Liftmaster Professional 1 2 Hp Garage Door Opener Troubleshooting

If the garage door connected to your liftmaster opener only opens part of the way or it begins to open but then reverses check the track and the surrounding area for any objects that may obstruct.

Liftmaster professional 1 2 hp garage door opener troubleshooting. Troubleshooting a liftmaster opener with a flashing light involves inspection of the safety reverse sensing system. Liftmaster motors will not operate when something obstructs the infrared beam between the safety sensors at the bottom of the garage door tracks. Liftmaster garage door openers troubleshooting support. Disconnect all wires from back of garage door opener.

The liftmaster contractor series comes with a wide range of 1 2 hp garage door openers. Get the liftmaster garage door support you need from chamberlain group. If you see a blinking light on one of the sensors it means they aren t aligned. Learn more about how they provide power dependability performance.

Here are some troubleshooting tips. Check power supply to garage door opener. 30 60 cm from back each of sensor. When your garage door opener is not responding to any command from the remote or the door control you need to check if the opener has electricity.

Another reason for the sensors to misalign is that the door track is loose. Remove sensors from brackets and shorten sensor wires to 1 2 ft. Motor unit assembly parts rail assembly parts and installation parts for liftmaster belt drive garage door opener models 8550 8550w 8550wl 8550wlb liftmaster 821lmc owner s manual spanish liftmaster 821lmc owner s manual french. Reattach sending sensor to garage door opener using shortened wires.

Whether you have a belt drive chain drive or wall mount model find helpful resources manuals videos and more to help you diagnose and fix the problem. If sending sensor indicator light glows steadily attach the receiving sensor. Loosen one of them and adjust it until the light shines steadily. If you tried operating your liftmaster garage door opener with the remote control or door control and it didn t work.

An open door will not close if the infrared beam is broken. We design and engineer residential garage door openers commercial door operators and gate entry systems.