For what ever dumb reason ,I did not take the blower duct off the back of the unit when I started on this job. When I took it off I found it was almost completely clogged with dirt and lint. After I cleaned it out the air flow was restored to the proper level. I still have the situation where the heater is on when I dont believe it should be . I dont know if I will replace all the sensor parts yet or not but still looking for advice.