Heater stuck on - controls intermittently works

My heater is always stuck on and I'm wondering I find it's the blend door actuator or blend door itself. It will reset on occasion and the AC works but it always ends up going back over to heat only eventually.

Controller is 90%of the time off with nothing displayed. As soon as it fails the heater comes on and display goes blank.
I have tried the three finger reset and it works but does not last for moreover than 5 min before heat is blairing again and controller shuts down..

Should be able to remove from behind the glovebox if my research is right..
Also the passenger side floorboards are filling with water from the evap unit... is a drain possibly clogged...?

Thanks a bundle!
Heated driver ;)