Honeywell T7516B Owner's Manual - Page 61

Troubleshooting - air filters

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Troubleshooting IF... THEN... Display does not come on. • There is no power being supplied to the thermostat. Check fuse or circuit breaker. • Check the furnace air filter. A dirty filter will choke the airflow causing safety shutdown; replace or clean, if necessary. Temperature display does • You have reached the thermostat setting limit. The setting not go lower than 45°F or range is 45°F to 88°F. higher than 88°F during programming. Temperature change occurs at the wrong time. • Check programming for the period in question. Be sure the time-including AM/PM indication-is correct. Reprogram if necessary. • Keep in mind that it takes time for the system to recover. Refer to the Recovery from Setback section for details. (continued) 61 69-1611

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61
69-1611
Troubleshooting
(continued)
IF°
THEN°
Display does not come on.
±
There is no power being supplied to the thermostat. Check fuse
or circuit breaker.
±
Check the furnace air filter. A dirty filter will choke the airflow
causing safety shutdown; replace or clean, if necessary.
Temperature display does
not go lower than 45±F or
higher than 88±F during
programming.
±
You have reached the thermostat setting limit. The setting
range is 45³F to 88³F.
Temperature change
occurs at the wrong time.
±
Check programming for the period in question. Be sure the
time°including AM/PM indication°is correct. Reprogram if
necessary.
±
Keep in mind that it takes time for the system to recover.
Refer to
the Recovery from Setback section for details.