American Dryer Corp. ML-145 - Manual (Page 40)

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C. Display is reading “Rotation Sensor Fail.”
1. Magnet and rotation read switch are out of adjustment.
2. Trunnion shaft has moved forward.
3. Magnet is missing.
4. Rotation read switch is broken.
5. Broken V-belt.
6. Faulty drive motor.
7. Faulty wiring connection between read switch and computer.
8. Faulty drive contactor.
9. Faulty computer (computer is not sensing rotation).
10. Faulty arc suppressor (A.S.) board.
D. Display is reading “NO Airflow.”
1. Blower motor is not coming on.
2. Blower motor is spinning in the wrong direction.
3. Dirty lint screen.
4. Exhaust is clogged and is in need of cleaning.
5. Sail switch damper is hung up.
6. Lint drawer or main door is not sealing.
7. Faulty sail switch (very tough).
8. Faulty wiring connection between sail switch and computer.
9. Faulty blower contactor.
10. Faulty arc suppressor (A.S.) board.
11. Faulty 24 V transformer.
12. Faulty computer board.