Honeywell CT3400 Support Question
Honeywell CT3400 Support Question
Find answers below for this question about Honeywell CT3400.Need a Honeywell CT3400 manual? We have 1 online manual for this item!
Question posted by tkhand on July 6th, 2015
Blank Screen But Fan On Works
I came upstairs to find the floor very warm and humid. I went to the thermostat and the screen was blank. I tested the batteries and they were good. I changed them anyway and the screen remains blank.
Current Answers
Answer #1: Posted by TommyKervz on July 7th, 2015 2:18 AM
TommyKervz
Member since:
January 10th, 2013 Points: 17,776,813
Member since:
January 10th, 2013 Points: 17,776,813
See possible reason for blank screen below
http://www.ehow.com/info_12137886_reasons-blank-screen-honeywell-thermostat.html
Related Honeywell CT3400 Manual Pages
Owner's Manual - Page 1
...%
28%
26%
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
4%
2% Minneapolis St. 69-0733-3
PROGRAMMING AND INSTALLATION INSTRUCTIONS
Honeywell/34
Model CT3400/CT3455
THERMOSTAT
Low Voltage (20 to 30 Vac)Thermostat and Wallplate
PROGRAMMABLE
Programmable Heat and/or Cool
Weekday/Saturday/Sunday
Approximate percentage of these savings). Rev. 4-97 ©Honeywell Inc. 1997...
Owner's Manual - Page 2
... find it 's your choice-use the preprogrammed schedule or set your local waste management authority for instructions regarding recycling and the proper disposal of this thermostat is replacing a control that will arise as you have the house at 1-800-468-1502.
TOTAL COMFORT TEMPERATURE MANAGEMENT WITH ADAPTIVE INTELLIGENT RECOVERY™
Congratulations...
Owner's Manual - Page 3
... Program ...6
Install the Batteries ...6 Adaptive Intelligent Recovery™ Selection 7 STEP 4 Program The Thermostat 9 STEP 5 Mount Thermostat Wallplate 16 STEP 6 Adjust System On-Time, Clock Display, as Required 18 STEP 7 Adjust Fan Operation Switch, as Required 20 STEP 8 Wire Wallplate Terminals 21 STEP 9 Mount The Thermostat 24 STEP 10 Check Thermostat Operation After Programming and...
Owner's Manual - Page 4
... APPEARANCE
M878B
3
69-0733-3
STEP 2 Remove Old Thermostat
s Test to make certain that go to lock on the Chronotherm® Thermostat wiring wallplate. s Turn off when pulled firmly from falling back into
the wall, as needed (below 50°F (10°C). If there are working properly. s Carefully unpack your local heating/air conditioning dealer...
Owner's Manual - Page 5
... system. See pages 13 through 15
to 2 months before batteries run out completely.
Six or more wires (excluding clock wires attached to terminals), you can operate the fan using electrical tape; The thermostat is blank, the batteries are included with the thermostat. Three thermostat wires? The thermostat will work without installing an isolating relay on
pages 11
and 12...
Owner's Manual - Page 6
... temperature. M2483
minder that you should program the start of battery power.
This thermostat is a good head start time to start time accordingly. NOTE: If you want the comfort temperature established. INDICATES THERMOSTAT IS SET FOR CONVENTIONAL RECOVERY
mostat display as the seasons change batteries before reaching your furnace or air conditioner comes on the back...
Owner's Manual - Page 7
... the batteries are installed, the thermostat can be easily programmed in your hand before bedtime. (Again, higher heat or lower cool.) NIGHT is the time period you can set for an energy-saving temperature while you are away at work or school. (This will probably be helpful when planning your program schedule of...
Owner's Manual - Page 9
Batteries...13
69-0733-3
COOLING PROGRAM The times you set for heating remain the same for cooling; For Saturday, press Day
a
to...move number ahead.
14
PROGRAMMING
69-0733-3 When programming your new thermostat, use
a
Time
and
Temp
to program Saturday morning time and...operation. use
Temp
a
to SAT. After programming, adjust fan and system switches as you only need to program the ...
Owner's Manual - Page 10
...
press Run . Program
Hold a temperature indefinitely (such as applicable. Hold Temp
on display, and cancels itself at next scheduled change.
a Press on
to move number ahead.
15
69-0733-3
STEP 5 Mount Thermostat Wallplate
s Position wallplate on to move number back; press on wall. Level the wallplate for current period only-
WALL
WIRES...
Owner's Manual - Page 11
...-Time, Clock Display, As Required
s The thermostat on -time, readjust screws 1A and/or 1B as a guide. Setting the screw out one turn means turning the screw approximately 360° counterclockwise, or about one turn).
• Gas/Oil Warm Air-Set at the Gas/ Oil Warm Air setting (1A-leave in, 1B- s Remove...
