20 Most Recent Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater - Page 9 Questions & Answers

Go to Advance Functions Page 23 of your manual.You have to turn Option 0160 to "on" or "4"1) Press System2)Press and Hold blank center key until the display changes.3) Change settings as required (Cursor to option 0160, then hit other cursor to change from 0 to 4)4)Press Done to exit and save changes

Inside the thermostat (behind) are 3 tiny DIP switches.Switch #3 should be set to OFF or click it to the left to display *F.You can use a tiny scerwdriver

Hi,
On the new thermostat put the red wire under the Rh terminal and the white wire under the W terminal. If you heat does not work then it is because something else is wrong, not the wiring...

heatman101

It probably has stopped outdoor unit and the blinking is to be done when working anamoni.afto heating and not to bring in cold air flashes the LIGHT as long heated air into the condenser.

how to un hold a thermostat

There is no cost for these questions unless you require immediate assistance with an expert, at which time it will prompt you. Hope this helps

Try replacing the 9 volt battery in the thermostat. Clean the terminal with a #2 pencil eraser to get rid of any corrostion.

If that isn't the problem, then something in your thermostat is getting ready to fail and pulling more power which makes the light dim. Unfortunately, the boards are not usually locally avaiable and will need to be ordered, so you might want to consider replacement versus repair.

the flashing snowflake is it telling you its in % min delay if it doesnt stop flashing within 5min it may be a bad tstat. if it goes solid and the unit is still not working its probably not the stat

Hi,
The blue to the "C" terminal... but it would probably work without it hooked up.

heatman101

I recommend you go to Honeywell site and type in your thermostat model etc. It will give you step by step procedures and may provide the answers you are seeking.

Hi, Either push the program or resume program button... or on some you need to push the hold button again to take the hold off... Check the manual if all of this does not work... but the t-stat may be fried...

Here is a tip that tells you how to get a manual for most any Honeywell productonline...

Manual Honeywell How to Find Honeywell Manuals

heatman101

go to Honeywell web sit with correct and full m# look for instruction man

You are on the right track, you can hook the same 4 wires to the new thermostat without the jumper you had on the old thermostat. The jumper wire that is on the new thermostat can stay with no problems. Just connect the wires to the same terminals on the new one and your good to go!

R represents power supply for the heat system.
RC represents power supply for cooling system.
G represents fan (neutral).
W represents heat system.
Y represents cooling system.
Y2 represents 2nd stage cooling.
W2 represents 2nd stage heating.
AUX represents heat pump.
Try calling 1-800-468-1502.
Their english is "REALLY BAD"!!!