Honeywell T8665A Benutzerhandbuch

41

69-1536–3

continued

Display does not

come on.

Thermostat is not being

powered.

• Check if the batteries are correctly installed.

• Check if the thermostat is mounted and latched on the

    

wallplate—mount and latch the thermostat on the

wallplate.

Temperature setting

does not change

(Example: cannot set

the heating higher or

the cooling lower).

The upper or lower

temperature limits were

reached.

Check that the temperature setpoints are:

     Heating: 40 to 90°F (4 to 32°C)

     Cooling: 55 to 99°F (13 to 37°C).

Heating does not

come on.

System selection is not set to

Heat. Heating setpoint is

below room temperature.

Check that setpoint is above room temperature.

Check if the circuit breaker is tripped—reset the circuit

breaker.

Check if the fuse at your fuse box is blown—replace the

fuse.

Check if the System switch at the equipment is in the

Off position—set to the On position.

Wait five minutes for the system to respond (thermostat

displays “ Wait”).

Set System selection to Heat.

"Filter" flashes in

display.

Indicates a Filter Timer has

expired.

See Display or Reset Filter Timer Settings section to

reset timer.