Looking for help, I have 2015 RR autobiography, I have no heat at all coming from the blowers. The engine temp is spot on, there is hot coolant going through the hose to the heater cool coming back on the return. I have disconnected and tried flushing and back flushing, the coolant level is constant so no leaking, I have tried bleeding several times and yet it makes no difference at all. To throw a curveball, the auxiliary heater warms the car fine and I am assuming that's the same heater core so can't be blocked? it is like there is something mechanical stopping the heat coming through?
Any Ideas?