Garage door openers and equipment - http://a1garagedooropeners.com

How To Fix A Craftsman Garage




How To Fix A Craftsman Garage Door Opener - Bookshelf


572 pages

2006 National Renovation & Insurance Repair Estimator

Creator: Jonathan Russell | 2005-10-01

Jonathan Russell «i Insurance Repair Estimator DOORS - It. Item Description Unit Remove Replace Total Garage door opener, high grade i ea $22.20 $463.00 $485.20 RELATED ITEMS \ Replate Materials ....356.00 Lobor 107.00 : Remove ...

Publisher: Craftsman Book Co



339 pages

Residential Wiring To The 2005 NEC

Creator: Jeff Markell | 2004-12-01

This applies to four or more fixed appliances. In this house there are: Water heater 3200 W Disposal 764 W Dishwasher 1000 W Garage door opener 720 W Total 5684 W 75% of 5684 W 4263 W Fixed Electric Space Heating, Air Conditioning ...

About this book
This book explains what every electrician needs to know about electricity - how to select the right materials, how to follow floor plans, types and spacing of outlets, and permissible loading on general purpose circuits. Residential Wiring to the 2005 NEC is the complete guide for your electrical contractor customers for installing residential wiring to the 2005 NEW - from the tools and gauges needed, through switch circuits, service entrances, additions and alterations, troubleshooting, and repairs.



100 pages

Popular Science

1991-07

Non-contact garage-door openers are available as an option from Chamberlain, Craftsman, Genie, and Stanley. ... precious water around homes as well — and minimize the need to excavate and repair yards when searching for pipe breaks.

About this book
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.


Garage openers Directory

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HowStuffWorks "How to Repair a Garage Door: Tips and ...
There are two main components to a garage door: the garage door itself and the garage door opener. Learn how to repair a garage door.

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If a garage door opener isn't working, check the remote control's battery and check the sensors on the opener itself. Stop a garage door from getting jammed with help ...


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Garage openers

Editor's picks

  • Chamberlain

    Chamberlain LiftMaster Sears Craftsman 41C4220A Gear & Sprocket Assembly Kit

    Home Improvement (Chamberlain)

    Rating (929 reviews):
    (4.8/5)
    Chamberlain

    Great Product; Relatively Easy Installation

    I benefited greatly from comments others made about this product and how to install it, and I thought I'd add mine for any who are looking at getting this. My 11-year-old Liftmaster chain drive garage door opener stopped working and had the same worn out sprocket that so many have described, with the white snow shavings, etc. I too feared I'd have to spend $100s getting it fixed, then I found this great product on Amazon. I installed it last night, the whole process, including finding tools and adjusting the chain and door afterward, took me about 2.5 hours, but the actual removal and installation of the part took only about an hour. Garage door works great now, and is quieter than before.For the installation, I did what the reviewer before me did, which means I didn't remove all of the stuff the instructions said to remove. Here's a fairly detailed step-by-step of what I did -- my inner and outer "trolleys" (the things that slide the door along the rail and that have... 5/5 bantcher - See all my reviews Verified Purchase(What's this?) This review is from: Chamberlain LiftMaster Sears Craftsman 41C4220A Gear & Sprocket Assembly Kit I benefited greatly from comments others made about this product and how to install it, and I thought I'd add mine for any who are looking at getting this. My 11-year-old Liftmaster chain drive garage door opener stopped working and had the same worn out sprocket that so many have described, with the white snow shavings, etc. I too feared I'd have to spend $100s getting it fixed, then I found this great product on Amazon. I installed it last night, the whole process, including finding tools and adjusting the chain and door afterward, took me about 2.5 hours, but the actual removal and installation of the part took only about an hour. Garage door works great now, and is quieter than before.For the installation, I did what the reviewer before me did, which means I didn't remove all of the stuff the instructions said to remove. Here's a fairly detailed step-by-step of what I did -- my inner and outer "trolleys" (the things that slide the door along the rail and that have... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , October 20, 2009

    Works like a charm, but what a lot of work it is.......

