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
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29 years is along run on an opener. Personally I would replace it and not spend any money trying to repair it. You can try and find a control panel, or buy a new opener for $200.00 at HD. you can leave track in place replace rollers from new opener box.
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.
It is probably the lubrication in the rollers. You should lubricate them and make a small adjustment to the torque sensor. When it gets cold the lub gets stiff. The torque sensor will detect this and open the door, a safe position.
Hello, Jamesgeorge8 -
The sensors for the garage door opener may not be properly aligned or there may be dust and or cobwebs blocking the sensors from interacting with each other.
The sensor alignment problem was the issue with our garage door opener. My husband tried to "futz with" the sensors with no luck. So, we finally called the garage door repair card (the previous resident of the home left the business card for the garage door repair company slipped behind the power button inside the garage) and he came and fixed the problem (for a price) quickly.
You may find information from the San Francisco Examiner (newspaper) helpful. This is the link:
http://homeguides.sfgate.com/fixing-sensor-overhead-garage-doors-39383.html
This is an instructive video on how to replace garage door sensors I found on YouTube:
https://www.youtube.com/watch?v=crTTxmUm6Vo
You will see links to similar instructive YouTube videos along the right side bar.
Best wishes.
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.
This sounds like a similar problem that I had. The circuit board on the garage door motor has a capacitor that goes bad and this prevents the remotes from working. You can either buy a replacement circuit board online (for around $80 if I remember) or if you can solder, simply replace the capacitor for a few dollars. I answered a similar question on this site before after I went through the process. There are more details there. The capacitor in question was close to a heat producing component and over time it cooks.
Check alignment of the obstruction sensors .... they shoot a light beam across the doorway about 6 inches above the floor. One is mounted on each side of the door track near the floor.
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
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Try this first before calling a repair company. When the door is finished moving and it is open release the handle that disengages the door from the actuator and then close the door by hand. then re engage the handle and operate the door. If everything works fine after that, there is no need to call for a repair.
It will only take a 4 digit program code. After you program the code, and then enter that code to open the door, hit an additional number on the keypad. Some need the additional digit to act like an 'enter' key.
