| Jay,
There is a heat pump connected with the furnace. The humidistat is a basic dial type Aprilaire (not digital) and has just 2 connection terminals when you remove the cover. I haven't used the humidifier for a few years and it used to work fine. No one has changed the wiring as far as I know, although I have had service people work on the furnace since the humidifier has worked. The terminal board inside the furnace has 2 rolls of terminals for a total of 10, and they are marked as follows: 1st row:G O W X Y 2nd row: 66 60 53 B R.
Sincerely
mross |