    First, I wanted to offer compliments to other reviewers that described the symptoms of the gears being bad - the "snow", the stop-and-starts, the stop working altogether but can still hear the motor running - nailed it exactly. Very clear to me after reading those that this was exactly the product I needed. It is exactly what it says it is - an OEM Liftmaster gear replacement assembly. The directions that come with it are excellent - step-by-step, and it explains exactly what you need to do. The directions are the best part of this product - if they were not so well done, it would be impossible.No knock against the product, but installation was considerably more work than I expected. I had visions of undoing a couple of screws, popping out a gear, putting in the new ones, and being done - boy, I couldn't have been more wrong. The process can best be summarized as "take your garage door opener completely apart, removing all pieces, wires, etc. Around 30 to 50 screws,... 5/5 Kentucky Reviewer (Louisville, KY) - See all my reviews Verified Purchase(What's this?) This review is from: Chamberlain LiftMaster Sears Craftsman 41C4220A Gear & Sprocket Assembly Kit First, I wanted to offer compliments to other reviewers that described the symptoms of the gears being bad - the "snow", the stop-and-starts, the stop working altogether but can still hear the motor running - nailed it exactly. Very clear to me after reading those that this was exactly the product I needed. It is exactly what it says it is - an OEM Liftmaster gear replacement assembly. The directions that come with it are excellent - step-by-step, and it explains exactly what you need to do. The directions are the best part of this product - if they were not so well done, it would be impossible.No knock against the product, but installation was considerably more work than I expected. I had visions of undoing a couple of screws, popping out a gear, putting in the new ones, and being done - boy, I couldn't have been more wrong. The process can best be summarized as "take your garage door opener completely apart, removing all pieces, wires, etc. Around 30 to 50 screws,... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , February 23, 2008

    Worked! Here are a few tips.

    This is one of those time consuming jobs with little annoying issues. Here are my tips so hopefully you can avoid the problems I had, making your job much faster than mine was. The sprocket on the top of my unit broke so I just had to replace the drive gear and shaft. No other parts were worn or damaged so I didn't bother with them. The annoying part is that you unscrew the screws on the shaft plate from the inside of the unit and there isn't alot of room for your hand motion. I used the smallest ratchet in my set. A couple things to be aware of during this step is that you can remove the back panel with the circuit board by unplugging the circuit board. It has a multi-pin plug that is very similar to computer drive plugs. Also, I recommend wearing mechanics gloves b/c the unit is made from stamped metal so there are lots of sharp edges and corners which easily cut up your knucles and scrape fingers. One other problem I had was with my chain. Since the sprocket broke the... 4/5 BTM (Jeffersonville, IN) - See all my reviews Verified Purchase(What's this?) This is one of those time consuming jobs with little annoying issues. Here are my tips so hopefully you can avoid the problems I had, making your job much faster than mine was. The sprocket on the top of my unit broke so I just had to replace the drive gear and shaft. No other parts were worn or damaged so I didn't bother with them. The annoying part is that you unscrew the screws on the shaft plate from the inside of the unit and there isn't alot of room for your hand motion. I used the smallest ratchet in my set. A couple things to be aware of during this step is that you can remove the back panel with the circuit board by unplugging the circuit board. It has a multi-pin plug that is very similar to computer drive plugs. Also, I recommend wearing mechanics gloves b/c the unit is made from stamped metal so there are lots of sharp edges and corners which easily cut up your knucles and scrape fingers. One other problem I had was with my chain. Since the sprocket broke the... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , June 6, 2011
    List Price: $39.99
    Price: $18.74
    You Save: $21.25 (53%)
    Includes: Gear and Sprocket, Worm Gear, Grease, Motor Shaft Bearings, Sprocket Bearings,Instructions
    Compatible with CHAIN Drive Chamberlain Sears Craftsman Manufactured operators 1984-current


  • LIFTMASTER

    Chamberlain Garage Door Opener Gear Kit - Part #41A2817

    Home Improvement (LIFTMASTER)

    Rating (309 reviews):
    (4.7/5)
    LIFTMASTER

    With this kit and a little time, you can repair your garage door opener.

