I used this option today to enable a jackshaft opener to be used with a door that has low headroom track. Bypassing the tension monitor was the only way around it. Thanks for making this video! 🙏
Thanks man used is today to help install on a low headroom track where I couldn’t of used the tension sensor…knew there had to be way around by passing it…thanks super helpful! Appreciate it!
Does doing this affect the functionality of the safety reversal system? Like the test where you put a 2x4 under the door and close it. Chamberlain is very particular about testing it when changes are made.
Great video Jeff! I do not have experience with soldering, but you mentioned another option to bypass cable monitor. You said to remove the cover and black round leg that sticks out will come off. Okay I am with you so far. Then you are left with the remaining piece which I agree is not that attractive. But you're saying all then I have to do is put that piece on the wall and everything will be fine and there will be no problems with cable slack and door going up and down? If I did not want to put that piece on wall, could I set it on top of opener as a location on its side? Thanks
As long as the limit switch isn't made up, the system will operate. So in theory, what you could do is remove the limit switch from the bracket and hide it where ever you'd like. You could test this by hooking the unit up and operating the switch just to verify.
@@BellyUpFishGarage I am catching on to what you are saying. I think I will start with removing the cover and setting on top of opener unit on its side. I will also have the sensors and control button sitting on top of opener also. The door is 8 feet tall so it will be hard to see the parts sitting on top of unit. I will be installing Chamberlain RJO70 this weekend but is same unit as Lift Master 8500. My only concern is the cable tension monitor was designed to be a safety feature. I would not want the door to come crashing down on a human or vehicle but it is hard to envision a problem with cable slack and you have been going strong for 10 months. Thanks for ideas, I will let you know how things turn out.
@@BellyUpFishGarage Everything turned out great. I decided to not install the battery backup so I used that compartment to house the remaining cable tension monitor piece and just left the control button uninstalled since I will velcro the remote to the wall. Thanks again Jeff!
What were the symptoms that led you to bypass the tension sensor? My neighbor has a problem where his door will open or close partially and then stop. His cottage is a couple hundred miles away and I'll be going with him to troubleshoot this weekend. Thanks for the video, it explains the guts of the sensor quite well.
I had read comment after comment on the internet about people having issues with it, and other comments talking about how it really doesn’t do anything helpful, so I took a chance and removed it.
@@BellyUpFishGarage Thanks. It seems the problem could also be with the absolute encoder (travel module). I'll go after the cable tension monitor first since that's easy to do.
Any idea what the power rating is on the 1k Ohm resistor used in the Cable Tension Monitor device - eg .25W, .5W, 1W etc? If the correct resistor power rating were known one could simply install the correct 1k Ohm resistor with bent legs into the cable connectors on the motor unit that accept the Cable Monitor Sensor wires.
Further research looking at the resistor installed on the PCB in my Cable Tension Monitor… The resistor used in the monitor power circuit is BRN/BLK/RED/GLD on tan body = 1k Ohm 0.25W 5% tolerance. 100pcs of this resistor can be had for $6.00 on AMZN. Trim and bend the two legs of the correct resistor and insert each leg into the monitor wires connectors on the motor unit - polarity orientation doesn’t matter. Viola! Troublesome Cable Tension Monitor problem solved!
@@BellyUpFishGarage thank you for the reply and glad to hear that! I may need to try this since the cable tension monitor is not allowing me to bring my door up high enough to fit my truck in the garage!!
I have two of these of these units and hate them both. Only 3 years old and nothing but issues. Now I’ve got cable tension issues. I’m going to bypass it like you did. One question, instead of doing the soldering, couldn’t you just cut the wires going to the unit real short, strip them and then insert them in the unit like you did with the soldered short legs?
@caseycarver3272 Yeh, if I understand what you’re describing correctly, yes, I think that would work. You just need that resistor in there and it’ll function fine.
The problem is that Liftmaster tried to develop a sidemount product for a (home owner) standard radius door, when a side mount has no business being on a standard radius door. Liftmaster should have ditched the cable tension monitor and replaced it with a pair of spring pushers. There is very limited gravitational bias on a garage door with standard radius track, to favor the downward motion. If you have a standard radius door, just get a darn trolley style door opener. It will save you money in the long term, I promise.
Sure. The cable tension monitor is also working as a reversing device in the event of an obstruction. That obstruction could be a pet, elderly person, automobile etc.@@BellyUpFishGarage
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I used this option today to enable a jackshaft opener to be used with a door that has low headroom track. Bypassing the tension monitor was the only way around it. Thanks for making this video! 🙏
Thanks for the Super! That’s the first one I’ve gotten.
I’m glad the video was helpful!
@@BellyUpFishGarage Cheers 🍻
Thanks man used is today to help install on a low headroom track where I couldn’t of used the tension sensor…knew there had to be way around by passing it…thanks super helpful! Appreciate it!
Does doing this affect the functionality of the safety reversal system? Like the test where you put a 2x4 under the door and close it. Chamberlain is very particular about testing it when changes are made.
