AF Air Flow signal

The Cabrio Steam Dryer is 1 year old if that. The AF signal light keeps coming on during every cycle, we have taken apart the dryer and cleaned every bit of the air flow chambers and still have the AF signal come up. So far we have tried everything that the manual recommends. As far as my husband can tell it is not the Air Flow that is causing this issue. My husband is very thourough and quite a tradesman, this is stumping us. It gets hot but not dry maybe the heater core? Anyone have an idea?

Thanks csponga

Did you clean the dryer vent line? Make sure the vent outlet is not clogged.

Gene.