    I was faced with the decision to purchase a new garage door opener for about $230 or repair the existing opener from 1992 which lacks some of today's safety features. Since I don't use this garage door often and I don't have children, I opted to save some cash and do the repair myself. I have no previous experience of doing these types of garage door opener repairs, but as a do-it-yourselfer I figured it was worth the attempt.The kit came with detailed instructions which broke the process down into 5 main steps each with multiple individual tasks. The instructions were not exact for my opener, but were close enough to get the point. The steps start with removing the motor with the worm, removing the chain stem with the gear, replacing the worm, replacing the gear, and finally reassembling everything. Once the first two steps were completed I brought the parts inside to work on. I had the most trouble removing the tightly set pin to replace the gear. About two hours... 5/5 L. T. Beasimer "www.LBphoto.net" (Dallas, TX) - See all my reviews, March 22, 2008

    Not for the faint of heart....

    This was a lot of work, more than I had anticipated, despite the excellent reviews here, warning of the many nuts, plugs, and pins involved.The directions were so-so. I found that they were written very generically with the intent to apply to variations of the models. The diagrams could have been more clear...for example, I had trouble figuring out where the retainer clip and limit drive gear (2A) was. It's the white thing on the end of the sprocket assembly shaft. My advice is to take your time and move very slowly through the instructions, step by step. There were a few things that delayed me:* The sprocket assembly had to be lifted up through the hole in the chassis, and I only had 2 inches of clearance between the top of the opener and the ceiling of the garage. This meant that the opener had to come down a few inches. I suspended it with rope and bungees since taking it down completely would have meant un-bolting it from the chain axel, and I didn't... 5/5 Spumanti (Mountain View, CA United States) - See all my reviews This review is from: Chamberlain Garage Door Opener Gear Kit - Part #41A2817 This was a lot of work, more than I had anticipated, despite the excellent reviews here, warning of the many nuts, plugs, and pins involved.The directions were so-so. I found that they were written very generically with the intent to apply to variations of the models. The diagrams could have been more clear...for example, I had trouble figuring out where the retainer clip and limit drive gear (2A) was. It's the white thing on the end of the sprocket assembly shaft. My advice is to take your time and move very slowly through the instructions, step by step. There were a few things that delayed me:* The sprocket assembly had to be lifted up through the hole in the chassis, and I only had 2 inches of clearance between the top of the opener and the ceiling of the garage. This meant that the opener had to come down a few inches. I suspended it with rope and bungees since taking it down completely would have meant un-bolting it from the chain axel, and I didn't... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , February 24, 2009

    A replacement part - with instructions!

    0 5/5 J. Fritz "Jack-of-all-trades" (St. Louis, MO) - See all my reviews, January 11, 2007
    Craftsman
    Liftmaster 41A2817 Drive Gear Replacement Kit
    Sears
    Chamberlain


  • Chamberlain

    LIFTMASTER Garage Door Openers 41A4373A Safety Sensors

    Home Improvement (Chamberlain)

    Rating (403 reviews):
    (4.8/5)
    Chamberlain

    Simple to install

    0 5/5 L. T. Beasimer "www.LBphoto.net" (Dallas, TX) - See all my reviews, March 16, 2008

    Craftsman 1/2 HP Opener 1995

    Our Craftsman 1/2 HP garage door opener ('95 model) acted up whenever it got cold and had been progressively getting worst. After researching the problem (spring tension, up/down force setting, alignment of sensors) it was finally determined that the sensors themselves had become defective.This is due to the cold weather affecting the capacitor in the sensor. Each sensor has a capacitor on its printed circuit board. Each circuit board has two electrolytic capacitors. One is 470uf at 16 volts. The other is 1uf at 50 volts. The cold increases conductivity and reduces the resistance of the insulation material in the capacitor. Age of the insulation material also degrades. This in turn impacts the completion of the circuit being created by the electronic sensor eyes at the garage door opener itself. (yes, too much info here but I wracked my brains out trying to figure out the WHY instead of just replacing the sensors)The replacement sensors are a perfect fit... 5/5 R.L. (USA) - See all my reviews Verified Purchase(What's this?) This review is from: LIFTMASTER Garage Door Openers 41A4373A Safety Sensors (Electronics) Our Craftsman 1/2 HP garage door opener ('95 model) acted up whenever it got cold and had been progressively getting worst. After researching the problem (spring tension, up/down force setting, alignment of sensors) it was finally determined that the sensors themselves had become defective.This is due to the cold weather affecting the capacitor in the sensor. Each sensor has a capacitor on its printed circuit board. Each circuit board has two electrolytic capacitors. One is 470uf at 16 volts. The other is 1uf at 50 volts. The cold increases conductivity and reduces the resistance of the insulation material in the capacitor. Age of the insulation material also degrades. This in turn impacts the completion of the circuit being created by the electronic sensor eyes at the garage door opener itself. (yes, too much info here but I wracked my brains out trying to figure out the WHY instead of just replacing the sensors)The replacement sensors are a perfect fit... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , January 13, 2013

    It fixed my problem!

