liftmaster Recent Questions, Troubleshooting Help & Support

Check the light sockets on either side of the garage door opener and make sure there is no corrosion on the contacts. If you see some corrosion unplug the garage door opener and scrape off the contact. Give that a try and lets see what happens.

Your answer is in the last line, unless you have those lights, the opener assumes something is in the way. Make sure you have the green one pointing in the direction of the local sunsets as this is also a problem certain days of the year.

Fool with the down and up force adjustments on the back of the opener.

CHECK TO SEE IF THE LED ON THE WALL BUTTON IS BLINKING - IF IT IS SOMEONE HAS PUSHED THE VACATION LOCK BUTTON.
PRESS THE LOCK BUTTON TO MAKE THE LED STAY CONSTANT AND IT IS FIXED.
HOPE THIS HELPS

this is likely a force setting issue, with all the humidity the door might be getting more stiff, on the back or side of the unit there should be a screw it adjust, or you can reference the manual, but before doing so you should release the door from the opener (handle on the trolley) and check to see just how stiff the door is, if the spring has broken you will have to get a door guy to fix it.

I would replace the battery anyway. Even with no use batteries drain over time. That's the easiest troubleshooting step and more than likely the problem. Once that's eliminated we can try harder solutions.

try leaving bulbs out a bad socket can cause range issues. also a bad ground on the wall/ceiling outlet can also cause problems.

Thayst a logic board #.. What model # is the operater.. 8165 8500 8550 etc??

Hi,
There is a rope or string hanging down that releases the dog that hooks the door to the chain...if someone pulled that the door will not open. You need to pull down and back on the srting to relaese the dog and then push the door up to catch the chain...then the door will work again...

heatman101

One should be green and the other amber - The amber one stay on all the time, the green one tells if the alignment is OK or not (solid green means OK) Hope this helps, if it does please click 'helpful below'

No the yellow or amber light is the sending eye and the green is the receiver.

This will happen if the IR sensor are sensing an obstruction while the door is closing OR if the IR sensors are defective. As a first option, check to see if any object is stuck to the door (possibly low down) that is triggering the IR sensor. Hope this is helpful, if it was please click the 'Helpful' button below. Good luck

They are not light weight but there is no reason if the motor can raise it, then you cannot raise it by hand.

If your garage door is up, and you break the beam (by walking through it, for example), you will get the "SENSOR WIRING INTERMITTENT CONNECTION ERROR CODE 1-4 SEE USER MANUAL". This is normal. Both of my Liftmaster 8550 openers do this. It's misleading, but this is what I've found to cause this error.