Question about Craftsman 3/4 Hp Garage Door Opener System Belt Drive Motorhead Only

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How to fix my garage door opener?

Why wont my 3 remotes (hand held & factory in remote)only work to close door ? They no longer work to close door.I did replaced the batteries and reprogramed, craftsman 3/4hp chain driven garage door opener. Attached wired switch still works

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A garage door that won't close via the remotes can be mis-aligned sensors but if that is the case you normally have to hold down the wall switch to force it to close. In my case none of the remotes would close the door. A simple tap of the wall switch would close it every time. In fact, the wall switch always worked normally except that it sometimes could not stop the door in the middle of an open or close. The sensors were aligned. I could tell by the LEDs on the sensors. The remotes would work once if the door was in a position for a long time (hours). Any further use of the remotes failed. The problem was a bad circuit board in the garage door controller. You can buy replacement boards from around $70-$100. I repaired mine. My unit is a LiftMaster 1245R, 41A5021-1C on the back label. These are the same as Chamberlain units.

To remove the circuit board first unplug your controller. Then disconnect the wires on the 3 terminals in the back (the side that faces away from the garage door). Remember which wires went on which terminals. Next there are 4 screws to remove on this back panel. With the screws removed the back panel will be loose but there is a wiring connector on the inside at the top of panel. Simply pull on this connector to separate the wires from the back panel. Now you can take the back panel (with circuit board attached) inside to work on the electronics.

There are 5 screws that hold the circuit board to the back plastic cover. Remove the to get access to the front of the circuit board. Looking at the component side of the circuit board look for capacitor C22. It is a 330uF 35V 85c part. It is the largest capacitor and is located on the left side right next to the transformer. Because it is located right next to the transformer and the transformer gets hot, the capacitor will eventually cook. Mine had a slight discoloration on the side nearest the transformer but otherwise looked normal. I replaced this capacitor, re-assembled the unit, and my garage door now works properly with all remotes.

Posted on Oct 23, 2016

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I'm assuming you mean that it won't close, only open? If that's the case then your eye beams may need to be adjusted. The wall button can override the sensors whereas the remotes can not.

Posted on Jan 20, 2015

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Posted on Jan 02, 2017

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SOURCE: craftsman 3/4 hp garage door opener

not sure, but see the users manual here:

http://www.manualslib.com/manual/32293/Craftsman-139-5399.html

Posted on Mar 10, 2013

swolfinor
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SOURCE: Why wont my 3 remotes (hand held factory in remote)only work to open the door ? They no longer work to open the door.I did replaced the batteries and reprogramed, craftsman 3/4hp chain driven garage d

SOUNDS LIKE SOMEONE MAY HAVE PRESSED THE LOCK / VACATIONS SWITCH ON YOUR WALL CONTROL. IF STILL NOT WORKING AND THE LED IN THE WALL SWITCH IS NOT FLASHING TRY AGAIN TO PROGRAM YOUR REMOTES.

GOOD LUCK

STEVE

Posted on Dec 15, 2014

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1 Answer

Why wont my 3 remotes (hand held & factory in remote)only work to open the door ? They no longer work to open the door.I did replaced the batteries and reprogramed, craftsman 3/4hp chain drive


It could be that your door is binding on the way up and so it stops automatically. Try releasing the emergency pull cord and move the door up and down by hand to see if it is binding, probably near the bottom. The track may be misaligned or there could be something rubbing against the door.

Dec 15, 2014 | Craftsman 3/4 Hp Garage Door Opener System...

1 Answer

Why wont my 3 remotes (hand held factory in remote)only work to open the door ? They no longer work to open the door.I did replaced the batteries and reprogramed, craftsman 3/4hp chain driven garage d


SOUNDS LIKE SOMEONE MAY HAVE PRESSED THE LOCK / VACATIONS SWITCH ON YOUR WALL CONTROL. IF STILL NOT WORKING AND THE LED IN THE WALL SWITCH IS NOT FLASHING TRY AGAIN TO PROGRAM YOUR REMOTES.

GOOD LUCK

STEVE

Dec 15, 2014 | Craftsman 3/4 Hp Garage Door Opener System...

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craftsman garage door openers are made by chamberlain.. Give them a call on their 800 number with your craftsman model number and they will help you

Aug 23, 2014 | Sears Craftsman LiftMaster Chamberlain...

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Check to make sure the door sensors are pointed at one another and the small light on each one is lit and not flickering. If you cannot get both lights to come on then your sensors have failed.

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If this is the 3 button HomeLink Transmitter usually centered overhead above the rear-view mirror, this should work:

While the engine is turned off follow these steps to program up to three channels:
1. Decide which one of the 3 channels (one of the 3 HomeLink buttons) you want to program.
2. Press & hold the desired button through step 3.
3. When the HomeLink indicator light begins to blink slowly(this may take up to 30 seconds), hold your hand-held garage door remote about 1 to 3 inches away from the buttons & then press and hold the button on your garage door remote. Continue to hold both buttons until the indicator light on the HomeLink begins to flash rapidly(this may take up to 90 seconds).

If it still doesn't work, make sure the batteries in your garage remote are not weak, and try again moving the remote back & forth and left & right or turning it upside down while programming.

Also note HomeLink will not work with older garage door openers, especially not with ones manufactured before April 1st 1982.


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1 Answer

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it is possible that when you programmed the car remotes you erased the pairing between your hand held remotes and the unit. Follow the instructions to pair the remotes again and you should be good to go.

Sep 16, 2009 | liftmaster Chamberlain Garage Door Opener...

1 Answer

I have 2 liftmaster 3245. The hand held remotes were working fine then stopped. I replaced the batteries and turned of all electrical/RIF close by. Still not working. Both cars operate the doors with no...


You need to reprogram the remotes by briefly pushing the learn button on the garage door opener until it flashes once, then release the button on the garage door opener.

Now press the remote button once until you hear the garage door opener click, now press the remote button once again and the remote should be programmed to work for that garage door opener.

DO NOT press and hold the garage door opener learn button for more than 10 seconds or you'll erase all programs and have to relearn all the remotes, including your car ones.

Hope you found this very helpful and best regards.

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2 Answers

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find attena and point it to your door if this does not work try adding a piece of wire to attena and making it longer also always check batts...

Apr 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

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