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TROUBLESHOOTING GUIDE
IF... THEN…
Display will not come on. • There is no power applied to the thermostat. Check fuse or
circuit breaker.
Temperature display will not •You have reached the temperature setting limit. The setting
go lower than 45°F or higher range is 45°F to 88°F.
than 88°F during programming.
Temperature change occurs • Check the program times for the period in question. Be sure
incorrectly. that AM and PM indications are correct. Make sure the current
day and time are correct. Reprogram if necessary.
• Remember that it takes time for the system to recover. Refer
to Recovery from Setback section.