I have a HoneyWell Th8320U1008 tstat installed and I'm trying to add an outside sensor to it. When I step thru the codes I go from 330 to 500 skipping all codes in between. The outdoor sensor is hooked up but I don't see it on the display. I think 340 or 342 may be the codes for additional temp sensors. Does anyone have an idea of what is going on??
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