What type of thermostat will replace a 8 wire Trane -model#BAYSTAT239A thermostat. I have aux. heat and emerg. Heat. Which of the below are heat/cool signals, heat/cool supply, aux heat/ emerg. Heat; fan signal?
g -
o -
x2 -
y -
t -
r -
w -
b -

I think your question would be better answerd on a hvac blog board!