Hardie Controller Displaying Random Characters: Reset Procedure

Hardie/JH controller flashes random digits/characters. Unresponsive to dial changes, station switching, or off position. Set to "no rain" for winter.

Reset Procedure

Open the enclosure.
Use canned air (electronics duster) to blow dust/spiders off the circuit board—both sides.
Do not use liquids or brushes aggressively.

The microcontroller or display driver is likely failed. Replace the controller. Hardie controllers of this vintage are not economically repairable.

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