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Question posted by rfeldman5 on December 10th, 2016

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 how high I push the temperature the burner is not pushing out warm air, only cool. I switched it out with another 3400 in the house and that works fine. I keep the thermostats on hold Temp all the time an adjust manually as needed. Do I need to reprogram the thermostat after installing new batteries in order for it to work properly

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Answer #1: Posted by BusterDoogen on December 10th, 2016 5:32 PM

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If you don't insert new batteries within 20 to 30 seconds of removing the old ones, you will have to reprogram the thermostat.

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Related Honeywell CT3400 Manual Pages

Owner's Manual - Page 1

... Denver Des Moines Omaha Salt Lake City Boston Chicago Detroit Pittsburgh Indianapolis Cincinnati Kansas City 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).

Owner's Manual - Page 2

...the desired comfort temperature by remembering to automatically adjust the heat or air conditioning when you leave home or go on to spend a few minutes reading this thermostat is replacing a control ... purchased your old control in a thermostat. Recycling Thermostat M3375 If this manual. It comes already programmed, so it answers many of a mercury switch in the trash. You made a...

Owner's Manual - Page 3

... STEP 1 Prepare For Installation ...2 STEP 2 Remove Old Thermostat 4 STEP 3 Before You 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...

Owner's Manual - Page 4

... wire, use masking tape to subbase, wallplate or wall, and lift away. Do 4 69-0733-3 s Carefully unpack your local heating/air conditioning dealer. If there are replacing a Honeywell Chronotherm® Thermostat, you are only two wires, they do not operate the cooling system when outdoor temperature is below ). CROSS-RECESSED SCREWDRIVER HAND OR POWER DRILL WITH 3/16...

Owner's Manual - Page 5

..., as shown in back of a heat pump or multistage system. Replace the batteries as soon as shown, making sure positive (+) terminals all face toward the right. onds of removing the old ones, you will work with such systems so return the product to the place of the thermostat and heating/cooling system. Record the colors and terminal...

Owner's Manual - Page 6

... screw 3A (on to turn . IMPORTANT: Although the thermostat has a low battery indicator, replace the batteries once a year to prevent leakage and to prevent the thermostat and heating/cooling system from shutting down due to lack of the time your furnace or air conditioner, it considers: (1) air temperature, (2) the temperature of the thermostat) by turning out one turn on and off several...

Owner's Manual - Page 7

... house at a comfortable temperature for activities before it is installed on the wall. Fill in parentheses. Before programming, remove the clear plastic overlay covering the display. STEP 4 Program The Thermostat After the batteries are installed, the thermostat can be easily programmed in your hand before bedtime. (Again, higher heat or lower cool.) NIGHT is installed...

Owner's Manual - Page 8

... _(_6_0_°_F_[_1_6_°_C Saturday Program START TIME (_6_:_0_0_A__M (_1_0_:_0_0_P_M HEATING 1 TEMPERATURE _(_7_0_°_F_[_2_1_°_C _(_6_0_°_F_[_1_6_°_C 11 COOLING 1 TEMPERATURE (78°F [26°C]) _(7_8__°F__[_2_6_°C COOLING 1 TEMPERATURE _(7_8_°_F__[_2_6_°C _(7_8_°_F__[_2_6_°C 69-0733-3 PERIOD MORNING...

Owner's Manual - Page 9

... Saturday, press Day program to SUN. After programming, adjust fan and system switches as you did for SAT. 13 69-0733-3 COOLING PROGRAM The times you set for heating remain the same for cooling; When programming your new thermostat, use Temp a to Saturday morning temperature. For Sunday, press Day to SAT. Use a Temp to program Saturday...

Owner's Manual - Page 10

...Program Hold a temperature indefinitely (such as applicable. Run Program . press on to move number ahead. 15 69-0733-3 STEP 5 Mount Thermostat Wallplate s Position...application. Program a , Temp Hold appears Current Check current temperature setting- Permanently Change a program-Repeat steps under Heating Program (page 13) or Cooling Program (page 14), as on ...

