace door is closed securely.
No response to
key presses (or
temperature
will not
change)
•
Check to make sure the thermostat is not locked (see page 26).
Make sure heating and cooling temperatures are set to acceptable ranges:
•
Heat: 40° to 90°F (4.5° to 32°C).
•
Cool: 50° to 99°F (10° to 37°C).
Backlight is dim
•
A dim display is normal. The backlight remains on at a low level, and
brightens when a key is pressed.
