AC didn't work in the summer and I ended up moving wires around to get it working. Now if I turn on the humidifier it seems to over ride the programmable thermostat and keep heating the house beyond the set point.

There are two wires entering the furnace (red and white) from the humidifier as well as wires from AC and thermostat. I had the two wires from the humidifier hooked up to the R and W terminals, but that does not seem to be correct because as I mentioned earlier the furnace continues to run when it shouldn't.

The terminals that are available are
C
G
Y
W
R

TIA,

Ted

Finally got around to calling my buddy the furnace guy. The answer is the Common and W.
C & W. Humidifier is now working fine.