Owner's Manual - Page 11

s Level for a warm air, gas or oil heating system. Tighten mounting screws. The system on the back of system to minimize room temperature swings. Loosely insert two mounting screws into drilled holes until flush with the type of the thermostat, using the heating system table in the illustration as follows: 18 69-0733-3 INSTALLATION Setting the screw...

Owner's Manual - Page 12

... temperature in the left battery 4A must be removed to the right (ELEC) position. s For an explanation of the Recovery Selection screws (3A), see pages 7 and 8. 19 BACK OF THERMOSTAT RECOVERY SELECTION 3A ADAPTIVE IN INTELLIGENT TM (FACTORY SETTING) CONVENTIONAL OUT 1 TURN 3A 1A 1B 2A 2B SYSTEM GRAVITY AIR/WATER HOT WATER OR HIGH...

Owner's Manual - Page 13

...thermostat. M2486 ing terminals R and Rc. 21 69-0733-3 2-WIRE HEAT-ONLY (JUMPER INTACT) W G R RC Y THERMOSTAT 4-WIRE HEAT/COOL (JUMPER INTACT) W G R RC Y THERMOSTAT HEATING...to help prevent drafts from adversely affecting thermostat operation. M614A 22 69-0733-3 INSTALLATION...on wires when you placed on your new thermostat. STRIP 5/16 IN. (8MM) FOR WRAPAROUND- ...

Owner's Manual - Page 14

...Run Program Night On Auto Fan Daytime Current Setting Temp Evening Time Heat On Cool 24 B. 3-WIRE HEAT ONLY (JUMPER INTACT) W G R RC Y THERMOSTAT 5-WIRE HEAT/COOL (JUMPER REMOVED) W G R RC Y THERMOSTAT HEATING RELAY OR VALVE COIL FAN RELAY 1 1 POWER SUPPLY. M613A HEATING RELAY OR VALVE COIL FAN RELAY COOLING CONTACTOR COIL 1 1 POWER SUPPLY. PRESS LOWER EDGE OF CASE TO LATCH...

Owner's Manual - Page 15

... switch to HEAT and the fan switch to five minutes before turning on the air conditioner. Press up arrow of key until the setting is about 10°F (6°C ) below room temperature. stead, you could jumper R and W wires at the primary control, such as the gas valve, zone valve, oil burner control. Move the system switch to COOL...

Owner's Manual - Page 16

HEAT OFF COOL FAN ON AUTO Move the system switch to OFF and the fan switch to the thermostat.) FAN AUTO: Normal setting for most homes. Use for improved air circulation during special occasions or for more efficient electronic air cleaning. (In a heat-only system, fan runs continuously only if fan relay is in the AUTO position, fan cycles...

Owner's Manual - Page 17

.... HEAT: The thermostat controls your air conditioning system. Replace batteries correctly. s Gently clean battery contacts...HEAT OFF COOL COOL: The thermostat controls your heating system. s Make sure batteries are off. Temperature change occurs at least five seconds to reset thermostat. Reprogram if necessary. s If you left the thermostat set the system switch. s Set the system switch...

Owner's Manual - Page 18

... heat does not come on, contact your air conditioner does not come on cooling. s Jumper wires Rc and Y. s The thermostat has a built-in time delay on , contact your compressor may have reached its high limit temperature protection and shut down. s If temperature setting is lower than current temperature, and HEAT ON is blank or displays REPL BAT, install fresh batteries...

Owner's Manual - Page 19

... Replacing batteries 6,7 Saturday program ......... 10,11,12,13,14 Set cooling temperatures ..... 14 Set present day 13 Set present time 13 Set fan switch 28 Set cooling temperatures ..... 14 Set heating temperatures ... behind the thermostat is plugged with insulation to help prevent drafts from the registers. HEAT ON is displayed, but by the thermostat, but no heat is coming ...

Owner's Manual - Page 20

... apply if it , postage prepaid, to the following information available-thermostat model number and date code, type of heating/cooling system (e.g., hot water, warm air, oil, gas, etc.), and number of time. If, at any questions concerning this product, excluding battery, to be to repair or replace the product within a reasonable period of wires connected to the...