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PROBLEM SOLUTION
Heat will not come on but the
symbol is animated.
Air conditioning will not come on.
Air conditioning will not come on
but the symbol is animated.
Thermostat turns the heating /
cooling systems on before my
programmed set times.
Heating system seems to cycle
too often.
1) Check if the furnace switch and/or pilot flame is turned on, as it may have been turned off.
2) Allow several minutes for the heating system to heat up and the fan to activate. Most heaters will heat
up the system for a short while before warm air can be ventilated by the fan. Also check that the
HE/HG setting is set correctly. (Refer to page 16).
3) If the heat still does not come on, check the wiring installation again. (Refer to pages 28 and 29).
1) Check and ensure that the thermostat is set to the COOL or AUTO mode.
2) Check and ensure that the set temperature is lower than the current (room) temperature.
3) You may have to wait up to 5 minutes before the air conditioning will turn on. The thermostat has a
built-in time delay to protect the air conditioner compressor from undesirable on/off sequences.
4) After a 5-minute wait, the air conditioning should now be on. Whenever the cooling system is
running, the symbol will be animated.
1) Check if the air conditioning system’s main switch is turned on, as it may have been turned off.
2) Wait several minutes for the air conditioning system to activate. If the air conditioning still does not
come on, check the wiring installation again. (Refer to pages 28 and 29).
- This is normal if the Pre-comfort Recovery system is enabled. The Pre-comfort Recovery will activate
the heating/cooling in advance of the actual programmed set time so that the room will be at the desired
temperature at the start of the comfort program time. You may disable this feature in the optional
settings. (Refer to page 16).
- Check and ensure that you have selected a Cycle Rate that matches your particular heating system.
(Refer to page 15). The default is set at Cr-3 for gas or oil forced air systems. If you find it still cycling
too often, you may wish to try a slower cycle rate or disable the cycling. When disabled, the
thermostat will operate at a fixed span of ±0.5°C (±1.0°F). For example, if the programmed
temperature is set at 20°C (68°F), the thermostat will turn the heat on if the current (room) temperature
falls below 19.5°C (67°F) and turn the heat off when the current (room) temperature reaches 20.5°C
(69°F).
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