Question about Honeywell CT3600 7 Day Electronic Programmable Thermostat Heater

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EEE error message

I just replaced the batteries on my Honeywell CT3600 thermostat, and when I popped the face back on the wall, an "EEE" error message is all that appears on the display.  Anyone know what I can do?

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Re: EEE error message

I just talked to Honeywell support - they claim that an eee error means there has been a "unique error" and that the unit will need to be replaced - cannot be fixed. They were pretty good about giving a suggestion for a new thermostat and wiring directions if you want to DIY. Otherwise, call a pro.

Posted on Oct 11, 2008

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