Garage door wont close, Stops and Reverses, Voltage Test.

My garage door is not working correctly and closing only when I’m holding the control button down. When I release it, the door stops and reverses, and won’t close. The garage light flashes 10 times. How to troubleshoot voltage, and fix garage opener safety sensors if there is no orange and green light on LiftMaster by Chamberlain. If the green light is blinking, align sensors or remove any obstructions.

[@user-kf7li2uo5t]

Best video I have seen on this subject. Mainly due to the accurate description of the normal voltage that should be seen for this circuit. 6 vdc. Nowhere else did anyone give this spec. Yes the transformer in the unit is 24 vac. That has nothing to do with this safety circuit. Thank you for giving me the answers I looked hours to get. I can finally assume my logic board is Ok.

[@Your-Self]

Glad it helped!

[@boliu8149]

Thanks. Finally SOMEONE actually said what the DC voltage should be. The sensors must communicate back to the main unit via RF....very very helpfull

[@Your-Self]

Glad it helped!

[@romanykemp9042]

Thanks. Finally SOMEONE actually said what the DC voltage should be. The sensors must communicate back to the main unit via RF...

[@Your-Self]

Thanks for watching!

[@timeandplace4114]

Thank you. Thank You and KZbin. I am 78 and with your excellent instructions and information I fixed my garage door problem and learned how to avoid future problems. I am so proud of myself and thankful to my mother that taught me to "try before paying you might learn something for a lifetime". I subscribed and will share with family and friends. I like your handle "YOURSELF" 🙂

[@Your-Self]

Great job! I'm proud of you too :)

[@jackedwards3515]

@@Your-Self I also had the same problem also older guy 81 and am equally proud of both the excellent video as well as being able not only correct this problem, but to also keep the derbis and other objects clear and the lights properly adjusted. Thank You!!

[@jim5148]

Thanks a lot for the video! This is the only place in the universe that states the actual voltage supplied to the photocell circuit.

[@Your-Self]

LOL, glad it helped!

[@skudapa]

It saved my day, not able to fix my garage with the same problem, on my way back I searched for the solution , I found this video, took u turn and it worked perfectly

[@Your-Self]

Good to hear it!

[@davyrwhite]

Sensor out of alignment, as well. Thanks for going through the troubleshooting steps back to the power source. A lot more help than the manual or the online chatbot. Thanks for this!

[@Your-Self]

Glad it helped

[@patcassidy5997]

Good explanation. Only video I've seen showing the voltage needed to operate sensors.

[@Your-Self]

Good to hear it!

[@barbeerw]

Thank you! My door was closing most of the way then reversing. I didn’t realize (or remember, in case I already knew it) about the light flashing code. Mine was flashing ten times, like you mentioned. There wasn’t any obvious obstruction between the two door sensors but the green one was flashing intermittently. Turns out that the garage door insulation that I installed years ago was puffing out just enough to be detected by the sensor. I pushed it in and problem solved. I’ve added some Tyvek tape to help prevent it from bulging back out again. Thanks again for steering me in the right direction!

[@Your-Self]

Good to hear all is good!

[@kuduman123]

Great guidance. Clear and concise. Worked for me - one sensor (receiver) was out of alignment. Thanks!!

[@Your-Self]

Glad it helped!

[@DaBIGTOE33]

did not know where to start diagnosing a garage door since ive never done it, gonna give this a try thank you!

[@Your-Self]

Good luck!

[@jeromepancoast3435]

Your video was very helpful. I needed the voltage at the sensors and I could NOT find it on any other video. Much easier to know the voltage and not have to remove the sensors and run jumper wires to the back of the motor unit.

[@Your-Self]

Glad it helped

[@antonioamado7813]

Nice video sir!

[@itsagodideakingdomtalk_1015]

Great video. Helped me find the issue. Thanks 😊

[@brushenas]

That was great. you saved my day. Thank you very much. I cleaned the sensors and it is closing properly now.

[@Your-Self]

Glad it helped

[@marcmora6496]

Thanks for the tips! Helped me diagnose my issue and opener now functions properly.

[@Your-Self]

Great to hear!

[@squirrelattackspidy]

My door goes down to about a foot of closing and then reverses direction. Going to go through your troubleshooting tips. Thank you for the detailed explanation!

[@Your-Self]

Good luck!

[@jamesbolt7090]

Very good video. Thank you. Clear and concise.

[@Your-Self]

Glad it was helpful!

[@numba1chikacazh]

Thank you! Your video helped me today with sensor issue!

[@Your-Self]

Great to hear!

[@chopperwatts7016]

Your tutorial solved my problem. Many thanks.

[@Your-Self]

Good to hear it.

[@myutube1960]

Excellent video & very good explanation. Thank you for sharing!

