I have tried all programmed remotes with the same outcome. Have tried the wall mounted pad with the same outcome. I switched to manual operation, open the door, closed the door all with the same results. There is no obstruction and the door operates easily in manual mode.
Try to recode the remote opener.
The same happens when you press the learn button, thus I cannot reprogram a remote receiver
Tried pressing the run button on the motor itself with the same results
The manual states the 3 flashes indicate an imbalanced condition and you should have a qualified technician look at this. Working on a garage door can be hazardous and you could be severely injured if you attempt to work on it without knowing how to deal with the considerable amount of spring tension that is present in a garage door mechanism.
You can find the manual here:https://www.google.com/url?sa=t&rct=j&q=...
or by searching for
centurion xtrac garage door motor manual
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SOURCE: Lift-Master garage door opener Model 1045-6 1/3 hp
There is a thermal cut out in the motor, usually the motor must cool before the opener will operate again. If the opener only operates 3 times it must be heating up too quickly.
First you opener is only made to do your job for you, which is opening and closing the door. If the door does not operate properly manually the opener will not operate properly.
When the door is disconnected from the opener it should lift easilly, it should basically stay at whatever point you let go of it (midway and fully open) and it should close without slamming down. It does not matter what size the door is!!! If it does not something is wrong with your springs and the door can be VERY DANGEROUS!!
With that being said it sounds more like a static lock-up possibly a loose ground or even a circuit problem in the home.
Bryan
SOURCE: Chamberlain Liftmaster Pro. Garage door Problems closing
The sensor eye - or more likely, the other end, the sensor light - probably got knocked out of alignment. The eye should have an LED on it - possibly one that glows green when it's ready to close or red when it's obstructed or out of alignment. Try adjusting the light until the LED on the receiver glows green.
SOURCE: Remote will not operate garage door opener from outside garage
Will the remotes work in the garage? If yes but not outside with the door closed you might have radio interferace with your remotes. You might have to chage to a your reciever and remotes to a different brand (frequency). Sometimes it is less trouble to change out the operator. Chamerlain changed frequency from 390 (old) to 315 (new).
SOURCE: Sear garage door wall mount contol light keeps blinking
Hold the button with the lock icon in for 3 seconds. This should toggle the unit off vacation mode and your remotes will work.
SOURCE: Hi, I have a Lynx 455
Check the sensors in the doorway. Sounds like they may be misaligned. They need to be pointing at one another to work properly.
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