An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: Door won't open
I don't know about the ground sensors, I do know they are a safety feature so it won't come down on something if the eyes are blocked. Try replacing the bad "eye"
For the buzzing noise, check the capacitor to see if it has blown out and requires replacement. To test this, you should be able to disconnect the door, open it manually, reconnect the door to the carriage assembly, and close the door using the GDO. The capacitor is only used to give the machine enough power to initially lift the door. It does not use the capacitor to close. Other signs to a blown capacitor is white secretion physically coming out of the capacitor. Get the MFD (microfarad) number range off the capacitor and the voltage (usually 220 volts, possiblye 330.) and find a replacement capacitor for the brand of your opener.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
check all wired connections, check all wires to insure no nail or staples have nicked them. check troubleshooting section of manual for codes possible circuit board. it is either a liftmaster or genie sold under the craftsman name
Check the door sensors. Make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.
What it is is the electric beams at the door are getting blinded buy the sun or out of line. They are the two black boxes on both sides of the door about a foot from the ground. Put a piece of card board in front of them not blocking the beam dut to block the sun. All that they are is safety beams for kids so they do not get hurt. If you have to move them to the top where the sun will not hit them. Sorry to say though you can not remove them all the way. Also make sure the lite on them is not blinking if so they are out of line.
TRY RESETTING THE UNIT BY UNPLUGGING IT FOR ABOUT 5 MIN.
IF WHEN YOU PLUG IT IN THE REMOTES STILL DON'T WORK TRY TO REPROGRAM THEM.
IF STILL HAVING TROUBLE--
COUNT THE FLASHES - GOTO LIFTMASTER.COM DOWNLOAD A FREE PDF FOR A SIMILAR UNIT (THE MODEL NUMBERS ARE DIFFERENT BUT THE CODES ARE THE SAME).
HOPE THIS HELPS
Anytime a door opens and/or closes randomly or doesn’t work consistently I look for a smashed wire between the motor unit and the wall button.
If the wire is smashed the insulation becomes so thin that power will leak thru the insulation and activate the door or interfere with the remote signal.
Loosen the staples with a small screwdriver and slide the wire about ½ inch to move any areas of thin insulation away from the staples.
The second thing would be a bad wall button or a remote with a sticking button.
Or a remote in someone’s purse that gets the button pushed by other stuff in the purse.
The test is to disconnect the push button wires at the power unit. If the self operation / interference stops you have located the problem. If you reconnect the wires and disconnect the wire at the wall button this will tell you if the problem is the wire or the button.
In your case the expansion of the wall in the afternoon may be enough to cause pressure on the wire to increase the problem – works in the morning but not the afternoon.
Also after you change the batteries you need to reprogram the remotes.