Another Truesteam wiring question, appreciate any help on this issue. I have a Carrier furnace model #58mxa100-16 series 111 approximately 15 years old that was recently updated to a hybrid system with a Carrier outdoor unit and coil, model #25hpa5 along with a Carrier Thermidistat. I am using the Carrier Thermidistat instead of the manual humidistat included with the Truesteam. The Thermidistat has two separate connectors. The connection at the bottom of the unit is as follows: S2-Brown wire, S1-Black wire, B-not used, HUM-not used, DHUM-not used, C-blue wire. The connections at the top right of the Themidistat are: W/W1-White wire, Y/Y2-Yellow wire, G-Green wire, R-Red wire, Y1/W2-not used, O/W2-Orange wire. The furnace board connections are: HUM-not used, COM-2 Blue wires, W-2 White wires, Y-2 Yellow wires, R-2 Red wires, G-1 Green wire. There are also three leads, Orange, Brown and Black wiretied to matching color leads that must be for the thermidistats outdoor sensor. It seems as though I may have to run an extra wire to the Thermidistat as the current wire has only eight leads and all of them are used. I understand the basic wiring diagram provided in the Truesteam manual; G from Thermidistat to GT on Truesteam, GF from Truesteam to G on furnace board. What is a little confusing is the two terminals shown on the mechanical humidistat running directly to the two HUM terminals on the Truesteam. The Carrier Thermidistat has only one terminal marked HUM so I cannot figure out how to finish the wiring to complete the circuit without the fear of damaging one unit or the other. A little more information on this system, it does not have an air flow switch nor obviously an equipment interface module. I am also taking for granted that wiring the system as above will activate the humidifier only when there is a call for heat and not independently for humidification. Any help on wiring this humidifier would be appreciated. Thanks

I have a ~13 year old Lennox series G23 gas furnace/AC unit. I'm planning to install a whole house bypass humidifier (BestAir BA3200). I've drilled a hole in the supply duct, about 18" above the top of the furnace unit, but discovered that there is an obstruction about 2 inches inside the outer plenum. I can't tell what it is without creating a larger opening or dismantling the supply, and wasn't able to find much info on this online. I'm hoping someone with experience installing these furnaces, or humidifiers could shed some light on this before I do any further mutiliation of the plenum. Thanks in advance.