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Some steps to help you identify and isolate your garage door operator woes:

  1. Check the power. Is the operator plugged in? Has a breaker been tripped? Do you need to replace the batteries in your remote?
  2. Is the operator trolley latched to the door (if not, you may have discovered your problem)? If so, disconnect the door from the operator by pulling the emergency release (red handle, attached to rope and latch) down and release the latch.
  3. DOOR WON'T GO UP: Once the operator and door are disconnected, try and lift the door manually. If the door is hard to lift or very heavy then the problem may be the springs, rollers or hinges rather than the operator itself. If the door is easy to lift, you should reconnect the door and try operating again.
  4. DOOR WON'T GO DOWN: Once the operator and door are disconnected, press the button to see whether the lights flash. Also, check that the door's photo eyes are unobstructed and correctly positioned (sunlight, items dangling from the bottom of the door and ill positioned eyes can set off the safety feature and prevent the door from going down.
  • Programming Liftmaster Opener

    Liftmaster Operator Programming

    The following is a brief guide to help assist builders/homeowners with on site Liftmaster operator repairs.  Full instructions are available on the web at www.liftmaster.com.

    • Remotes and operators must operate on the same frequency- be sure to check operator model number!!
    • For Homelink instructions, see attached instructions or the web at www.homelink.com

    SETTING REMOTES

    1. Press and release learn code button (purple, red, green) on the back of the motor head.
    2. Press the remote for that door 3-4 times until the door begins to move.
    3. Repeat steps 1 and 2 to program additional remotes to additional doors
    4. If programming a multiple button remote to additional doors, repeat steps 1 and 2 for the additional buttons.

    SETTING KEYPADS

    1. Press and release learn code button (purple, red, green) on the back of the motor head.
    2. Within a few seconds, Press your personalized four digit code on the keypad and then press and release the “enter” key 3-4 times until the door begins to move. (be sure not to block the sensor eye beam while setting the keypad or set code prior to mounting keypad.
    3. Repeat steps 1 and 2 for additional doors. (one keypad can be used on several doors) 

    GARAGE DOOR OPENS BY ITSELF OR 1 REMOTE OPENING MULTIPLE DOORS

    1. Ensure all remotes are off.
    2. Clear memory by pressing and holding the learn code button (green, red, purple) on each motor head for 10 seconds.
    3. Reset all remotes/keypads per above.

      

    GARAGE DOOR OPENS WITH REMOTE/WALL BUTTON, BUT WILL NOT CLOSE WITH REMOTE OR WALL BUTTON, DOOR WILL BEGIN TO CLOSE, BUT REVERSES IMMEDIATELY AND LIGHT BULB FLASHES. GARAGE DOOR WILL CLOSE IF THE WALL BUTTON IS PUSHED IN AND HELD.

    Most likely, this is a problem with the sensor eyes

    1. Ensure sensor eye wiring contacts, where spliced into pre-wire, are connected properly.  If not, splice properly.
    2. Check that the 2 sensor eyes mounted on the track, are:
    3. If sensor is illuminated weakly or flashing, adjust sensor eye by moving slightly up, down, in, or, out until it becomes solid.
    4. If sensor eyes will not illuminate, more detailed maintenance is required.
    5. Mounted at the same height on both sides
    6. Light not flashing or very faint, and there are no obstructions blocking the sensor beam such as spider webs, garbage cans, paint, etc.  Each sensor eye should have a small fluorescent light that is illuminated.

    OPERATOR WILL NOT OPEN OR CLOSE AND HAS NO POWER

    1. Ensure outlet has power.
    2. Sometimes, the operator will overheat or sustain a power surge. If this occurs, unplug the operator for 10 minutes and plug back in. If the operator does not work after this, further detailed maintenance is required. 
  • Programming Linear Operator

    Troubleshooting Guide

    DIAGNOSTICS FOR FLASHING COURTESY LIGHT ARE LOCATED ON BACK OF OPERATOR AND IN MANUAL

    Operator works from wall station but not transmitters

    1. Check operator for number of fl ashes from courtesy light.
    2. There should only be ONE lighted wall station attached per operator.
    3. Check vacation switch.
    4. Use your Linear FT-1 to verify transmitter is working. If not, replace battery.
    5. Check receiver with FT-1 to verify it is working. If not, replace control board.
    6. Learn transmitter into operator.
    7. If learn LED light on operator is fl ashing rapidly or constant red, radio receiver is experiencing interference.
    8. If interference is present, use the FT-1 to locate interference

    Operator works from transmitter but not wall station

    1. Check wall station wiring. Should be on terminal one and two at operator.
    2. Check rear of wall station for “bunched or binding” wire against board.
    3. Check wall station wire for shorts.
    4. Replace wall station.

