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

1 Answer

RTH2520 Thermostat backlight

Backlight on our thermostat stopped working. I think that everything else works fine. Is there anything that I could do my self to get it to work again? I got this unit at Costco in November 2008 and installed it my self.

Thanks!

John

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  • Anonymous Mar 29, 2014

    Doesn't work long

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  • 82 Answers

Some thermostats have batteries i have found that they sometimes have enough power to operate t-stat but not back light. usually AA batteries other than that it is more than likely a problem that can not be repaired

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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