Thinking to build a home made temperature control for the "home AC".
Any hint where I can find some description of the wiring coming to the
actual thermostate box?

It seems to be the most common type of controls, COOL-OFF-HEAT  AUTO-FAN-ON
and the temperature lever that changes the thermostate mercury switches.
Coming 9 wires from the cable, 8 used.  There is a name "TRANE" printed on
front panel.

I guess we may have power in some wire that can be regulated to feed some
uC.
Small relays and temp sensors could be a good job in saving energy during
the non-necessary time of the day, including remote programming via phone
DTMF (on/off, set temp, etc).

I also noticed that there is a variable resistor inside, probably to set up
the auto-fan timer.

Any hint will be appreciated.
VV46NER.

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