Troubleshooting - Honeywell UtilityPRO Series Operating Manual

Operating Manual

Troubleshooting

If you have difficulty with your thermostat, please try the following.
Most problems can be corrected quickly and easily.
Display is blank
No response to
key presses (or
temperature
does not
change)
Backlight is dim
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is ON.
• Make sure furnace door is closed securely.
• Check to make sure the thermostat is not locked (see page 18).
• 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)
• If thermostat is AC powered, a dim display is normal. The backlight
remains ON at a low level, and brightens when a key is pressed.
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