Door stops and reverses a short distance after starting to close; opener displays E3 or three flashes; may occur more in colder weather or mid‑travel.

Safety first: Never loosen or adjust torsion springs, extension springs, or their anchor hardware unless you are a trained technician. Springs are under high tension and can cause serious injury.

• Step 1 – Check for obvious obstructions: Inspect the tracks, bottom of the door, and floor for tools, debris, or ice buildup. Remove any obstruction and test again.
• Step 2 – Manually test door balance: Pull the emergency release cord with the door fully closed to disengage the opener. Lift the door by hand. It should move smoothly and stay at mid‑height without dropping or shooting up. If it is heavy or jerky, the door hardware or springs need service by a door technician.
• Step 3 – Lubricate moving parts: With the door disconnected from the opener, apply a light garage door lubricant to the rollers, hinges, and pivot points (not the plastic parts of the opener). Wipe off excess.
• Step 4 – Check track alignment: Ensure the vertical and horizontal tracks are parallel and not pinching the rollers. Slightly loosen track brackets and adjust if necessary, then retighten.
• Step 5 – Reconnect opener and reset force limits: Re‑engage the trolley to the opener. Follow the B&D manual to re‑set or re‑learn travel and force limits (often involves holding the SET or LIMIT button and running a full open/close cycle). Do not over‑increase force; the door should move smoothly with moderate force settings.
• Step 6 – If E3 persists: If the door is mechanically sound but the opener still reports excessive force, the force sensing circuit or motor may be failing. Contact a technician to test and possibly replace the control board or motor assembly.