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International Comfort Products N9MP1100F14C2 Defrost Sensor Board
The defrost control board determines when or if to start the defrost cycle which may be necessary to defrost your outdoor unit. The control board depends on a temperature sensor which is near the condenser somewhere, in order to verify when to begin.
Symptoms of a worsening defrost sensor board
- Your system could stop operating for the fact of the amount of frost on the outdoor unit
- The defrost feature refuses to run even though there is excessive frost on the external unit
- The primary control board may throw a specific error code if the defrost control board fails
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