Appendix; In Case Of Difficulty - homexpert THR842DUK User Manual

Appendix

In case of difficulty

Thermostat screen • Make sure two fresh AA alkaline batteries are properly installed (see
is blank page 16).
Heating or cooling • Check thermostat batteries (see above).
system does not
• Make sure heating and cooling systems have power. Check fuses and
respond
circuit breakers and replace or reset as needed.
• Check wiring (pages 14-15) and system configuration (pages 21-25).
• If red light on relay box is on, the thermostat and relay box may have lost
communication with each other. Check for metal objects or other devices
that may block or interfere with the wireless signal. Try the test procedures
described on pages 16-20.
• If above remedies cannot resolve the problem, the thermostat may
have to be moved. Try a location closer to the relay box, or farther
away from interference by metal objects or electronic devices such as
televisions, sound systems, PCs, etc.
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In case of difficulty
Desired temperature • If remedies described on page 26 cannot resolve the problem, the
cannot be maintained thermostat may have to be moved. Make sure it is not installed near
sources of hot or cold air (radiators, windows, heating or cooling
ducts).
If this symbol flashes on the screen during normal operation, a fault has
occurred.
• Press the button on the relay box to illuminate the green light and
temporarily restore system function. This is a manual override which will
not correct the fault; it will only allow the system to provide heat until
the fault is corrected.
• If the problem cannot be corrected, contact Honeywell Customer Care
for assistance (see back cover for contact information).
homexpert by Honeywell THR842DUK Wireless Digital Thermostat
tm
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