New Honeywell RTH8580WF Themostat - No auto cool/heat mode?
Asked Sep 7, 2012, 04:01 PM
Just today I received a new Honeywell WiFi thermostat. I was replacing a very similar Honeywell 8000 serious 7 day programmable thermostat. In fact short of the Wifi being a little bigger they are virtually identical.
The mounting plate as almost identical so I simply moved the existing wires from the old plate terminals to the new plate in the same positions. I verified they were in and tight.
After plugging in and setting up the new Wifi thermostat it only shows modes of "heat" and "cool". There is no auto as was present in the prior version. However the manual on the new Wifi thermostat claims it supports "Auto" but it will only show up depending upon how it was installed.
This leads me to believe either a wire is not well connected or perhaps this new thermostat needs something wired a little differently.
How do I go about figuring this out? We use the auto heat/cool mode a lot here in Colorado during the fall and spring months when the temp can swing 60 degrees.
Thanks in advance