Why won't the light on my Honeywell thermostat come on

probably tripped a limit switch or a low voltage fuse would kill your display on the tstat, you should have battery power on your stat though.unless you have knowlege of electrical you better call a technician

DON'T BUY A NEW ONE JUST YET! IF THE BATTERIES DIED & THERMOSTA LOST POWER, IT MAY HAVE LOST IT'S MEMORY. IT MOST LIKELY WENT BACK TO FACTORY DEFAULT SETTINGS, & NEEDS TO BE RE-PROGRAMMED THROUGH THE INSTALLER SET-UP MENU. HOPEFULLY YOU HAVE THE PAPERWORK FOR THE THERMOSTAT STILL & CAN POSSIBLY DO THE SET-UP YOURSELF. IT SHOULD HAVE STEP BY STEP INSTRUCTIONS FOR THIS IN THE INSTALLATION GUIDE (NOT THE OWNERS MANUAL)

hello, when i turn the heat on , i suppose to hear a click but i dont and the heat is not coming on, what my solution.....

Honeywell manuals are online for all its thermostats.
Google search your model number.
Model number is on back of thermostat.
Copy following link for Honeywell resources:
http://yourhome.honeywell.com/home/Applications/FindYourModelNumber.aspx
Honeywell manuals are detailed, but each pdf file can be word-searched.
More resources:
http://www.ehow.com/how_6596826_troubleshoot-honeywell-thermostats.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

check your transformer some of them have a little reset button on the side if it arched it could of tripped it.if there is no reset make sure you have 24v coming into thermostat.

did you check power to the gas valve? Pilot lit? Or electronic pilot on? Need more info on boiler.

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.

AO Smith uses the Honeywell ICON gas valve with green indicator light.
Some models use White Rodgers Intellivent with a row of indicator lights.

The gas control blinks the error code:
Open following links to identify gas control thermostat and read possible error codes:
http://waterheatertimer.org/pdf/Honeywell-Gas-Valve-LED-Codes-2000.pdf
http://waterheatertimer.org/BW.html#Temp
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#intelli

Hi,

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

Manual Honeywell How to Find Honeywell Manuals

heatman101

Hello,

This is to tell you that the new installed honeywell thermostat as high voltage capacity, it is ok, it is not good enough, though, it as no much effect on your lighting points, but you can get a technician to see if there is a way to adjust the voltage at the thermostat.

Take care.