hello
I am getting poor heat out of my z28 even when the engine is warm after driving a while and i stop and temp rises to 210 it only has almost hot heat and when driving with temp at 190-195 its mearly luke warm. whats weird is one day i noticed the heat was extremly warm so good it was melting the snow off the top of the car then next day it was back to crummy. A while ago if i recall correct i had great heat for 3 or 4 days then it was back to crummy

thanks