Why is the blue low temp LED on?

The blue LED lit solid indicates when the temperature falls to 32 °F (0 °C) for all set-points except the 30 °F (-1.1 °C) set-point. For the 30 °F (-1.1 °C) set-point the LOW TEMP alarm will indicate when the temperature drops to 28 °F (-2.2 °C).

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