Door will not move; opener beeps and shows E7 or seven flashes; travel limits cannot be set or are lost repeatedly.

Safety first: Disconnect power before working inside the opener. Do not force the drive mechanism by hand.

• Step 1 – Attempt limit re‑learn: Follow the B&D manual to re‑learn open and close limits. If the opener will not enter learn mode or aborts with E7, proceed to inspection.
• Step 2 – Inspect encoder assembly: Remove the opener cover and locate the travel encoder (often a small sensor near the motor or drive sprocket, sometimes with a slotted wheel). Check that it is firmly mounted and that the encoder wheel is not cracked or rubbing.
• Step 3 – Clean encoder wheel: Use compressed air or a soft brush to remove dust and debris from the encoder wheel and sensor gap.
• Step 4 – Check wiring: Inspect the encoder harness from the sensor to the control board for pinched, broken, or unplugged connectors. Reseat any loose plugs.
• Step 5 – Replace encoder: If wiring is intact and cleaning does not help, replace the encoder assembly with a compatible B&D part. After replacement, perform a full travel limit learn cycle.