Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Liftmaster mod 1245R (1999) has indicator lightLiftmaster mod 1245R (1999) has indicator light blinks 5 times. Door will not operate from hardwire button. Tried unplugging unit to reset but same 5 blink sequence returned. Held button in to reset but no difference. Only get clicking sound at control unit when hard-wire button pushed. Need help! More Liftmaster mod 1245R (1999) has indicator light blinks 5 times. Door will not operate from hardwire button. Tried unplugging unit to reset but same 5 blink sequence returned. Held button in to reset but no difference. Only get clicking sound at control unit when hard-wire button pushed. Need help! Thanks. Comments: Nov 15, 2009 - Don, Thanks for help but door was not in open position. It was unattached to trolley that was in the full down position. The chain seemed tight when I connected the door to the trolley so I loosened the lock nuts and took some tension off the chain. Tried turning the travel controls and pressure controls to see it would operate but it only clicks when hard-wire button pushed. Thanks, Paul See less Solution #1 posted on Nov 14, 2009 Don0930 Rank: Guru Expert Rating: 88.38% , 441 votes If your door is in the open position and the trolley is jammed against the bolt just in front of the motor unit you need to remove the bolt and then run the opener until the door closes. While the door is closed locate the 'up limit control' on the side of the motor unit and turn the control a couple complete turns in the opposite direction of the arrow printed on the cover.

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Hi.

5 Blinks means RPM sensor failure or motor overload.

As a result the motor will not operate, or the trolley will get stuck on the stop bolt, with motor humming briefly and RPM sensor stuck.

Cut power to the unit to reset.

Wait thirty minutes before re-connecting power to allow the over heated motor cooling down.

If it is still flashing when you connect power back, then the RPM sensor must be replaced.

Regards.


Posted on Nov 16, 2009

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SOURCE: Liftmaster mod 1245R (1999) has

The LED flashing 5 times is the code for "RPM sensor or motor overload". Usually if it is the RPM sensor - which is a small printed circuit board just in front of the motor - it will run a few inches and then reverse. I doubt very much it is the motor. I would pull the logic board and check for loose or missing traces on the printed circuit. Especially if you have had any electrical storms or power surges.

Posted on Nov 16, 2009

Testimonial: "Thanks very much. I will pull the board and check it."

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The trolley is most likely jammed against the bolt just in front of the motor unit. Remove the bolt and then run the door until it is closed. Now locate the 'up limit' control on the side of the motor unit. Turn this 2 complete turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt.

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The LED flashing 5 times is the code for "RPM sensor or motor overload". Usually if it is the RPM sensor - which is a small printed circuit board just in front of the motor - it will run a few inches and then reverse. I doubt very much it is the motor. I would pull the logic board and check for loose or missing traces on the printed circuit. Especially if you have had any electrical storms or power surges.

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