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Electronic Thermostat Room SYSTEM Cool Off Heat Auto On OWNER’S GUIDE M18535 Em Ht Aux Ht Room SYSTEM Auto On Cool Off Heat Em.Ht. M18539 69-1490 69-1490...
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Congratulations on the purchase of your new thermostat! Over 100 years of Honeywell engineering expertise went into the making of this thermostat in an effort to provide you with a more comfortable and convenient living environment. • Simple and easy to use easy for you to change your temperature setting.
Settings Setting FAN and SYSTEM Switches Fan and system settings are controlled by using FAN and SYSTEM switches located on the bottom of the thermostat case. First set the FAN switch: Auto: Normal setting for most homes. In cooling, the fan goes off and on with the cooling equipment.
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Digital display shows a flame when heating is on. Em. Ht.: (Not available on all models.) Switch to this setting when your home needs heat, but your equipment has failed or is not working properly. 69-1490 SYSTEM Cool Off Heat Em.Ht. SYSTEM SWITCH when cooling is on.
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SYSTEM switch is set at Em Ht. Aux Ht: living space needs auxiliary backup heat to help handle the heating load. indicator points to Em Ht when the indicator points to Aux Ht when the INDICATOR Em Ht indicator Room M18425 69-1490...
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The indicator points to Set when the temperature setting is displayed and to Room when the room temperature is displayed. 1. To display the temperature setting on the digital display, press either the key once. Room INDICATOR M18441 69-1490...
2. To raise the temperature setting, press the When in the cooling mode, raising the temperature before you leave for work or school also lowers your energy costs. Room M18442 Room M18443 key. key. 69-1490...
If you like saving energy, but would like your thermostat to automatically change the temperature setting, you might want to consider purchasing the Honeywell Chronotherm® Programmable Thermostat. With this thermostat, temperature settings can be conveniently programmed to automatically save energy.
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10°F (5°C) DECREASE* 12 TO 16% 18 TO 22% 23 TO 25% 25 TO 29% UP TO 30% SAVINGS FOR TWICE-A-DAY 10°F (5°C) INCREASE* 11 TO 15% 16 TO 18% 19 TO 22% 23 TO 33% 69-1490 HEAT COOL M10278...
(10°C). See equipment manufacturer instructions. Heating or cooling does not come on. Temperature setting is too warm or cool. 69-1490 • Check that the SYSTEM switch on the thermostat is set to Heat or Cool. • Check the system fuse or circuit breaker and replace or reset if necessary.
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If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday, 7:00 am-5:30 pm, Central time. For service, contact your local heating and cooling contractor: 69-1490...