Having a Problem? (Continued)
5. The garage door opens and closes by itself:
•Be sure that all remote control push buttons are off.
•Remove the bell wire from the door control terminals and operate from the remote only. If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between the control console and the motor unit.
•Clear memory and
6. The door doesn't open completely:
•Check power door lock.
•Is something obstructing the door? Is it out of balance, or are the springs broken? Remove the obstruction or repair the door.
7. The door opens but won't close:
•Check cable tension monitor.
•If the opener lights blink, check the safety reversing sensor. See Installation Step 9.
•If the opener lights don’t blink and it is a new installation. See Adjustment Step 2. For an existing installation, see below.
Repeat the safety reverse test after the adjustment is complete.
8.The door reverses for no apparent reason and opener lights don’t blink:
•Check cable tension monitor.
•Is something obstructing the door? Pull the emergency release handle. Operate the door manually. If it is unbalanced or binding, call a trained door systems technician.
•Clear any ice or snow from the garage floor area where the door closes.
•Review Adjustment Step 2.
Repeat safety reverse test after adjustments.
9.The door reverses for no apparent reason and opener lights blink for 5 seconds after reversing:
•Check the safety reversing sensor. Remove any obstruction or align the receiving eye.
See Installation Step 9.
10. The opener strains to operate door:
•The door may be out of balance or the springs may be broken. Close the door and use the emergency release handle to disconnect the door. Open and close the door manually. A properly balanced door will stay in any point of travel while being supported entirely by its springs. If it does not, disconnect the opener and call a trained door systems technician.
11. The opener motor hums briefly, then won't work:
•The garage door springs may be broken. See above.
•If the problem occurs on the first operation of the opener, door may be locked. Disable the power door lock.
12. The opener won't operate due to power failure:
•Manually open the power door lock.
•Use the emergency release handle to disconnect the door. The door can be opened and closed manually. When power is restored, pull manual release a second time.
•If a Battery Backup Unit is connected, the opener should be able to operate up to 20 times without power.
13. Door loses limits.
•Collar not tightened securely. Tighten collar
(see Assembly Steps 1 and 2) and reprogram limits (see Adjustment Step 1).
14.The operator moves when the door is in operation:
•Some minor movement is normal for this product. If it is excessive the collar will wear prematurely.
•Check to make sure the torsion bar is not moving left/right excessively.
•Check to make sure the torsion bar is not visibly moving up and down as it rotates.
•Check that the operator is mounted at a right angle to the jackshaft. If not, move the position of the mounting bracket.
15. Power lock makes noise when operating.
•Call Liftmaster® dealer for replacement power lock.
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