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NOTICE:
This equipment is a Class B digital apparatus,
which complies with Canadian Radio Interference
Regulations, CRC c. 1374.
TROUBLESHOOTING GUIDE
Symptom
Display will not
come on.
Temperature
settings will
not change
(Example:
cannot set the
heating higher
or the cooling
lower).
"Filter" flashing
in display.
Action
• 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 system switch at the
equipment is in the Off position—set to
the On position.
• Check wiring between thermostat
and HVAC equipment—replace any
broken wires.
• If 24 Vac is present, proceed with
troubleshooting.
• Check that the temperature
setpoints are:
- heating: 40 to 90°F (7 to 31°C)
- cooling: 45 to 99°F (9 to 37°C).
• Indicates a filter timer needs to be reset
-
See View and Reset Timer Settings
instructions.
23
(Continued)
69-1400–1
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