liftmaster Building Materials - Popular Questions, Answers, Tips & Manuals

Question edited for a lot more clarity. Question moved form Cars and Trucks category. The part number you stated is the logic board on a Liftmaster Garage Door Opener. No, the cable is supposed to spiral wound around that pulley. It is connected to the spring which takes the weight of the door. You need the model number to find the manual. https://www.google.com/search?q=part+%23+41a5021-d ..

Sounds like the transformer is bad, if it is not the transformer then one of the voltage regulators is burned out. The system is designed for 12 or 24 volts.

https://support.chamberlaingroup.com/s/article/Why-does-the-LED-or-Screen-flash-on-my-door-control-1484145657103

Depending on the model the travel needs to adjusted, some models have a force adjustment. Call LF customer service the will help you.

If these problems started immediately after a lightning storm, the printed circuit board is probably damaged. Contact a garage door service company (check the phonebook) for diagnostic support.

Here you go... http://www.skylinkstore.com/docs/manuals/ut/mS89ENEWpdf.pdf

Recategorised from Vacuum cleaners to 'at least' a Garage Door Opener category. This unit is only available in South Africa, and we are a North American website which is probably why help was not forthcoming in 2017.. There is some general help here though for setting travel limits. https://www.google.com/search?q=coromaster+2000+has+lost+its+limits ..

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

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

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.

Garage Door Opener Troubleshooting step by step This video may assist you

internal drive gears are going. take cover off and take a look

first, hold the wall button down and do not let up and the door will close for you. second, one of the wires to your sensors is loose, broken or shorted out by a staple thru the insulation. you can bypass the sensors on a temporary basis while you find the issue, by jumping the sensor connections at the motor.

If you constantly hold the button down it will close. However, the sensor circuit for closing the door is either unconnected (check the connection of the two wires going to the sending/receiving units on bottom of garage door for proper connection and aiming) or the circuit itself has gone south.

Sounds like the opener has opened to far and the trolley is now jammed against the stop bolt.

check all wires,someone may have cut them to break in

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.

Gear kits can be purchased for chain drive machines from any of these 3 brand names ...Liftmaster/sears craftsman /chamberlain / All 3 of these brand names are manufactured by Liftmaster the worlds largest maker of garage door openers and related parts ! You can purchase a gear kit on ebay for around $30 or less depending on the seller ! If you go to garage door parts sites it will be slightly higher so your best bet is EBAY , The gear kit only requires the main gear and sprocket housing that attaches with 3 screws , just remember after the gear is installed that you run the motor co that the trolley starts in the door down position otherwise you risk having the trolley smack into the opener , this is crucial for any travel adjustments that are made later! Hope this helps you ,sincerely Glenn