Yes, thank you all for the assistance. I added a few pics, perhaps these are easier to read.
What I'd like to do is, wire all three off of the one thermostat and also have a manual option. Ex. A toggle switch with Auto-Off-manual.
Can the wires to the OEM fan and T-stat all be accessed at bottom? It appears I need to access the wire (part 3) from the thermal fuse (part U) to fan, but I believe that wire is near top of refer making access difficult. It would make wiring all this much easier if I could access at bottom of refer.
If not able to access those wires, I would then need to determine "where" to the mount t-stat sensor wire (it is not thermal fuse as is OEM) from new two fans? Fans would be mounted pulling fresh in from lower vent and pushing air UP towards roof vent. Is the T-stat wire taped to lower absorber tubes, to absorber vessel, or ?
Thanks