    My receiving eye LED light was very dim and would go completely off when it got really cold down here in S. Florida, Broward Co. 12/27/10 (36 degrees!)So what would happen is when I would go to press the wall button to have the garage door go down, it would go down for like 7" then automatically go back up on it's own - and the light would blink 10 times.So I bought the two replacements, (comes in a kit, with both) that were exact to the original model numbers...1) I only replaced the receiving eye and the LED light wasn't as bright as the sending eye - and I still had the same problem.2) I then replaced the sending eye and adjusted them so they can "see" each other, Everything Works Perfect NOW!!!For me at least - adjusting them was a little tricky, because they are very touchy and must be aligned perfectly.Just make sure the receiving eye LED light is not fluttering or blinking really fast, because it won't work... 5/5 ProFlex (Firenze, Italia) - See all my reviews Verified Purchase(What's this?) This review is from: LIFTMASTER Garage Door Openers 41A4373A Safety Sensors (Electronics) My receiving eye LED light was very dim and would go completely off when it got really cold down here in S. Florida, Broward Co. 12/27/10 (36 degrees!)So what would happen is when I would go to press the wall button to have the garage door go down, it would go down for like 7" then automatically go back up on it's own - and the light would blink 10 times.So I bought the two replacements, (comes in a kit, with both) that were exact to the original model numbers...1) I only replaced the receiving eye and the LED light wasn't as bright as the sending eye - and I still had the same problem.2) I then replaced the sending eye and adjusted them so they can "see" each other, Everything Works Perfect NOW!!!For me at least - adjusting them was a little tricky, because they are very touchy and must be aligned perfectly.Just make sure the receiving eye LED light is not fluttering or blinking really fast, because it won't work... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , December 29, 2010
    List Price: $41.40
    Price: $15.29
    You Save: $26.11 (63%)
    Compatible with LiftMaster and Chamberlain Brand garage door openers 1993 thru 1997. Includes sensors only - no brackets.
    Sensors measure 3" L x 1 1/2" W
    Each sensors has a green light and a bolt hole that runs right through the center of it.
    Each sensor shown includes approximately 18" of wire attached.  Designed to splice into your existing wires.  Wire connectors included.


  • Sears Craftsman

    Sears Craftsman LiftMaster Chamberlain Light Socket Part # 41A1344

    Home Improvement (Sears Craftsman)

    Rating (57 reviews):
    (4.5/5)
    Sears Craftsman

    One was great. The second faulty

    I had two garages that needed to have these replaced. I bought one. I was going to buy two but because they don't give you break on shipping for more than one I figured I'd order them separately just to make sure that was the issue. The first one worked great. It was easy to replace and immediately fixed the problem. I tried it in both my garages and it worked in each so I went ahead and ordered a second. The second one wouldn't work in either garage which was frustrating. I contacted the company who informed me I would need to ship it back at my expense and if they determined it was faulty they would replace it. Really? What kind of customer service is that? I realize there are people out there that are dishonest but over a $3 part? Just the effort to make a special trip to the post office wasn't worth it to me. They had every reason to believe me as I had already purchased one that worked like a charm. In any event don't expect the product to work or for the company to... 1/5 Jeff Stubbs (Utah) - See all my reviews, October 28, 2013

    Good light socket, but watch out for white color!

