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International Comfort Products HAC042AKA1 Defrost Sensor Board
The defrost control board instructs the system to activate the defrost sequence if necessary, to defrost your outdoor unit. It is influenced by a specific sensor which is near the condenser somewhere, in order to decide when to begin.
Major signs your outdoor defrost sensor board has very little life left
- The HVAC system could stop functioning due in part to frost blocking the fins on the outside unit
- Self defrost sequence never starts despite that there is a large amount frost on the outdoor unit
- The primary control board might issue a particular error code produced when the defrost board is bad
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