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Have chamb erlain liftmaster prof 1/3 hp the motor runs but the door doesn't open . think that it must be off track but I don't know how to get it back on track. A little help please

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If the motor is running it's more likely that the gear inside is worned out. This is a common and cheap repair. If the chain had come off, the chain would be hanging down plus you can look at the sprocket and see if it's attached..

Posted on Dec 09, 2014

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Posted on Jan 02, 2017

  • 11 Answers

SOURCE: Sears Craftsman Garage Door Opener Wireless Keypad Model and a LiftMaster Chamberlain Professional Garage Door

Hello,

I had the same frustrating dilemma with my Craftsman LiftMaster garage door and Keypad, Model 139.53754-01 (dated 10/06; and has the # 315 MHz).

To resolve “the dilemma”, grab your keypad, climb up on a ladder to access the garage door opener’s motor unit. On the right side of the motor unit, remove the white plastic casing by pressing buttons on each side and pulling down. This will expose the programming area, and for our purposes, the “Learn” button.

1. On the motor unit, press and release the “Learn” button. The Learn indicator light will glow steadily for 30 seconds.

2. Within 30 seconds, enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold the ENTER button.

3. Release the ENTER button when the motor unit lights blink. The code has been “learned”/stored/activated.

Good Luck, and I Hope this Helps!
Gail
For possible future reference:

How to change an existing, known PIN
(Changing an existing PIN can be done with the wireless remote keypad, and does not require access of the motor unit.)

From the keypad:

1. Enter the four digits of the present PIN, then press and hold the # button. The opener light will blink twice. Release the # button.

2. Enter your new 4-digit PIN and press Enter. The motor unit lights will blink once when the PIN has been “learned”/stored/activated. Test by entering the new PIN, and pressing Enter.

Posted on Jun 24, 2008

  • 2 Answers

SOURCE: Chamberlain Liftmaster Professional 1/2 HP

Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.

Posted on Jul 25, 2008

  • 244 Answers

SOURCE: Liftmaster 1265LM 1/2 HP does not open or close with remotes

is chain moving. if not, gears are shot. if moving, is trolley connected.

Posted on Jan 15, 2009

Door Tech
  • 98 Answers

SOURCE: Garage door will not open properly

You might have a broken spring. Check on the a the header above the door there should be a tube with a drum on each end and 2 springs (maybe one) towards the center. If one of the springs has a gap (1-2 inches) in it. If it does you will need to call a door company in your area. I recommend you replace both springs. If you need to get you cars out some times you can help the operator to lift the door by lifting the door while the operator is lifting the door. Be very careful not to get your fingers in a pinch point and be sure to lower the door the same way.

Posted on Feb 07, 2009

  • 3197 Answers

SOURCE: Code reset button for garage door opener

The button is just to the left of where all those white wires go. You may have to remove a light lens to get to it.

Posted on Jun 08, 2009

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1 Answer

I have a Liftmaster Prof. 1/3 H.P. I close the garage with the garage door clicker, but when I come home hours later the garage door is OPEN. Please advise.


Very strange. I think there may be another remote being used unknowingly by someone or it is responding to someone else's garage door frequency. Is yours a rolling code type for enhanced security. If not it would be a good idea to upgrade.

Dec 18, 2014 | Building Materials

1 Answer

Motor runs but door won't open. checked chain, seems to be ok


Hello,

The problem is not the chain, it is the plastic gear in the unit of the liftmaster Garage Door 1/2 Hp.The plastic gear is not engaging, although it sounds like it is working.

You will have to replace it with a new one, then the liftmaster Garage Door 1/2 Hp will be able to open up once again.

Once you open and remove the old gear, Be sure to thread the screws in all the parts before you install them. Pre-threading them once would really help. Secondly, label the wires on the back of the opener before lowering it to the ladder, so you can put them back in their proper place.

Hope this was helpful.
Goodluck
Elect_Comp

Jun 27, 2011 | liftmaster Garage Door 1/2 Hp

1 Answer

Liftmaster 1/2 HP Garage Door opener won't open or close. Has been working fine until I pulled out this morning. The door will move freely if I disengage from opener. Went up ladder to see chain not...


The shaft on these garage door motors are not direct drive systems. You'll have to open up the box to see what the actual problem is. I have had stuff like this happen where a gear just slipped out of place.

http://www.aaadooropeners.com/?gclid=CLH3wt628p8CFVZS2goduwSLYQ

Here is a link for a parts supplier. I don't know your model but it looks like most of the Liftmaster worm screw gears and drive gears are plastic so it's possible that one of them has cracked.

Feb 14, 2010 | liftmaster Chamberlain Garage Door Opener...

4 Answers

Chamberlain 1/2 HP door opener will not work (102 1499A))


sounds like the clutch in the motor is slipping, perhaps the chain is getting kinked on something. check to make sure there is nothing in the way of it and that it is on track going into the motor

Jun 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door won't open or close


If you have a Chraftsman/Liftmaster:
1.Check to see if the door is running correctly.  A. Run the door down and pull the emergency release. See if the door will run easily by itself.
  1. If it runs hard by hand try lubricating the rollers and hinges with silicone spray or some form of lubricant (not WD 40)
  2. If the door is heavy and falls back to the ground, you probably have a spring issue (either broken or needs more tension) in this case call a professional door repair company in your area.
2. If the door runs fine your gears might br out of your opreator. Open the case and look for a white powder. If you see that and your gears look worn repace the gears with 41c4220a gear kit.
( with the 5 flashing the traveler is jammed up against the top bolt. The same part will fix the problem be sure to replace the bottom bushing on the motor bracket.)

Feb 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opens about 18" and stops


Check the drive belt for tightness. Check for a bent or obstructed track. Overhead door openers have a safety clutch built in in case something or someone gets into the path.

Jan 31, 2009 | Sears Craftsman LiftMaster Chamberlain...

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