    0 4/5 Kanaan (Orange County, CA USA) - See all my reviews Verified Purchase(What's this?) This review is from: Sears Craftsman LiftMaster Chamberlain Light Socket Part # 41A1344 (Misc.) This socket worked perfectly in our Liftmaster unit where the sockets had burnt out. As some previous reviewers mentioned I was shipped white also - the color does not match photo on the product page (so removed 1 star). Was in a hurry to get our lights working - so just used white on black and its within the outer white bulb covers.Replacing is very easy - Disconnect power cord, remove 3 screws on each side - pop out old socket after removing wires - pop in the new socket (no screws needed) - connect wires and put back the 3 screws. More instructions are available on Chamberlain website. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , November 7, 2013

    Good value

    0 5/5 Bill - See all my reviews Verified Purchase(What's this?) This review is from: Sears Craftsman LiftMaster Chamberlain Light Socket Part # 41A1344 (Misc.) Price was reasonable - the part was just as described - installation was quick and easy. Would recommend this to any DIY. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 4, 2013
    Replacement light socket for Liftmaster chain drive and belt drive operators
    Compatible with models manufactured from 1984 to current


  • Chamberlain

    Liftmaster 41C4398A RPM Sensor Assembly

    Home Improvement (Chamberlain)

    Rating (43 reviews):
    (4.5/5)
    Chamberlain

    TRY THIS BEFORE YOU BUY IT

    FYI: You may not need to buy this at all - you might be able to solve your problem by trying this...HOW IT WORKS: This is simply a sensor module that consists of an LED that shines a small beam of infrared light across a small gap to a phototransistor (the module is the black object on the circuit board). The fins on the plastic pinwheel interrupt that beam of light as it spins on the motor shaft. That generates pulses that tell the control board that the motor is spinning. Since these kind of modules virtually never fail, it is likely that the pinwheel has slid out of alignment with the sensor. Make sure the 5 flaps on the wheel penetrate around 1/4 to 3/8" into the gap of the sensor - without hitting anything of course. This can be accomplished by sliding the pinwheel on the shaft closer to the motor. It may take a small amount of gentle force to slide it, but that should fix the 6-8 second run / stop / reverse symptom. You can ignore the 2 stars - I had to click on... 2/5 William R. Vincent "Mr Hytech" (Scituate, RI USA) - See all my reviews, December 4, 2013

    saved me $91. yay!

    so, i have a 1/2 hp craftsman garage door that worked for everyone with no problems except me. Every time i was trying to close it, it would start closing and after 8-10" of travel, it would go back up and start clicking. I'd try it again and it would do the same - start to close, then stop and go back up, and clicks...so, i called a garage door repair dude, he came over and said "it's the RMP sensor". I will fix it for $100. let me know when you want to do it".His mistake was to tell a guy who is really handy what is causing the problem. I came on amazon, purchased the RPM sensor, took the cover off, unplugged the old sensor, plugged the new sensor and the door works like a charm right now. his price - $100. my cost - $8.99 + S&H + 15 mins of labor. the 500 screws that were holding the cover took more time than the actual repair.apparently liftmaster makes the RPM sensors for craftsman. in fact, craftsman is exactly the same product as lift master... 5/5 Homer Jay Simpson "Homer J." (Springfield) - See all my reviews Verified Purchase(What's this?) This review is from: Liftmaster 41C4398A RPM Sensor Assembly (Tools & Home Improvement) so, i have a 1/2 hp craftsman garage door that worked for everyone with no problems except me. Every time i was trying to close it, it would start closing and after 8-10" of travel, it would go back up and start clicking. I'd try it again and it would do the same - start to close, then stop and go back up, and clicks...so, i called a garage door repair dude, he came over and said "it's the RMP sensor". I will fix it for $100. let me know when you want to do it".His mistake was to tell a guy who is really handy what is causing the problem. I came on amazon, purchased the RPM sensor, took the cover off, unplugged the old sensor, plugged the new sensor and the door works like a charm right now. his price - $100. my cost - $8.99 + S&H + 15 mins of labor. the 500 screws that were holding the cover took more time than the actual repair.apparently liftmaster makes the RPM sensors for craftsman. in fact, craftsman is exactly the same product as lift master... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , September 11, 2011

    Perfect replacement

    0 5/5 Brian R. (United States) - See all my reviews, September 21, 2012


  • LIFTMASTER

    Liftmaster 41A3489 Garage Door Opener Carriage

    Home Improvement (LIFTMASTER)

    Rating (28 reviews):
    (4.8/5)
    LIFTMASTER

    Good replacement

    0 3/5 Yuva - See all my reviews Verified Purchase(What's this?) This review is from: Liftmaster 41A3489 Garage Door Opener Carriage was worried about how this would fit considering there were not many pics ... and the model for our gate was pretty old ... its pretty decent ... 0 Help other customers find the most helpful reviews  Was this review helpful to you? , March 3, 2014

    It's the real McCoy

    0 5/5 dennis - See all my reviews Verified Purchase(What's this?) This review is from: Liftmaster 41A3489 Garage Door Opener Carriage Wanted this item for a long, long time. The old one was about 25 years old and I did not know how/where to find a replacement because I have the chain and wire rope system, which is very old, and, it seems, out of production..I got it via Amazon.com, installed it and i works fine. I am very happy with it. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 25, 2014

    Very Fast Shipping--Thanks!

