Troubleshooting Guide - Honeywell T8000C Owner's Manual

Troubleshooting Guide

Symptom
Display does not come on.
Temperature settings do not
change (Example: cannot set the
heating higher or the cooling lower).
• Check if the thermostat is mounted and latched on the
wallplate—mount and latch the thermostat on the
wallplate.
• Check if the circuit breaker is tripped—reset the circuit
breaker.
• Check if the fuse is blown—replace the fuse.
• Check if the switch at the equipment is in the Off
position—set to the On position.
• Check that the temperature setpoints are: between 4 to
37 C (40 to 99 F ).
14
Action
(continued)
69-1437EF