Help beside furnance !!!? I have central heating&air installed surrounded by my attic. I have the...

I have central heating&air installed surrounded by my attic. I have the HEAT switch turned to HEAT and the FAN switch turned to AUTO...
It's keeping the house melt,but when the thermostat reaches it's special temp... the fan won't turn rotten,and it slowly begin's blowing cool air? Also ? Their is a wishy-washy switch in the attic that controls the disciple,and it is ON ?? THANK'S !!!
How might one step something like removing a...
Answers:    The fan/limit control is set too low! Check the actual temperature of the "cool" nouns. It may well be stove than what your hand senses. Many highly developed efficiency furnaces will hold the fan "low cut-off" set at 65 degree. This will feel comparatively cool to your 98 degree mitt! Have a warm winter! ;-)=