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Its a Trane XR 90 gas furnace/heatpump model #TXC050C4HPD0.
I did not replace the t-stat, I replaced the batteries for the LED screen.
Therefore, I only had to detach the faceplate. No wires were necessary to disconnect/reconnect.
Well, currently 0170 is set at 12 and 0190 is set at 1. However, on setting 0170 I have tried options 1,2,6,7,9. None of them seems to work.
Ok lets try 0170 on 7 *Multistage (2 heat / 1 cool)heat pump with aux heat And 0190 on 0 .Your unit changes over in cool mode
Success! Thanks. Do you think I had 0190 set at 1 while 0170 was at 7? Does that control the reversing valve or something?
Also, will that setting allow the gas furnace to kick on after the temp drops in winter?
and how do I set the temp control for when it switches over from heatpump?
Finally, while you have the settings manual in hand, are their any other recommendations for other settings,
Thanks for your help TIm.