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Question posted by bhugg137 on November 19th, 2011

Display Screen Is Blank After Changing Batteries

The display screen showed LO which we took to mean the batteries were low even though the manual doesn't mention LO as a display for battery replacement. We changed the batteries and now the display is blank

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Answer #1: Posted by ericjdolen on September 17th, 2017 7:59 AM

ericjdolen

Member since:
September 17th, 2017

Points: 10

110
points

Noticed batteries not touching both contacts- simply took small screwdriver and gently pried both terminals out so solid contact made on each end. Problem solved. Should have been designed with a spring terminal on the negative side

Related Honeywell CT3600 Manual Pages

Owner's Manual - Page 1

... ...20 Smart Response™ Technology ...21 Wiring Diagrams ...22 ® U.S. Mount Thermostat Wallplate ...7 Step 4. Set the Clock ...13 Step 10. Honeywell CT3600/CT3697 PROGRAMMABLE THERMOSTAT OWNER'S GUIDE Seven Day Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Wallplate Model CT3600/CT3697 Para obtener un documento con las instrucciones en españ...

Owner's Manual - Page 2

... comfort and convenience. This manual answers many of an old control containing mercury in a sealed tube. Failure to have the house at the desired comfort temperature by purchasing your own. Contact your local waste management authority for instructions regarding recycling and the proper disposal of this thermostat is replacing a control that contains mercury...

Owner's Manual - Page 3

... OR BACK SET CURRENT DAY/TIME SETS CURRENT TIME AND DAY RUN PROGRAM RETURNS THERMOSTAT TO NORMAL OPERATING MODE Run Program Set Current Day/Time Time Wake Set Program Leave Return DIGITAL DISPLAY RAISES TEMPERATURE SETTING LOWERS TEMPERATURE SETTING DISPLAYS CURRENT HEAT/COOL TEMPERATURE SETTING PROGRAM PERIODS WAKE/LEAVE/RETURN/SLEEP: ENTERS PROGRAMMING...

Owner's Manual - Page 4

... System DST Em Heat Off Cool Auto Wait SHOWS THE TEMPERATURE DISPLAYED IS THE CURRENT SET TEMPERATURE SHOWS THE TEMPERATURE DISPLAYED IS THE CURRENT ROOM TEMPERATURE SHOWS THE BATTERIES ARE LOW AND MUST BE REPLACED SHOWS CURRENT SYSTEM KEY POSITION HEAT/OFF/COOL DISPLAYS EITHER ROOM OR SET TEMPERATURES SHOWS THAT THERMOSTAT IS "CALLING" FOR HEAT OR COOL SHOWS SMART RESPONSE IS OFF.

Owner's Manual - Page 5

...120/240 line volt)c Single Stage Heat Pump Multistage Heat Pumps/Multistage Equipment Compatibility with CT3600/ CT3697 Yes Yes Yesa Yes Yesa Yes Yes Yes No Yes No a Compatible with...your system. PREPARE FOR INSTALLATION ❑ Check Table 1, the compatibility chart, to make sure the thermostat is not compatible, call Honeywell Customer Relations Center, toll-free, 1-800-468-1502. c Not...

Owner's Manual - Page 7

...(provided) anchors into each of the wallplate and the thermostat, and pulling the wallplate up and away from the thermostat. Thermostat functions properly when not level. ❑ Tighten mounting screws...the wallplate for appearance if desired. Pull the wires through the wiring opening. MOUNT THERMOSTAT WALLPLATE ❑ Separate the wallplate from the wall. holes in wall (if drywall)...

Owner's Manual - Page 9

... the positive terminals all point up (see illustration). ❑ If the thermostat is already mounted on the wall, remove the thermostat by placing your thumb between the thermostat and wallplate and pulling the thermostat up and away as shown. 9 WALLPLATE B R RC O W Y G INSTALL 3 AA ALKALINE BATTERIES AS SHOWN, POSITIVE (+) TERMINALS TOWARD TOP. Call 1-800-468-1502...

Owner's Manual - Page 10

... a month, change batteries before the batteries run out completely. Refer to lack of battery power in the thermostat. The E setting allows the fan to lack of removing the old batteries, the system retains the current time and day. They also can leak, causing damage to 30 seconds of power. If the display is blank, the batteries are running low, a REPL...

