"The King
" brought up a good point. If when the cars running, the heater inlet hose is hot, odds are the hot water is getting to the core, and then getting stopped. If the core is new, then more than likely its not the problem.Thus doors/flaps should be further investigated.
Just my .02,
J
__________________
____________
'66 Mustang Coupe- AKA "Lenore" *on disability for a (long) bit*
'93 GT Mostly stock AKA "Fawkes"
Rice Haters Club Member #239
"I find your lack of faith...disturbing."
"Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats." H. L. Mencken