Motor Connector Tightness Check

Symptoms

• Motor does not move at all

• Door does not open or close when commanded

• Motor can be heard engaging but produces no motion

• Intermittent operation after handling or transport

Cause

The motor is not tightened enough. If the motor mounting hardware is too loose, the motor shaft does not stay properly aligned under load. This prevents effective torque transfer and can cause the motor to slip or fail to engage.

Correct Gap Specification

The motor must be tightened to leave a small, controlled gap.

• Required gap: approximately 0.15 to 0.20 inches

• Less than this can cause motor electronics not to connect properly

• More than this usually means the motor is too loose

A gap larger than 0.20 inches is a common cause of the motor not operating.

How to Check

1. Inspect the motor mounting location.

2. Verify the motor is not loose or able to shift by hand.

3. Measure the gap between the motor and the mounting surface.

4. Confirm the gap is within the 0.15 to 0.20 inch range.

How to Fix

1. Tighten the motor mounting hardware gradually.

2. Stop tightening once the gap is within 0.15 to 0.20 inches.

3. Ensure the motor is firmly secured and cannot move under hand pressure.

4. Do not overtighten past this range.

After Adjustment

After tightening the motor and setting the correct gap, try controlling the door once again

If the motor still does not operate after this adjustment, disconnect and reconnect the motor connector and repeat the steps.