Owner's Manual - Page 11

...type options are : - ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE. CUSTOMIZE YOUR THERMOSTAT Your Honeywell CT3600/CT3697 Thermostat comes preset to the most commonly used settings. IMPORTANT ...hold down , , and , simultaneously until the screen shows. MOUNT THE THERMOSTAT A. Sharp instruments like pens and pencil points can change any or all of these settings. Temperature °F....

Owner's Manual - Page 12

To change your system type: ❑ Press until display shows your furnace or boiler type. ❑ Press Time to move to next feature or Run Program to return to main display. NOTE...; Press once. ❑ Press Time to move to next feature or Run Program to return to main display. Smart Response™ Technology (Feature Number 13) Smart Response technology options are : - 0 = 12...

Owner's Manual - Page 13

... ❑ Press Day until you press a key. ❑ Press . Factory Set Function (Feature Number 37) Do not change time format: ❑ Press once. ❑ Press Run Program to return to main display. STEP 9. until screen shows current time. (Tapping the Set Current Day/Time will advance the time in one ❑ Press Daylight Time...

Owner's Manual - Page 14

... four program periods: Wake -The program period when you are near the display. The thermostat displays day, time, program period, temperature and system settings. Sleep -The program... Pressing displays the current temperature settings. There is an individual key for activities before bedtime. (This is located behind the thermostat cover. STEP 10. Pressing the and keys change the ...

Owner's Manual - Page 15

... day. ❑ Press and release Wake . ❑ Press Day until the desired day displays. (Mon, Tue, Wed, Thu, Fri, Sat, Sun) ❑ Press time or until the desired time shows in parentheses ( ). The thermostat default settings are shown in the display. 15 69-1642 Table 3. Monday Tuesday Wednesday Thursday Friday Period Default Setting (Mon...

Owner's Manual - Page 16

Copy a Day Your thermostat can copy that day to any other day using procedure in Copy a Day. ❑ Press Run ...the First Day for the rest of the week. The setpoint temperature range is now programmed. ❑ Repeat each program period. The display shows. NOTE: After the first day is programmed, you can copy program settings from one day to another. ❑ Press Wake , ...

Owner's Manual - Page 17

... NOTE: Wake cannot be cleared. ❑ Press Run Program . STEP 11. OPERATING YOUR THERMOSTAT Change Temperature Setting Until the Next Program Period (Temporary Change) ❑ Press or until the display shows the day you want to copy. Temporary appears in the display. The setting cancels when the next program period starts or when you want to...

Owner's Manual - Page 18

... Return or Sleep to select the program period when you to your setting if desired. (The display changes from showing the setpoint temperature to room temperature after approximately three seconds). ❑ To cancel "Hold" press Run Program . Change the Temperature Setting Until a Designated Day and Period (Vacation Hold) ❑ Press Hold Temp twice. ❑...

Owner's Manual - Page 19

...thermostat controls your air conditioning system. Off: Both the heating and air conditioning systems are off. SET THE FAN AND SYSTEM SWITCHES First set the system switch. The equipment controls the fan operation. Then set the fan switch. Usage Key ❑ Press Usage once to display... ❑ Press Usage a third time to display the system operating time since the last time ...

Owner's Manual - Page 20

...to 99°F (7°C to 37°C). Display flashes during programming. Temperature change • Make sure the temperature setpoints are ... are installed correctly. • Make sure the thermostat is coming from the registers. Heating does not come...99°F (7 to Heat. Display does not appear. • Make sure the batteries are correct. 3. The cooling ...

Owner's Manual - Page 21

...; Your CT3600/CT3697 Thermostat learns from experience. Each day it checks how closely it hit the recovery target and then adjusts the next day's recovery start time accordingly. • It takes a few days after installation for the thermostat to adjust to the thermostat. When the thermostat activates Smart Response technology, the thermostat displays In Recovery, changes the setpoint...

Owner's Manual - Page 24

... you purchased it, or (ii) package it is defective or malfunctions, Honeywell shall repair or replace it , postage prepaid, to the following address: Honeywell USA Honeywell Canada: Dock 4 - This...THIS PRODUCT. Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be to repair or replace the product within a reasonable period of time. HONEYWELL SHALL NOT ...