If your kids are big enough to shovel snow, they’re big enough to help change out the GDO. Mine has two coil springs near the top center of the door. I installed a Genie garage door about a year or two ago. The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor. Copyright© The door opener doesn’t inherently know when to stop going up or down - you have to adjust those screws so that it stops at the places you want it to. Fix: Replace the main gear drive. I reattached the door, and the opener was able to close the door. I have 3-in-1 oil, but I’m not sure where in particular to use it. It had the same symptoms that would allow it to open the door a foot and then stop, with the motor obviously still turning. If your door opener coughs and sputters, it is time to replace the motor. Next to that screw are two adjusting screws that are used to stop the motor after it makes electrical contact with the traveling thingy. My Craftsman opener of about the same vintage failed a few years ago, also during a cold snap that had caused some ice buildup. I had its spring replaced about 4 years ago. You’ll probably need the door down to see them. The main drive gear is the most common component to fail on most openers...The gear alone should cost you less than $20. problems contact webmaster@doityourself.com. It’s also good to oil the joints in the door itself, but your opener won’t hoist at all, so that’s not your problem. Sell parts? suggestions. A lot of that time is just unhooking the system from the door so you an work on it. Its a DIY job, since the wiring is all in place, and the weight is not too much (if it was a roller door, the doors has its weight on the lifter… but when its a door puller , it doesn’t have that weight ) Our garage door opener just began making a loud grinding noise, and wouldn’t lift the door. On some systems, the garage door opener installed on the wall will override commands from the remote control opener, and the system must be unlocked from the wall pad. The remotes are smaller and use secure signals. When I pulled the motor cover, plastic filings were everywhere. it seemed the noise got a little lower. I opened up the door opener, and the main gear and screw gear both look OK. Do a Google search, to find for example: If not addressed your  door opener will eventually quit on you. to this site, and use it for non-commercial use subject to our terms of use. It’s a two-car garage. All Content. http://www.searspartsdirect.com/partsdirect/brands-products/Craftsman-Parts/Garage-door-opener-Parts. If pretty hard, check that the springs are not broken. If I run the opener with the door not attached, it will go up and down, and make the grinding noise. I was able to buy the complete kit with both gears and bushings for about $17, but I didn’t use anything from the kit except the main gear and the grease. I could get the model number, but it doesn’t seem to have broken parts. If any of the springs are not working, then it makes the motor work much harder. You’ll need to find the manual for it here and determine what type of chain you will need and search for it here. All information is provided "AS IS." Find the Chamberlain garage door opener technical support you need to help fix any issues you may be having with your garage door opener and parts. The main gear could have been purchased for about $5. Mine has both of these. For a few days, it might drip some black stuff on the garage floor, and you don’t want to track that inside. Out the gear probably break a gear tooth or something be for down to see them information need. Can advise you on taking a link or two out help you keep your door may. 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