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International Comfort Products T9MPT050F12B1 Defrost Sensor Board
The defrost sensor board will begin the defrosting phase which may be necessary to keep the outdoor unit free from frost build-up. It is influenced by a specific sensor that can be found near the condenser, in order to make the decision on when to begin.
Some clues the defrost sensor board is dead
- The control board might give out a specific error code referring to the failed defrost sequence
- The whole system may stop running due in part to lack of airflow through the outdoor unit
- The defrost sequence never starts despite that there is a large amount frost on the unit
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