Heatit Display Backlight or Power Regulation Issue

Thermostat display is very dim or backlight flickers

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Low supply voltage, Failing internal power regulator, Aging LED backlight, Loose neutral connection

Safety first: Turn OFF power at the breaker before accessing wiring.

Steps to troubleshoot:

1. Check supply voltage and wiring:
- Verify tight connections at L and N terminals.
- Measure voltage to ensure it is within specification.
2. Test on different circuit:
- If possible, temporarily power the thermostat from a known good circuit to rule out supply issues.
3. Replace thermostat:
- If supply is stable but display remains dim or flickers, the internal backlight or regulator is failing.
- Replace the thermostat.

Medium 3/5

Heatit Smart Thermostat (display/backlight)

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