No, it has no effect on that system. The door will still reverse if it tries to squish a child.
All it does is remove the slack cable detection.
Awesome! Thanks! Making the mod when I get home
Thanks for this. My garage has been doing this a couple times now. I took the piece off and garage has been closing like new
Great video Jeff! I do not have experience with soldering, but you mentioned another option to bypass cable monitor. You said to remove the cover and black round leg that sticks out will come off. Okay I am with you so far. Then you are left with the remaining piece which I agree is not that attractive.
But you're saying all then I have to do is put that piece on the wall and everything will be fine and there will be no problems with cable slack and door going up and down?
If I did not want to put that piece on wall, could I set it on top of opener as a location on its side? Thanks
As long as the limit switch isn't made up, the system will operate.
So in theory, what you could do is remove the limit switch from the bracket and hide it where ever you'd like.
You could test this by hooking the unit up and operating the switch just to verify.
@@BellyUpFishGarage I am catching on to what you are saying. I think I will start with removing the cover and setting on top of opener unit on its side. I will also have the sensors and control button sitting on top of opener also. The door is 8 feet tall so it will be hard to see the parts sitting on top of unit. I will be installing Chamberlain RJO70 this weekend but is same unit as Lift Master 8500. My only concern is the cable tension monitor was designed to be a safety feature. I would not want the door to come crashing down on a human or vehicle but it is hard to envision a problem with cable slack and you have been going strong for 10 months. Thanks for ideas, I will let you know how things turn out.
Good luck!
@@BellyUpFishGarage Everything turned out great. I decided to not install the battery backup so I used that compartment to house the remaining cable tension monitor piece and just left the control button uninstalled since I will velcro the remote to the wall. Thanks again Jeff!
@@JohnKosmerl-de2qr Sure thing. Random question, where did you pick up my first name? LOL
What were the symptoms that led you to bypass the tension sensor? My neighbor has a problem where his door will open or close partially and then stop. His cottage is a couple hundred miles away and I'll be going with him to troubleshoot this weekend. Thanks for the video, it explains the guts of the sensor quite well.
I had read comment after comment on the internet about people having issues with it, and other comments talking about how it really doesn’t do anything helpful, so I took a chance and removed it.
@@BellyUpFishGarage Thanks. It seems the problem could also be with the absolute encoder (travel module). I'll go after the cable tension monitor first since that's easy to do.
Do you need the resistor or can you just use wire?
You need the resistor.
Thanks just what I was looking for
What size is the resister?
Thx
1k ohm.
Any idea what the power rating is on the 1k Ohm resistor used in the Cable Tension Monitor device - eg .25W, .5W, 1W etc?
If the correct resistor power rating were known one could simply install the correct 1k Ohm resistor with bent legs into the cable connectors on the motor unit that accept the Cable Monitor Sensor wires.
You're not wrong. I just didn't have any spare 1k ohm resistors laying around, so I used what I had. :)
Further research looking at the resistor installed on the PCB in my Cable Tension Monitor…
The resistor used in the monitor power circuit is BRN/BLK/RED/GLD on tan body = 1k Ohm 0.25W 5% tolerance.
100pcs of this resistor can be had for $6.00 on AMZN.
Trim and bend the two legs of the correct resistor and insert each leg into the monitor wires connectors on the motor unit - polarity orientation doesn’t matter.
Viola!
Troublesome Cable Tension Monitor problem solved!
@@batchjs Excellent. Nice work man!
Is this still working well since you posted this video? Have you had the drum unspool or any other complications?
Still working like a champ. I don’t want to jinx myself, but no issues thus far.
@@BellyUpFishGarage thank you for the reply and glad to hear that! I may need to try this since the cable tension monitor is not allowing me to bring my door up high enough to fit my truck in the garage!!
@@gregdiede4532 Good luck with it! Hope it works out for you.
I have two of these of these units and hate them both. Only 3 years old and nothing but issues. Now I’ve got cable tension issues. I’m going to bypass it like you did. One question, instead of doing the soldering, couldn’t you just cut the wires going to the unit real short, strip them and then insert them in the unit like you did with the soldered short legs?
@caseycarver3272 Yeh, if I understand what you’re describing correctly, yes, I think that would work.
You just need that resistor in there and it’ll function fine.
Nice! Cant wait to get out there and see if i can fix mine now!
Good luck!
The problem is that Liftmaster tried to develop a sidemount product for a (home owner) standard radius door, when a side mount has no business being on a standard radius door. Liftmaster should have ditched the cable tension monitor and replaced it with a pair of spring pushers. There is very limited gravitational bias on a garage door with standard radius track, to favor the downward motion. If you have a standard radius door, just get a darn trolley style door opener. It will save you money in the long term, I promise.
Or, you could bypass their band aid. ;)
Not worth a lawsuit when you can install a trolley.@@BellyUpFishGarage
@@5eyes1294 A lawsuit?
Sure. The cable tension monitor is also working as a reversing device in the event of an obstruction. That obstruction could be a pet, elderly person, automobile etc.@@BellyUpFishGarage