Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Thermostat back light problem.

I'm having the same issue. Please let me know if you find out how to turn it off. Ours is like a beacon in the night. My husband has been placing a baseball cap over it until we can figure it out.
Thanks.
Kristi
Rowley1@cox.net

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  • rowley1 Oct 19, 2008

    Thank you soooooooo much, Jay! What an easy fix!

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You need the installation manual which can be downloaded at
http://yourhome.honeywell.com/Consumer/Cultures/en-US/Products/Thermostats

go to setting 280 which sets the backlight options and select option 0 which turns on the backlight for 8 seconds when a button is pushed and then turns off.

This info is not in the owners manual, only the installation manual.

Posted on Oct 16, 2008

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