Troubleshooting Guide - Honeywell T8131A Owner's Manual

Troubleshooting Guide

IF...
Display will not come on.
Temperature display will not go lower
than 45 F (7 C) or higher than 88 F
(31 C) during programming.
Temperature change occurs at the
wrong times.
Heating 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.
You have reached the temperature setting limit.
The setting range is 45 F to 88 F (7 C to 31 C).
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.
Check that the green LED is lit.
Check that the switch on the thermostat is set to
HEAT.
32
69-0887—1