Marantec Stuck Light Relay or Misconfigured Light Control

Opener light stays on continuously and will not turn off after the usual timeout.

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

Failed light relay on Marantec board, Wall console light button latched on, Shorted light control wiring, Incompatible bulb causing feedback

Safety first: Unplug the opener before inspecting wiring or board.

Check wall console: Press the light button on the Marantec wall station to toggle the light. Ensure it is not stuck.
Test with bulb removed: Remove the bulb and see if the light output circuit still shows voltage (requires meter). If so, the relay is likely stuck.
Try different bulb: Install a manufacturer‑approved bulb type and wattage.
If always on: Replace the Marantec control board to correct the stuck light output.

Medium 3/5

Marantec Control Board

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