    Door goes down a few inches stops and reverses

    1. Check operator for number of fl ashes from courtesy light. (Four fl ashes.)
    2. Check for proper balance of door.
    3. Check door force settings.

    Door goes down a few inches stops and reverses

    1. Check operator for number of fl ashes from courtesy light. (Four fl ashes.)
    2. Check for proper balance of door.
    3. Check door force settings. (Three fl ashes.)
    4. Check beam alignment and beam wires for shorts.
    5. Check for proper connections at beam and at operator.
    6. Replace beams.
    7. If door goes down all the way by holding constant pressure on wall station YOUR BEAMS OR BEAM
    8. WIRES ARE THE PROBLEM! (DO NOT REPLACE LOGIC BOARD!)

    Door goes up without activating transmitter or wall station

    1. Check wall station wires for short.
    2. Check that wall station screws are not over tightened.
    3. Check all connections at operator and wall station for proper connections and for broken or touching wire ends.
    4. If problem still exists, erase and then reprogram all transmitters and wireless keypads.

    Transmitter will not learn into operator

    1. Check transmitter and radio receiver using your FT-1.
    2. If learn LED is solid or has a rapid fl ash the radio is seeing interference. Receiver cannot learn transmitter until interference is removed.
    3. Using your FT-1 locate and remove interference.

    Door will not open all the way out of the opening

    1. Operate door to its down limit. Determine carriage location.
    2. The distance from back of pulley assembly bracket to front of carriage is 4”-6”. If not, relocate carriage to proper position per the installation instructions.

    Operator will not go into vacation mode

    1. Vacation mode only affects the transmitter. Door will still operate from wall station.
    2. Operator must be on the down limit before unit will go into vacation mode.
    3. Vacation mode will not operate if an external receiver is installed.
    4. Replace wall station.

    Unit will not operate from wall station or transmitter

    1. Four fl ashes – let operator cool down for 10-15 minutes.
    2. Check house AC power.
    3. Disconnect all wires from terminals. Short across terminals 1 & 2 Operator should start up or will go down with constant short on terminals.
    4. Check all wires for installation to correct terminals and all connections for shorts.
    5. Check wire harness connections to logic board.
    6. Check capacitor.
    7. Check limit assembly to make sure both limits are not closed.

    Unit will not stop on up or down limit

    1. Check limit wiring connection to the logic board.
    2. Check wiring to limit assembly.
    3. Check door travel on limit assembly for proper contact with up or down limit.
    4. Replace limit assembly.
    5. Replace control board.

    Light bulbs burning out

    1. Check unit for excessive vibration.
    2. Replace bulb with “rough service” bulb.
    3. Check bulb installation for tightness and or cross threading.
    4. Check socket threads and center contact.
    5. Replace socket assembly.

    Short range from transmitter – Radio interference

    1. Check transmitter battery.
    2. Try a different MEGACODE transmitter.
    3. Radio interference is identifi ed by a fl ashing or solid learn LED.
    4. (a) If multiple operators in the same garage check for fl ashing or solid learn LED’s on ALL operators. If this is the case, you have outside interference. Use your FT-1 to determine the cause of the interference.
    5. (b) If only one of the operators’ learn LED is on, you probably have crosstalk between units. This can be confi rmed by unplugging the unit(s) that is not showing a solid learn LED and then the problem unit starts to work properly. If this is the case, cut the red jumper on the back of the control board on the unit that was unplugged. Note the older units did not have a RED jumper. If you have an older unit, replace the control board

    Learning Linear MEGACODE transmitters into “most”
    HomeLink systems

    1. Refer to vehicles installation manual.
    2. MEGACODE transmitters only transmit for 10 seconds.
    3. Press and hold transmitter button down for 8 seconds then release and quickly press and hold again. Repeat until transmitter learns into the HomeLink receiver.
  • Wayne Dalton Assistance

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