Honeywell T8131A Programmable Thermostat Owner’s Manual
Troubleshooting Guide
IF…
Display will not come on.
THEN…
■ Check that the green light emitting diode (LED)
located to the left of the LCD is lit, indicating the
thermostat is powered properly.
Temperature display will not go lower
than 45°F (7°C) or higher than 88°F
(31°C) during programming.
■ You have reached the temperature setting limit.
The setting range is 45°F to 88°F (7°C to 31°C).
Temperature change occurs at the
wrong times.
■ 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. Reprogram if necessary.
Heating will not come on.
■ Check that the green LED is lit.
■ Check that the switch on the thermostat is set to
HEAT.
18
69-1636-1
| General | Details |
|---|---|
| Name | Honeywell T8131A Programmable Thermostat Owner’s Manual |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.15 MB |

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