Craftsman 3/4 Hp Garage Door Opener System Belt Drive Motorhead Only - Answered Questions & Fixed issues

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.

Don't know what make of opener you have, but make sure the eyes a pointing at each other.. On a Chamberlain product you should have one amber and one green. On a genie you should have a solid red light

Add a wire extension to the motor set antenna.

[PDF]GARAGE DOOR OPENER Model 3265 1/2 HP ... - LiftMaster

www.liftmaster.com/.../en.../tucmanuals/114A3044.pdf Chamberlain GroupThe Chamberlain Group, Inc. 845 Larch Avenue. Elmhurst ... Please read this manualand the enclosed safety materials carefully! ? Fasten the manual near the ...

check that none of the springs are broken. can you manually push it up the rest of the way?

Motor has overheated; the motor unit does not operate or trolleyis stuck on stop bolt = Motor unit hums briefly; RPM Sensor =Short travel 6-8" (15-20 cm).• Unplug unit to reset. Try to operate motor unit, check diagnostic code.• If it is still flashing 5 times and motor unit moves 6-8" (15-20 cm), replace RPMsensor.• If motor unit doesn't operate, motor unit is overheated. Wait 30 minutes andretry. If motor unit still will not operate replace logic board.

If it went all the way down, then "bounced" and went all the way back up, it's not the sensors. You need to check your limits. For some reason the door is going past the limits then the force is telling it that it is pushing too hard so it runs back up when it hits the ground. Clean your eye beams and the bottom of the door (some times leaves will stick and cross the eyebeam as it gets almost closed) just to make sure, but I would try resetting the limits or verify the limit switches are not broke, which can sometimes happen.

Because you plugged it in and wired it properly.

Because you have power to it! If properly aligned, the other one will be green.

Someone may have the same frequency in the neighbourhood.

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.

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

Look at the opener to see if you can see the small wire dangling form it. That is the antenna. Stretch it out and point it down for maximum range.

not sure, but see the users manual here:http://www.manualslib.com/manual/32293/Craftsman-139-5399.html

press the learn button on the motor, then you have 30 seconds to set the button you wish on the remote. make sure to do it within 30 seconds

there is a problem with the sensor, when you let go of the button it thinks something is obstructing the path

there is a problem with the sensor

does the door open and close?

Control board has thermal issue. Bad solder joint that contracts when cold could be the culprit. Take out board and carefully resolder every ****** connection on board.

You have a gear kit broke.