Question about Honeywell Rth8500d 7-day Touchscreen Programmable Thermostat

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Screen on honeywell rth8500d thermostat will not come on

I changed batteries but still can not get the screen to light up on thermostat.

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: I changed the batteries of

Hello my name is Heath it will be my pleasure to assist you. Take the new batteries out and let the display go completely blank then reinstall the new batteries and the lo batt light should go off.

Posted on Nov 08, 2010

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  • 49 Answers

SOURCE: My Honywell Thermostat screen is

disconnect the power wait a few minutes and reconnect, this should reset the electronics

Posted on Feb 24, 2011

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