Your garage door opener is programmed with self-diagnostic capabilities. The diagnostic LED will flash a number of times, then pause, signifying it has found a potential issue.
Consult Diagnostic Chart below.

1 FLASH

Safety reversing sensors wire open (broken or disconnected)

OR

2 FLASHES

Safety reversing sensors wire shorted or black/white wire reversed

3 FLASHES

Door control or wire shorted

4 FLASHES

Safety reversing sensors slightly misaligned (dim or flashing LED)

5 FLASHES

Motor RPM is not recognized

9 FLASHES

Cable tension monitor reversal

10 FLASHES

Limits and forces need reprogramming

11 FLASHES

Limits and forces need reprogramming

12 FLASHES

Attempting to compensate

13 FLASHES

Attempting to compensate

Diagnostic LED

Installed Safety Reversing Sensor

SYMPTOM: One or both of the Indicator lights on the safety sensors do not glow steady.

  • Inspect sensor wires for a short (staple in wire), correct wiring polarity (black/white wires reversed), broken or disconnected wires, replace/attach as needed.
  • Disconnect all wires from back of garage door opener.
  • Remove sensors from brackets and shorten sensor wires to 1-2 ft. (30-60 cm) from back each of sensor.
  • Reattach sending sensor to garage door opener using shortened wires. If sending sensor indicator light glows steadily, attach the receiving sensor.
  • Align sensors, if the indicator lights glow replace the wires for the sensors. If the sensor indicator lights do not light, replace the safety reversing sensors.

SYMPTOM: The door doesn’t activate from the door control.

  • Inspect door control/wires for a short (staple in wire), replace as needed.
  • Disconnect wires at door control, touch wires together. If garage door opener activates, replace door control.
  • If garage door opener does not activate, disconnect door control wires from garage door opener. Momentarily short across red and white terminals with jumper wire. If garage door opener activates, replace door control wires.

SYMPTOM: Sending indicator light glows steadily, receiving indicator light is dim or flashing.

  • Realign receiving sensor, clean lens and secure brackets.
  • Verify door track is firmly secured to wall and does not move.

SYMPTOM: Door travels 2-3 inches and stops.

  • Reprogram limits and forces. See Adjustment section.
  • If the motor unit continues to travel 2-3 inches, check the travel module connection or replace the travel module.

SYMPTOM: No movement, motor runs 2-3 seconds.

  • Reconnect the emergency release.
  • Motor may need to be replaced.

SYMPTOM: Door stops and reverses while closing.

  • Check for possible door obstructions and remove.
  • Check that the cable tension monitor is properly connected to the opener.
  • Replace the cable tension monitor.

SYMPTOM: Door stops while opening.

• Reprogram limits and forces. See Adjustment section.

SYMPTOM: Door stops and reverses while closing.

• Reprogram limits and forces. See Adjustment section.

SYMPTOM: Door stops and reverses while closing.

• Garage door opener will try to compensate three times before turning to a 10 Flash.

SYMPTOM: Door stops while opening.

• Garage door opener will try to compensate three times before turning to a 11 Flash.

The garage door doesn’t operate from the MyQ® Home Control App or website.

• When using Model 580LM Alternate Power Supply or when in Battery Backup mode, the LiftMaster® Internet Gateway will not activate the garage door through the MyQ® Home Control App. If you wish to use the LiftMaster® Internet Gateway with your garage door opener, please contact your local electrician to wire an outlet next to the garage door opener.

The garage door opener doesn’t operate from either the Door Control or the remote control:

  • Does the garage door opener have electric power? Plug a lamp into the outlet. If it doesn’t light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.)
  • Have you disabled all door locks? Review installation instruction warnings on page 7.
  • Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction.
  • The garage door spring may be broken. Have it replaced (see page 3 for reference).
  • If the yellow command LED does not turn on, reverse the wires connected to the RED and WHT terminals of the control panel. Replace wire if necessary. The yellow and red LEDs on the Door Control are blinking quickly:

• The control panel is charging, and may take up to 5 minutes to become operational.

My remote control will not activate the garage door:

Verify the lock feature is not activated on the door control.

Reprogram the remote control.

If the remote control will still not activate the door check the diagnostic codes to ensure the garage door opener is working properly.

The remote control has short range:

Change the location of the remote control in your car.

Some installations may have shorter range due to a metal door, foil backed insulation, or metal garage siding.

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.

The door opens but won’t close:

Check cable tension monitor (see Installation Step 4).

If the garage door opener lights blink, check the safety reversing sensor (see Installation Step 9).

If the garage door 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.

The door reverses for no apparent reason and garage door opener lights don’t blink:

  • Check cable tension monitor (see Installation Step 4).
  • 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.

My door will not close and the light bulbs blink:

The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. • Verify the safety sensors are properly installed, aligned and free of any obstructions.

The garage door 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 garage door opener and call a trained door systems technician.

The garage door 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 garage door opener, door may be locked. Disable the power door lock.

The garage door 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 is connected, the opener should be able to operate up to 20 times without power.

Door loses limits.

• Collar not tightened securely. Tighten collar (see Assembly Steps 1 and 2) and reprogram limits (see Adjustment Step 1).

The garage door opener 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 opener is mounted at a right angle to the jackshaft. If not, move the position of the mounting bracket.

Power lock makes noise when operating.

Call us for a new Door Lock

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Tillsonburg Garage Doors

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