Question about Honeywell CT3600 7 Day Electronic Programmable Thermostat Heater

1 Answer

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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  • Anonymous Mar 29, 2008

    Mine's showing the same message after running for a day or so with fresh batteries. Replacing the new batteries with different ones hasn't helped the situation. The only thing I can get to run is the fan; no heat, no AC, no programming capacity.

    It's 34 degrees outside, so I'm eager to get this problem solved!

    There must be a manual on the www somewhere...will start digging before my fingers freeze!

  • JIM PED Jul 08, 2008



  • Anonymous Sep 27, 2008

    Notice EEE on thermostat

    Fresh Batteries but no change



1 Answer

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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