Inspect door for alignment and balance

Inspect tracks and clear obstructions

Check rollers and lubricate

Inspect hinges and lubricate

Check springs and lubricate

Examine cables for broken strands

Verify proper cable tension to prevent slipping

Assess drum alignment

Check bearings & lubricate

Inspect bottom rubber seal and lubricate

Examine weather trim for cracks

Clean sensor lenses and check alignment

Test manual release handle for emergencies

Inspect door panels and support struts

Check chain/belt tension

Inspect motor, alignment, mounting then operation

Test wall button control

Test keypad and remote controls

Inspect trolley for wear

Inspect end bearing plats for wear and alignment

Ensure bottom brackets are securely fastened

Inspect spring mounting pad

Adjust limit settings for maximized performance

Adjust door opener force settings