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Question posted by lauririvetti on September 7th, 2014

Honeywell T8602c Thermostat. It Says 'replace Batteries'.

I have replaced the batteries 3 times and it still says "Replace Batteries". Fan will go on, but the air conditioning will not. The wall unit is old. Might need a new one? We just had the compressor replaced, so I know that is in working condition. Thanks for your help. Lauri Rivetti

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Related Honeywell T8602C Manual Pages

Owner's Manual - Page 1

Owner's Manual - Page 2

... THERMOSTAT FEATURES • Program up to four time periods and temperature setpoints for each daily schedule. • Set different schedules for each day of the week. • Backlit for easy readability of display when a key is pressed. • Press Information key for present setting information and outdoor temperature (select models). • Select fan...

Owner's Manual - Page 3

... 56 temperature settings). The Hold Temp key provides energy efficient operation for each day of time. The fan setting feature is located behind the thermostat cover with three frequently used keys by the display. The thermostat can use the following charts to increase your program schedule. The s and t keys provide quick temporary temperature changes...

Owner's Manual - Page 4

DELUXE PROGRAMMABLE THERMOSTAT Period Start Time Monday Wake [6:00 AM] Leave [8:00 AM] Return [6:00 PM] Sleep [10:00 ...78°F (25.5°C)] [82°F (28°C)] [78°F (25.5°C)] [85°F (29.5°C)] [78°F (25.5°C)] [82°F (28°C)] Fan Setting [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto] [Auto]...

Owner's Manual - Page 5

... Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Tue PM M14620 3. NOTE: Tapping the Set Current Day/Time will change the time in one hour increments. Press Run Program. DELUXE PROGRAMMABLE THERMOSTAT Setting the Current Day and Time IMPORTANT Always press the...

Owner's Manual - Page 6

... the heating or cooling equipment is dis- DELUXE PROGRAMMABLE THERMOSTAT Programming the First Day Start by programming the Wake time and temperature (and fan operation on select models) for the entire period. 69-1400-1 6 Time Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System...

Owner's Manual - Page 8

... Wake. Wake Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Set Program Mon Tue Wake Setting System Em Heat AM Fan Heat Auto M14642 2. M14646 69-1400-1 8 DELUXE PROGRAMMABLE THERMOSTAT Copying a Day NOTE: The thermostat must be in the program mode...

Owner's Manual - Page 9

... Program Period NOTE: The thermostat must be in the program mode. 1. Press Wake, Leave, Return or Sleep. Setting System Heat AM Heat Fan On M14647 Day Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Set Program AM Sat Leave Setting...

Owner's Manual - Page 10

... DELUXE PROGRAMMABLE THERMOSTAT Setting Temporary Temperatures Changing Temperature Setting Until the Next Program Period Press increase s or decrease t key until the desired temperature setpoint is displayed for approximately 3 seconds. Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Setting...

Owner's Manual - Page 11

... program will start. (Example: Return = thermostat will stop the Hold at the Return period start time) Setting System Heat Return Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Hold for Auto, both heat and cool settings are needed . 11 69-1400-1

Owner's Manual - Page 12

...the program. The fan settings can be cancelled before the designated time, press Run Program to return to Auto. Fan settings control the system fan as follows: Heat: The thermostat controls the heating....Settings to change the settings. The thermostat will operate when the room temperature is set for all the program periods. IMPORTANT If the Hold needs to be set for eighteen days ...

Owner's Manual - Page 13

... pressing the key until the next regularly scheduled period starts. DELUXE PROGRAMMABLE THERMOSTAT Setting Temporary Fan Operation If your original setting. 13 69-1400-1 Press the Time s key to your thermostat has a Fan key and this feature, press Fan until the timer resets. 1. This fan setting will go back one hour and the display will show sequentially...

Owner's Manual - Page 14

... wall, remove the thermostat by placing your thermostat is equipped with an outdoor sensor, you can check the temperature at the sensor by pressing once. Replace the batteries as soon as shown. Run Program Set Current Day/Time Hold Temp Day Daylight Time Time Wake Set Program Leave Return Heat/Cool Settings Copy System Sleep Fan Outdoor M14660 Replacing the Batteries...

Owner's Manual - Page 15

... hot or cold the room actually feels to a human being. • Your new thermostat reads both the temperature of the wall and the air-and responds to temperature changes as little as long. M15084 15 69-1400-1 DELUXE PROGRAMMABLE THERMOSTAT If you insert new batteries within 20 to you and your family. If the display is more...

Owner's Manual - Page 16

Each day it checks how closely it considers (1) air temperature, (2) wall temperature, and (3) the time you want the comfort temperature established. • During the Adaptive Intelligent Recovery™ time, the thermostat increases the temperature setpoint from the energy savings to the comfort temperature. The thermostat comes preset to avoid going past the comfort temperature....

Owner's Manual - Page 17

...DELUXE PROGRAMMABLE THERMOSTAT Saving Energy Across the United States and...long to 30% in summer for eight hours. • If the time period you choose for 5°F (3°) summer increase 30% 28% 26% 24... 16% 14% 12% 10% 8% 6% 4% 2% Minneapolis St. Louis Columbus New York Philadelphia Seattle Louisville Portland Wash., D C San Francisco Dallas Atlanta Los Angeles ...

Owner's Manual - Page 18

...THERMOSTAT TROUBLESHOOTING GUIDE Symptom Action Display will not come on. • Check if the thermostat is mounted and latched on the wallplate-mount and latch the thermostat... on . • Check that setpoint is below room temperature. • Check if the circuit breaker is tripped-reset the circuit breaker. • Check if the fuse is blown-replace...needs...replace...replace... replace...

Owner's Manual - Page 19

... time. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. to you. DELUXE PROGRAMMABLE THERMOSTAT WARRANTY Honeywell warrants this product, excluding battery, to you. If, at any time ... If the product is defective or malfunctions, Honeywell shall repair or replace it , postage prepaid, to the following address: Honeywell Return Goods Dock 4 MN10-3860 1885 Douglas...

Owner's Manual - Page 20

DELUXE PROGRAMMABLE THERMOSTAT Automation and Control Solutions Honeywell International Inc. Rev. 12-02 Printed in U.S.A. on recycled paper containing at least 10% www.honeywell.com/yourhome post-consumer paper fibers. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 69-1400-1 G.H.