Delta Dore Display / Backlight Degradation

Thermostat backlight or display is very dim or partially unreadable, but device still controls heating.

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

Aging LCD or LED backlight, Loose display connector, Minor power supply sag, Physical damage to screen

Safety first: Disconnect power or remove batteries before opening the thermostat.

Adjust brightness: Check if the thermostat has a display brightness setting and increase it.
Inspect for damage: Look for cracks or impact marks on the display.
Reseat front module (if modular): On some models, gently remove and reseat the front display module onto the base.

If the display remains dim or partially blank, the screen or backlight has likely failed. The front panel or entire thermostat should be replaced.

Medium 3/5

Delta Dore Thermostat Display Module

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