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Outdoor Hardie Controller Display Flashes Rapidly: Moisture Damage Fix

Outdoor-Mounted Hardie Controller Acts Erratically: Dry It Out

Display flashes rapidly in programming mode. Likely moisture inside the enclosure causing phantom button presses or trace corrosion.

Immediate Fix

1. Shut off power (breaker or unplug transformer). 2. Open cabinet, aim hair dryer on LOW/COOL at circuit board for 5–10 minutes. 3. Leave door open in sun for 1 hour (if weather permits). 4. Reapply power, test.

If That Fails

Remove battery, disconnect AC, wait 3+ hours (deep discharge caps).
Conformal coating spray on board (if you're handy).
Relocate controller indoors or in a NEMA 3R weatherproof box.

Hardwired?

If no plug-in transformer, it's hardwired to a junction box. Turn off that breaker.

Moisture is the #1 killer of outdoor-mounted controllers. Dry it, seal it, or move it.

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