Garage door opener runs but door is very noisy (grinding, rattling, or squealing) during operation

Safety first: Disconnect power before tightening hardware or working near moving parts. Do not place fingers near rollers or hinges.

• Lubricate moving parts: Apply a garage‑door‑specific lubricant to metal rollers, hinges, and the torsion spring (if accessible). Do not over‑lubricate tracks.
• Adjust chain tension: On chain‑drive Skylink models, tighten the adjustment nut until there is about 1/4" sag at the midpoint of the chain. Do not overtighten.
• Inspect sprocket and rail: Check the drive sprocket on top of the opener for wear or wobble. Replace the Skylink drive sprocket kit if teeth are worn or the shaft is loose.
• Secure mounting: Tighten all opener mounting bolts and the header bracket. Loose hardware can cause vibration and noise.