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Question posted by Wtschenck on December 18th, 2014

My Mom's Thermostat Has Started Displying In Celcius Rather Than Fahrenheit. Fix

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Answer #1: Posted by TommyKervz on December 19th, 2014 1:35 AM

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TommyKervz

Member since:
January 10th, 2013

Points: 17,776,823

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Follow the instructions below

http://www.ehow.com/how_6670446_change-honeywell-thermostat-f.html

To download your owners manual click here

Hope that is helpful.
Kervz at www.satechhelp.co.za

Related Honeywell CT3355A1003 Manual Pages

Owner's Manual - Page 1

MagicStat®/3355 Programmable Thermostat by Honeywell OWNER'S GUIDE Weekday/Weekend (5-day/ 2-day) Programmable Heat and/or Cool Low Voltage (20 to 30 Vac) Thermostat and Mounting Plate Model CT3355 1 6699--11001122

Owner's Manual - Page 2

... a.m.-5:30 p.m., Central time. Contact your local waste management authority for instructions regarding recycling and the proper disposal of a mercury switch in the trash. RECYCLING THERMOSTAT If this thermostat is replacing a thermostat that contains mercury in a sealed tube, see Fig. 1, do not place your home, keeping you have questions, call Honeywell Inc. Your new...

Owner's Manual - Page 3

... Fan Operation Switch, as Required 18 Step 6: Adjust System On-Time, °F/C°, as Required 18 Step 7: Mount Thermostat Mounting Plate 21 Step 8: Wire Thermostat Terminals 23 Step 9: Mount Thermostat ...27 Step 10: Check Thermostat Operation After Programming and Installing 28 Step 11: Set Fan and System Switches 30 Troubleshooting Guide ...32 Limited One...

Owner's Manual - Page 4

...-1012 a Compatible with 2-wire Honeywell Zone Valves. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. Table 1. Isolating relay required for 3-wire thermostats for Installation s Check Table 1 to the retailer. Compatibility Chart. If not, return to make sure this...

Owner's Manual - Page 5

... WALL WIRE CUTTER/STRIPPER OR SHARP KNIFE, IF NEEDED TO STRIP WIRES MASKING TAPE, IF NEEDED TO LABEL WIRES AS DISCONNECTED FROM OLD THERMOSTAT LEVEL, IF NEEDED TO LEVEL THERMOSTAT FOR APPEARANCE 5 M878B 69-1012 Also purchase two AA alkaline batteries; we recommend Energizer® batteries. s Acquire tools and items below as...

Owner's Manual - Page 6

... they do not operate the cooling system when outdoor temperature is not connected to your old thermostat, you disconnect each wire, use masking tape to keep them from the bottom, check for... a screw used to lock on the cover. If either does not work, contact your new thermostat and mounting plate; s Carefully unpack your local heating/air conditioning dealer. If there are working properly...

Owner's Manual - Page 7

...do not interfere with such systems so return the product to terminals), you have three thermostat wires. Disconnect the wires and wrap them together. Record the colors and terminal designation labels... of a heat pump or multistage system. If you may damage your transformer. The thermostat does not work with your system, call Honeywell Customer Assistance at 1-800-468-1502....

Owner's Manual - Page 8

...Replace the batteries as soon as long, and can leak, causing damage to the thermostat or the wall surface. We recommend Energizer® batteries. s Install the fresh ...Lo indicator flashes for programming and operation of the thermostat and heating/cooling system. If you do not last as possible after the indicator starts flashing. M1719C REMOVING BATTERY DOOR As the batteries are...

Owner's Manual - Page 9

... down due to remove. IMPORTANT Although the thermostat has a low battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down on without flashing, indicating the thermostat and heating/cooling system have to reprogram. indicator... on the left ends of battery power. See pages 14 and 15 to reprogram the thermostat.

Owner's Manual - Page 10

...can set for your furnace response time, to give the furnace a head start to program the thermostat after it is the time period you get up and RETURN is installed ...during heating season, or a higher temperature during cooling season.) Four time periods are installed, the thermostat can be a higher temperature during heating season, or a lower temperature during cooling season.) LEAVE ...

Owner's Manual - Page 11

...and temperature program for all weekend. For example, a house that is entered for the weekends, the thermostat will probably be different for weekdays and weekends. Also, during the night.) You will set for ... program all periods if your finger or a soft pencil eraser. to give the furnace a head start to heat the house before you arrive home. (Again, this is higher heating or lower for...

Owner's Manual - Page 12

Personal Programming Chart Weekdays WAKE 1 LEAVE RETURN 1 SLEEP Heating Program Start Time Weekends WAKE 1 SLEEP 2 Heating Temperature 1 WAKE and RETURN start times should include extra lead time based on outside temperature and furnace response time, to give your furnace a head start to heat the house. 2 The temperatures cannot be set any higher than 88...

Owner's Manual - Page 13

... should include extra lead time based on outside temperature and furnace response time, to give your furnace a head start to program the thermostat, it automatically controls heating at 68°F (20°C), and cooling at 78°F (26°C), 24 hours a day. 13 69-1012 NOTE: If you ...

Owner's Manual - Page 14

... until M1699A current day shows; WAKE, Mon-Fri and SET appear on pages 8 and 9. Remove the battery door (on the thermostat left side) using a coin at HEAT, press and release Weekday Schedule once. This guide can be used for operation and programming....M1699A Heating Program With system switch at the bottom. NOTE: Batteries are required for programming your new thermostat. to OFF.

Owner's Manual - Page 15

... Temp Time Ahead Back to program Warmer M1699A WAKE time and to program WAKE temperature for the Heating Program. Press and release Run Program to start the program. 15 69-1012 Press Weekend Schedule until SAT SUN, WAKE and SET appear on the display.

Owner's Manual - Page 17

... Program section or Cooling Program section (pages 14 through 16), as applicable. then press Program . press Weekday Schedule , Weekend Schedule repeatedly to normal program or start program - Check Usage - then press Run Program .

Owner's Manual - Page 19

... set to read the temperature in ). NOTE: This thermostat does not have a setting for accurate temperature control. IMPORTANT When using a high ...turn , B-leave in). • Electric Furnace-Leave at the Warm Air Furnace setting (A-leave in, B-leave in degrees Fahrenheit. Cycles would not be long enough for steam/gravity air. If readings are desired in degrees Celsius, adjust screw C out ...

Owner's Manual - Page 28

...key until the setting is about 10°F (6°C) below room temperature. This damages the thermostat, instead, jumper R and W wires at the primary control such as the gas valve,...check heating system operation by jumpering thermostat terminals at the thermostat. Heating should start and the fan should shut off. 28 69-1012 Step 10: Check Thermostat Operation after a short delay (...

Owner's Manual - Page 29

...at AUTO. Press key until setting is below room temperature. The cooling equipment and fan should start. The system and fan should be off. 69-1012 This delay protects the compressor. NOTE...;F (6°C) below 50°F (10°C). Press key until the setting is changed, thermostat may delay up to five minutes before turning on the air conditioner. Cooling To avoid possible ...

Owner's Manual - Page 33

... temperature, and the display shows HEAT, contact Honeywell Customer Assistance at 1-800-468-1502. s The thermostat has a built-in time delay on the thermostat is set to ten minutes after changing the setting before the air conditioner starts. If heat does not come on. s If temperature setting is blank or shows bAt Lo...