Wiser
Display Power / Backlight Instability
Thermostat backlight flickers or display intermittently dims
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Possible Causes
Weak batteries, Failing backlight driver, Loose connection to wall plate, Electrical noise on low-voltage supply
How to Fix / Troubleshooting
Safety first: For mains or 24V powered units, isolate power before removing from wall.
- Replace batteries: For battery models, install new alkaline cells.
- Reseat thermostat: Remove and refit the thermostat to ensure solid contact with the backplate.
- Check for vibration: Ensure the thermostat is firmly mounted and not subject to vibration from doors or pipes.
- If flicker continues: The backlight driver or display is failing. Replace the thermostat.
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Repair Difficulty
Very Easy
1/5
Required Part
Wiser Room Thermostat display / backlight circuit
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