Quote Originally Posted by Venom
I had a similar situation, car ran fine but no hot air. Was convinved there was no air in the system, bled it again and bingo. You could also take the valve off and check for blockages etc. I don't think the its the final resistor because from reading a post recently you would have no air blowing at all.
It blows but wont blow hot air for some reason. I will bleed it again and see might replace the rad also as its only in average shape.

Im convinced there is some valve somewhere sticking but sure ill give that a go first