Sommer opener does not respond to remote controls, display shows E5 or flashes when trying to program remotes.

Note: Always verify the remote model matches the Sommer opener series (e.g., 310 MHz for older US models, 315/868 MHz for newer/European models).

• 1. Test wall control: Confirm the door operates from the wired wall button. If not, the issue is not just radio; see wall control diagnostics.
• 2. Clear remote memory: On the Sommer head, press and hold the LEARN button until the LED flashes rapidly (check manual for exact timing) to erase all remotes. This resolves memory‑full conditions.
• 3. Re‑program a single remote: Press the LEARN button once, then press the remote button until the opener light blinks or clicks. Wait a few seconds and test.
• 4. Check for interference: Temporarily unplug nearby RF devices (baby monitors, wireless doorbells, LED shop lights) and test again. Move the opener’s antenna wire so it hangs straight down and is not wrapped around power cables.
• 5. Try a known‑good remote: If another Sommer remote works, replace the non‑working remote. If none work but wall button does, the radio receiver section of the control board may be defective.