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Honeywell T8775C Support Question

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Question posted by sjp1965 on October 27th, 2012

Honeywell T8775c Not Adjusting To Thermostat Setting

My room temperature is 69 and my thermostat is set on 77. Why will the room temp. not reach the thermostat setting?

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Related Honeywell T8775C Manual Pages

Owner's Manual - Page 1

Owner's Manual - Page 2

DISPLAYS AND ADJUSTS TEMPERATURE SETTING/TURNS BACKLIGHT ON M19470 Fig. 1. (T8775C ONLY) SELECTS COOL/OFF/HEAT (T8775C ONLY) SELECTS ON/AUTO ROOM SHOWS THAT THE SET CURRENT ROOM TEMPERATURE IS DISPLAYED. T8775 Thermostat (features and operation). 69-1679EF-1 2 DISPLAYS ROOM OR SET TEMPERATURE SHOWS THAT THE CURRENT TEMPERATURE SETTING IS DISPLAYED.

Owner's Manual - Page 3

... in cooling mode when the outdoor temperature is below 50°F (10°C), or damage to compressor could result. The fan only runs with ❑ On: the heating and cooling system. Setting SYSTEM and FAN Switches (T8775C only) ❑ System and Fan settings are off. ❑ Cool: The thermostat controls your heating system. ❑ Off...

Owner's Manual - Page 4

...ROOM SET M19490 69-1679EF-1 4 Backlit Display ❑ The backlight can be turned on by turning the dial, or by pushing the backlight button as shown in cooling (T8775C only). ❑ Turn the dial one click to display the current temperature setting. A indicator points to Room when the room temperature is displayed. Display Temperature Setting NOTE: Your temperature setting can be set...

Owner's Manual - Page 5

...(T8775C only). 5 69-1679EF-1 See equipment manufacturer instructions. Adjust Temperature Setting ❑ To lower the temperature setting, turn the dial counterclockwise. ❑ To raise the temperature setting, turn the dial clockwise. Allow compressor to compressor or other equipment. Heating or cooling does not come on. ❑ Make sure that the SYSTEM switch on the thermostat...

Owner's Manual - Page 6

... the display (T8775C only). The snowflake will go into a five-minute delay to protect the compressor. ❑ In heating, make sure the temperature setting is above the room temperature and the flame is present in the display. ❑ In cooling, make sure the temperature setting is below the room temperature and a solid snowflake is running, the thermostat will flash during...

Owner's Manual - Page 8

Automation and Control Solutions Honeywell International Inc. Rev. 6-04 Printed in Mexico www.honeywell.com/yourhome Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 69-1679EF-1 J.S.