Honeywell T8624 Owner's Manual - Page 48

4. How long does the HOLD key hold? Forever! The HOLD key will hold the temperature indefinitely. The only way to release it is to push the RUN PROGRAM key or change the system switch positions if applicable. 5. How can this thermostat save energy when it comes on and off so many times early in the morning hours? Two ways. First, it saves energy (and money) by setting back the temperature for blocks of time during the day or night. Second, it conserves energy by recovering gradually to the desired temperature. This prevents overshooting your comfort set point (and wasting energy) or undershooting the comfort set point (and forcing you to change the thermostat setting, also wasting energy). 6. Why don't all thermostat models have AUTO (automatic) changeover from heating to cooling? Most parts of the country don't have wide temperature swings during a 24-hour period, so it is not necessary. Desert climates, such as Phoenix, are the exception because of wide variations in temperature that may require both the air conditioner and furnace to run during different times within a given 24-hour period. 7. Sometimes my Chronotherm III Thermostat doesn't allow the house temperature to drop to my SLEEP setting before it starts bringing the furnace on. Why? When you start your SLEEP period, the thermostat will turn off your furnace and your house temperature will start to fall. After that, the thermostat does nothing until the house temperature falls all the way to your SLEEP temperature setting or until recovery starts. In mild weather or with good insulation, your house temperature may not fall all the way to your SLEEP temperature setting and the thermostat won't turn on your furnace until the time to recover back up to your comfort setting. CHRONOTHERM III 42 THERMOSTAT QUESTIONS