Yeah, me too. But mine was only cold air and was also a problem with a blend flap motor.
OP, do you have dual zone climate? If so, can you get cold air out of left or right side vents? This may help you pinpoint the motor that needs replacing/fixing.
I replaced mine with a used part from a wreckers in the UK despite living in NZ. There is a youtube video showing how to clean them and test them using a multimeter if you want to go that route.
Decided to do the Mk6 climatronic upgrade while I was at it.