Thermostat to Controller Wiring (furnace, basement, outside, better)

[BucsLose]

I went to replace my thermostat with a newer one, and have some questions. The wiring doesnt seem to match up.

First pic is the wiring to thermostat. White was wired to W. Yellow was wired to Y. Green was wired to G. C (common) had no wire. Blue was wired to R. Red was not connected when I took the panel off the wall. I think it may have gotten loose. So I put it on Rc which is jumpered to R.
I immediately wonder why the Blue wire is connected to R.



Now looking at the controller in the basement. The harness coming from the thermostat has the following connections. Blue goes to R. Green to G. Yellow to Y. The White and Red wires are not going to the controller, rather they go down into the blower/boiler. The Red and White wires that are connected to the controller seem to trace by to the A/C unit outside, though Im not 100 percent certain.





So my question is, is this wired correctly? Im confused on how to wire the new thermostat now because im a bit confused by looking at all this now. If this confuses anyone, I can try and explain more or even take better pictures.

Any help is appreciated.

[K'ledgeBldr]

What brand and model did you get for the replacement?

What is the brand and model number of the furnace and condensor unit?

With this info I'm sure someone here can layout a wiring diagram.