LM8500 Wall Controller Failure.
- Thread starter Dakota00
- Start date
No problem. I was poking around for electrical requirements on the site and saw that. Good luck let’s hope this is the silver bullet.
Vintage Veloce
Well-known member
Can you post the rest of that document please? It looks very interesting!
gnpenning
Well-known member
I've posted the all pertinent information to help our community here that I can.
Rod N
Well-known member
US customers only.
Isn’t that a kick in the ******* head.
Isn’t that a kick in the ******* head.
cajunfirehawk
Well-known member
Another thanks for posting this!
Here is the direct link:
https://support.chamberlaingroup.com/s/article/Product-Warranty-Alert-888LM-8500-8500C-and-MYQPCK
I have two spares... plus the one on my door... both defective....
looking for a pebble 4766 or any 47xx pebble hinged handle
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slodat
ALLIANCE MEMBER
I have four that need replaced. Website says one per customer.
I will call them and see what they say...
looking for a pebble 4766 or any 47xx pebble hinged handle
seems like I have to talk to them anyway, I placed the order online and there is a problem, the order isn't showing up and I didn't get an email confirmation.
also said my code has been used when I tried it again
also said my code has been used when I tried it again
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428PI
Well-known member
I got my code for the free controller. Of course, their plans are to sell you other products which I did at the tune of 85 bucks or so. Got another remote and a outside keyed pad which I always wanted. I was surprised that no questions where asked on the 888LM controller.
wssix99
Well-known member
Was that picture from a dealer bulletin on the units? If so, can you post the whole thing or did you only get a print copy?
biggziff
Well-known member
I ordered 2 and had no issues
wssix99
Well-known member
Their coupon is cute, but doesn't make us whole if we have more than one door. ... Or if we are in Canada. (This looks to be as close to a recall as this can get without being a recall. I'd expect Canadian dealers have a companion program. Perhaps the US-only thing is only for the coupon?)
biggziff
Well-known member
Here's the link to the information. You have to generate a code for each order. They are not reusable.
https://support.chamberlaingroup.com/s/article/Product-Warranty-Alert-888LM-8500-8500C-and-MYQPCK
https://support.chamberlaingroup.com/s/article/Product-Warranty-Alert-888LM-8500-8500C-and-MYQPCK
slodat
ALLIANCE MEMBER
The website wants a credit card. So, I called their 800 number. They were awesome. Four control panels on their way.
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gnpenning
Well-known member
See post 365.
Vintage Veloce
Well-known member
I just called liftmaster. I have three doors, and told them I had been unplugging the door openers every night to prevent any chance of this problem causing the opening any of the doors. They easily agreed to replace the controllers.
They told me to use the coupon code from their website for one door, and they warranty replaced the other two.
For the website, I did have to supply my credit card number, but there was no charge. For the warranty replacements, I had to provide the opener serial numbers and manufacturing dates, which required my getting a ladder to read those under the front hatch on the openers. I recommend getting those numbers before you call!
Hopefully I'll get all three new wall controllers in a week or so!
They told me to use the coupon code from their website for one door, and they warranty replaced the other two.
For the website, I did have to supply my credit card number, but there was no charge. For the warranty replacements, I had to provide the opener serial numbers and manufacturing dates, which required my getting a ladder to read those under the front hatch on the openers. I recommend getting those numbers before you call!
Hopefully I'll get all three new wall controllers in a week or so!
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you guys got lucky, the person I got, told me since I don't have an issue that they can diagnose they cannot send me one. even put me on hold to ask their manager, so I have to wait till it fails or pay for a new one?
I am going to try get another code, but it had been giving me the same code
I am going to try get another code, but it had been giving me the same code
gnpenning
Well-known member
Have you tried the coupon?
With liftmaster tech support don't get excited if you get a dud, call back later.
I called and they would only provide me with one... not cool since i bought two spares...
looking for a pebble 4766 or any 47xx pebble hinged handle
cspcrx
Well-known member
This is great news. I just got a new one to upgrade another door so I could monitor it. I believe it had a production date after Sept 1st. I will go check. I know my other controller is dated 5/15 so I would love to replace that unit before it fails.
Thank you for posting.
Thank you for posting.
I've been keeping track of this thread for a while, and finally made the move to replace my 888LM controller (dated 10/15). The process to replace it was quick and easy - as noted above, they request a credit card number, but didn't charge it.
Thank you to everyone who contributed.
Thank you to everyone who contributed.
graffix000
Well-known member
Thanks for posting this. My replacement is on the way from using the coupon code.
cspcrx
Well-known member
So I looked at the unit I just got last week and it says 9/18 but does not have the sticker. Does that mean I should get a replacement for it?
wssix99
Well-known member
If you call the number and talk to a human, they can replace multiple controls under warranty.
My second set (replaced after my originals started with the phantom opening problem) just recently started acting up with un-commanded light activations. So, this info is right on time.
Liftmaster asked that I replace one with the coupon and then they swapped my other two controls under a warranty claim.
gnpenning
Well-known member
Yes.
Vintage Veloce
Well-known member
I'm just hoping these latest "blue dot" units actually fix the "open upon failure" problem...
cspcrx
Well-known member
Thanks, requesting a second coupon now.
gnpenning
Well-known member
This is a good point. There have been other fixes along the way that haven't been successful. The main difference I've seen this time are things like the coupon and the way they have been handling things are different from our side. I've had a unit on the shelf that I refused to sell due to issues with these units. I will be getting a new controller for it and putting it on one of my own doors that doesn't have a opener. The *fixes* in the past haven't given me that much confidence that they would work. Hopefully this is the one.
Vintage Veloce
Well-known member
I would feel better about it is they stated the problem that these units fix! I'm guessing the documentation you found doesn't say much more...
"We have resolved the loss of function affecting some of our LiftMaster 888LM Control Panels." I wish it would clearly say that if/when it fails it will leave the doors closed and locked now...
I would prefer, now they don't fail or leave the door opened......
looking for a pebble 4766 or any 47xx pebble hinged handle
Vintage Veloce
Well-known member
So say we all!
But all electronics eventually fail. Liftmaster/Chamberlain might actually consider it a positive benefit that the door opens when the unit fails, and it could be a design requirement! I can imagine the manufacturer thinks the controlled door might be the only entry to a garage, and failure could result in being locked out: so they make it so that a failure will open the door. I personally don't agree with that, for security reasons.
I really wish we knew more about how they think the opener should work.
Vintage Veloce
Well-known member
Just received my three replacement units. Here are some pictures, including some shots of the front and back of the PCB. It looks to be a newer revision, but there are no obvious component changes. However, lots of things could be very different that would be hard to see. (Ignore the damaged/disabled beeper on the old unit, I don't know how that happened.)
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cspcrx
Well-known member
I noticed on the LM website they now have an 889LM. Seems to have the exact same features specs as the 888LM. Since the ratings on the 888 are so bad looks like they want to start fresh. Curious if this new one we are getting is actually the 889LM. Oddly its $5 more.
I think the reason it fails open is probably lack of a pull down or pull up resistor, due to oversight in design. So when the capacitor goes bad it lacks a "default" value (voltage high or low). Just my guess. Electronic design is similar to programming logic in software, sometimes we forget to give initial value and create a bug. Except unlike software, you don't just change the code and upload a patch, you have to rev the board, send it out to get the PCB printed and layout again, a costly process.
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