Top 20 liftmaster Garage Door 1/2 Hp Questions & Answers

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 ..

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.

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??

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.

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

colder weather solidifies the grease to add extra friction on the moving door in the track. Increase the downward close pressure. Its a screw on the motor box. There are 2 sets of screws one for open and close pressure the other set for close and open distance

Verify you have power at the opener. If the lights flash upon close - you are good. Next, make sure the photoeyes are aligned properly. the master photoeye will always have power. The second will light up when it sees the master unit. If they are aligned, replace them (they do fail). You can also temproarily jumper the wires at the opener to see if the door operates. This will confirm a bad sensor.

good photo, you can tr to replace the starter solenoid, check all wiring and connections, safeteys etc.

See if it will work using the wall switch if it does then try reprogramming your remotes. If nothing works then you probably have a blown circuit board.

The Liftmaster openers have 4 movement switches, a )opening and b) closing limit and c) opening and d) closing force. First check the door for smooth operation by opening the door by hand (disconnect from the opener with the release cord). Any binding should be felt this way. It is possible for a binding hinge, roller or torsion springs to add too much drag and cause the force switch to shut off the motor. Hinges, roller shafts and torsion springs should be lubricated at least annually with a non oily spray (silicone or teflon spray). Not WD-40 or 3-in-1! A light band of lube should be applied to the torsion spring coils. If the door can be operated smoothly by hand, then adjust the closing force switch 1/4 turn at a time. This is a safety device do not use it to overcome another problem!

The problem is with the infrared sensor cameras! You must check to see that both cameras have their led lights lit, if not you can position the one that does not have its light on which is called the receiver , The receiver receives a signal from the sending infrared camera and if it is not positioned correctly it will not receive a signal forcing you to hold down the wall station button . The reason for this is a built in security feature letting you know the sensors are not aimed at each other properly ,once you have an indicator light on both sides your opener should work fine and you wont have to stand their holding the button until the door closes ...Hope this helps you , good luck Glenn

Sometimes the led goes bad but you can still program. If this is not the case the circuit board is bad