In Case Of Difficulty - Honeywell VisionPRO IAQ Operating Manual

VisionPRO ® IAQ

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 • Check to make sure the thermostat is not locked (see page 26).
key presses (or
Make sure heating and cooling temperatures are set to acceptable ranges:
temperature
• Heat: 40° to 90°F (4.5° to 32°C).
will not
change) • 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.
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