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Old 11-21-2018, 07:17 PM   #1
Senior Member
Join Date: Jan 2012
Posts: 591
DuoTherm 5 button thermostat

I have a problem with a 2006 Duo Therm 5 button thermostat. It was set to heat today and the AC unit attempted to engage intermittently will the furnace was on. When I checked the AC temperature setting, it was at 0. I turned the thermostat off and on and got the EE error. I reset it per instructions but still got the EE error. I checked both ends of the comunication wire and they looked fine. All fuses are good. Any ideas? Thanks.

merrykalia is offline   Reply With Quote
Old 11-22-2018, 07:03 AM   #2
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Join Date: Mar 2008
Location: Southwest Alabama
Posts: 7,683
Error EE is a communication error, but having said that, the error could be the stat, control board, or the cable. You can try removing power for a few minutes and then resetting the stat again.

Also, make sure that your battery is fully charged, because they will give that code sometimes on low voltage.
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