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Troubleshooting Guide
IF...
Display will not come on.
Display flashes during
programming.
Display flashes during
operation.
Program is lost due to
power outage.
Temperature change occurs
at the wrong times.
THEN...
Check that heat or cool system power is on. If you use batteries, replace with
fresh ones.
Make sure thermostat is correctly mounted on base.
You have reached the temperature setting limit. The setting range is 45 F to 88 F.
Check that the COOL temperature setting is at least 3 F above the HEAT
temperature setting.
Programming has been lost because of a power outage. You must reprogram.
Check that backup batteries are installed correctly. Replace if necessary.
Reprogram the thermostat.
Check the program times for the period in question. Be sure that AM and PM
indications are correct. Make sure the current day and time are correct. Repro-
gram if necessary.
23
69-0819
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