    0 5/5 Robert McEntee - See all my reviews Verified Purchase(What's this?) This review is from: Liftmaster 41A3489 Garage Door Opener Carriage I was impressed how fast this came; I guess they get that when you need one of these, you need it quickly!However, mine wasn't the correct pick; it looked close, but not an exact replacement, so I had to send it back. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , January 1, 2014
    LiftMaster Liftmaster garage door opener complete trolley (carriage) assembly.
    Genuine Liftmaster replacement part.
    Compatible with chain drive operators made by Liftmaster, Chamberlain, Sears, Craftsman, Wayne-Dalton and Master Mechanic.
    For Liftmaster Chain Drive garage door openers from 1984 to present.


  • Liftmaster

    LiftMaster RPM Sensor 41C4398A

    Home Improvement (Liftmaster)

    Rating (9 reviews):
    (4.9/5)
    Liftmaster

    FALSE RPM SENSOR FIVE LED BLINKS

    This one was a easy fix and cost wise . ,Well you know the ending . The troubleshooting tips was dead on ,that would lead me to order this part. However did not finish looking at all symptoms .1. The LED will flash five times if motor is not turning.2. The RPM sensor sees the motor turning via the ,photo cell and fan blade blocking and unblocking photo eye.3. Which then send signal to main logic board to stop all operations . (safety feature to ensure not burning up motor cause of a jam etc...)4. But my motor never came on . Hence the false signal to main logic board . That motor not turning.5. So naturally my first clues was RPM SENSOR CIRCUIT BAD. WRONG!The main logic board will not tell motor to go opposite direction.Wind up buying wrong part.To double check if the RPM sensor bad ,motor will move chain a few inches then main logic board shut attempt down then give you five blinking lights . Now if motor do not not change... 4/5 Rick harris (PALATINE, IL, US) - See all my reviews Verified Purchase(What's this?) This review is from: LiftMaster RPM Sensor 41C4398A This one was a easy fix and cost wise . ,Well you know the ending . The troubleshooting tips was dead on ,that would lead me to order this part. However did not finish looking at all symptoms .1. The LED will flash five times if motor is not turning.2. The RPM sensor sees the motor turning via the ,photo cell and fan blade blocking and unblocking photo eye.3. Which then send signal to main logic board to stop all operations . (safety feature to ensure not burning up motor cause of a jam etc...)4. But my motor never came on . Hence the false signal to main logic board . That motor not turning.5. So naturally my first clues was RPM SENSOR CIRCUIT BAD. WRONG!The main logic board will not tell motor to go opposite direction.Wind up buying wrong part.To double check if the RPM sensor bad ,motor will move chain a few inches then main logic board shut attempt down then give you five blinking lights . Now if motor do not not change... Read more Help other customers find the most helpful reviews  Was this review helpful to you? , November 29, 2011

    Worked great!

    0 5/5 Dean Koopman - See all my reviews Verified Purchase(What's this?) This review is from: LiftMaster RPM Sensor 41C4398A The product worked great, and fixed our problem immediately. It was easy to install, and had everything I needed to repair the unit 0 Help other customers find the most helpful reviews  Was this review helpful to you? , March 30, 2013

    Worked fine

    0 5/5 SA123 - See all my reviews Verified Purchase(What's this?) This review is from: LiftMaster RPM Sensor 41C4398A Purchase for about $12.00 on Amazon. Garage door would open about 8 inches and stop. The troubleshooting guite said it was the lift sensor. Once replaced (about 30 min.), the garage door now works fine. 0 Help other customers find the most helpful reviews  Was this review helpful to you? , February 26, 2013
    For use with all Chamberlain and Liftmaster Group chain and belt drive openers
    For units manufactured from 1984 to the present