Owner's Manual - Page 12
...1B 2A 2B
SYSTEM
GRAVITY AIR/WATER
HOT WATER OR HIGH EFFICIENCY (90%+AFUE)
GAS/OIL WARM AIR
ELECTRIC WARM AIR
1A
OUT 1 TURN
1B
OUT 1 TURN
IN
OUT 1 TURN
IN
IN
(FACTORY ... Adjust Fan Operation Switch, As Required
s The thermostat fan operation switch is set in the left battery
4A
must be removed to turn . The ELEC position allows the fan to access the switch. s The thermostat is ...
Owner's Manual - Page 13
... Match the letter of your old thermostat wire with local codes and ordinances.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M612A
HEATING RELAY OR VALVE COIL
FAN RELAY
COOLING CONTACTOR COIL
1
1 ... AS REQUIRED. If unsure about household wiring procedures, call your new thermostat. Refer to re-
FOR STRAIGHT INSERTION- M2486
ing terminals R and Rc.
21
69-0733-3...
Owner's Manual - Page 14
...
AM
MON DAYTIME
HEAT ON
Set Present Day Time
Hold Temp
Day Morning
Run Program
Night
On Auto Fan
Daytime
Current Setting
Temp
Evening
Time
Heat On Cool
24
B. ENGAGE TABS BETWEEN TOP OF THERMOSTAT AND WALLPLATE
C.
PRESS LOWER EDGE OF CASE TO LATCH
M5143
69-0733-3
INSTALLATION PROVIDE DISCONNECT MEANS
AND...
Owner's Manual - Page 15
... is below room tempera- The cooling equipment and fan
should run after a short delay (immediately if fan operation switch is set in ELEC position).
25
69-0733-3
Temp
COOLING
To avoid possible compressor damage,
do not operate the cooling system when outside temperature is changed, thermostat may delay up arrow of key until the...
Owner's Manual - Page 16
... switch on automatically with furnace only. The fan should run continuously. A single-speed fan turns on back of thermostat is set the fan switch. FAN
ON AUTO
FAN
ON AUTO
28
69-0733-3 When the fan switch is in the AUTO position, fan cycles with the furnace. A twospeed fan usually runs on high with the air conditioner and on...
Owner's Manual - Page 17
... the current day and time are correct.
HEAT: The thermostat controls your programmed comfort periods.
30
69-0733-3 Replace batteries correctly. Display flashes during programming. Be sure that AM and...if necessary. s Set the system switch to 31°C).
Temperature change occurs at least five seconds to reset thermostat.
HEAT OFF COOL
OFF: Both the heating and air conditioning ...
Owner's Manual - Page 18
...and good connections.
31
69-0733-3
The house is blank or displays REPL BAT, install fresh batteries.
...thermostat is installed.
See page 15.
32
69-0733-3 Heating does not come on. If cooling does not come on after changing...thermostat is displayed, contact Honeywell Customer Assistance at 1-800-468-1502.
If display is too warm or too cool. s Check for correct wiring and good...
Owner's Manual - Page 19
... on most gas and oil systems, the fan is not controlled by another control, which ...thermostat, but no heat is coming from adversely affecting the
display. The system cycle length is factory-calibrated and cannot be adjusted.
33
69-0733-3
Index
Adaptive Intelligent Recovery 7,8
Batteries, installation 6 Batteries, replacement ........ 6,7 Blinking display 6 Canceling programs 15 Change...
Owner's Manual - Page 20
... or consequential damages, so this product, excluding battery, to be to repair or replace the product...following information available-thermostat model number and date code, type of heating/cooling system (e.g., hot water, warm air, oil... retailer from defects in Canada: Honeywell Limited/Honeywell Limitee
Return Goods Department
Product Services ON30
1050 Berkshire Lane
155 Gordon Baker Road...
Similar Questions
Thermostat Will Not Trigger Heat After Replacing Batteries
My thermostat batteries died while away. I replaced them and it appears to be working but no matter ...
My thermostat batteries died while away. I replaced them and it appears to be working but no matter ...
(Posted by rfeldman5 7 years ago)
Thermostat Needed Battery, Replaced, Does Not Work
replaced batteries, will no let us program it
replaced batteries, will no let us program it
(Posted by dsilkworth 9 years ago)
Problem With Ct3400 Thermostat
My ct3400 thermostat said to replace batteries, however changing the batteries, it still says "repla...
My ct3400 thermostat said to replace batteries, however changing the batteries, it still says "repla...
(Posted by parrissenior 9 years ago)
My Honeywell Ac Thermostat Ran Out Of Batteries. I Changed Them
itNeither wont restart. Any suggestions?
itNeither wont restart. Any suggestions?
(Posted by Richardbrace 10 years ago)