Want4onlyone - http://www.hvacmechanic.com/ Forums
Original message
| Houston204
|  "Want4onlyone"
, posted Sat 18 Oct 11:43  
The Autochangeover function is only available with the RTH7500.
Rheem and Ruud will usually use a blue wire at the O/B terminal. Option 190 = 1 as you have posted.
"Tip of the Day" Remember to remove power first.
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