[@Your-Self]

Glad it was helpful!

[@mailnaresh1263]

Ensuring the sensors are in line fixed it. Thank you for the explanation :)

[@Your-Self]

Glad it helped

[@brandonscydick8590]

Thank you for your video. I had a loose connection at the wire to the motor. I reconnected it and it fixed the issue

[@Your-Self]

Excellent!

[@Marcangel159]

Thank you so so so much it reallly helped I fixed my garage and I subscribe as well thank you so much man

[@Your-Self]

Good to hear it!

[@LEONARDOSAUL76]

Thank you thank you. Worked excellent video

[@Your-Self]

Glad it helped

[@ljdag5371]

Thanks. Seems like it is the cable for me. Was giving -1. But at the garage opener it was 14 or 16.

[@synthesizerisking2886]

DANG, this is a good video!!!! Thank You😊😊😊😊

[@Your-Self]

Thanks for watching!

[@synthesizerisking2886]

Nothing worked, I think it is a wire pulley or door issue. I have to get a pro to come fix it.

[@markaggie1]

Thank you very informative video I was able to fix mine as it was a broken wire to one of the sensors.

[@Your-Self]

Good to hear it!

[@flyinghorsedrone5376]

Great explanation!

[@Your-Self]

Glad it was helpful!

[@rkannan6]

Good comprehensive video. Probably too detailed for low info whiners like Sara Abernathy. Sara, I suggest sitting on the pointed end of the broom instead of complaining.

[@Your-Self]

Thanks for watching!

[@jwd_789]

My sensors were aligned, door still not closing unless I pressed the button and held it down. Eventually I sprayed lube on the rails and wheels, and that fixed it 👍🏻

[@vibeboii1119]

Garage door: no, i wanna stay open!

[@markschirripa3607]

Thanks for the video. Cold weather seems to affect my door's ability to close with the remote. Have you any thoughts on this?

[@freddyramirez6545]

Thank you so much it was the sensor for me it was aiming high

[@Your-Self]

Glad it helped

[@jessychrisnan8859]

Does the amber and green light should be visible when door is closed or open? Because ours didnt show but we can open from keypad and hold the keypad to close it.

[@Your-Self]

Yes, both lights should always be visible. They act as safety sensors for the door, so it doesn't accidentally crush someone. But when you hold the keypad, you basically override the safety sensors, so the door can close while you watch. Try to wiggle wires going into those sensors. Maybe it's just a loose connection.

[@tomprovan6817]

I have 6 volts at the unit 6 volts at both sensors and with new sensors still the door comes down and then goes back up after it reaches about 1 ft from the top any more ideas

[@Your-Self]

If the door is capable of closing all the way down while you hold the button, the problem comes back to the sensors. Maybe they are slightly misaligned or become misaligned when the door starts to move. Maybe the main control board is going bad. Not sure what else.

[@pe8954]

Other videos will show you the up/down screws which set how far it travels. Start there but, my issue was resolved by increasing the down force which was a small purple colored dial on my liftmaster. Now my door stops bouncing from 1-2" off the ground and will close all the way

[@gizmo8814]

My garage door sensor orange and green light does grow steadily, but still can't close the door. Only closing all the way down while I keep holding the button. Please help. Thanks.

[@Your-Self]

Try observing the lights (if they start blinking or go dark) while the door is closing. Maybe the rail is warped/loose, so the sensors move during closing and lose contact with each other.

[@gizmo8814]

@@Your-Self It worked, thank you!!!

[@patklinedinst751]

My handheld garage door opener won’t work after I change the battery

[@Your-Self]

Make sure it's the correct battery replacement type, and that it's not installed upside down.

[@marylamb6063]

Mine wouldn't close because the lenses were dirty. I cleaned them with a wet rag and it started working again.

[@Your-Self]

Good to hear it!

[@DakillaChi]

On the wires that go to the sensor each has 2 is one for power and other ? Or what

[@Your-Self]

These sensors use DC (direct current) voltage. That means one wire is positive and the other is negative to complete the circuit. But if you mean 2 wires going to the same terminal, they are the same... either positive or negative. Those wires are very thin. So the installers probably wanted to make them thicker by combining 2 wires together.

[@DakillaChi]

Yes so each sensor has 2 thin wires glued together and tie up when entering in back of the overhead motor

[@DakillaChi]

I’m getting no light at the sensors but looks like there is power on both and the motor is giving 6v at the top

[@DakillaChi]

Just can’t see if there a wire that messed up above the door without taking out drywall

[@Your-Self]

If you have 6 V at both sensors but they don't light up, you probably need to replace the sensors... not the wiring.

[@randybaker3864]

Can you

[@saraabernathy4302]

Use that broom to clean those corners

[@johnmilner7603]

Don’t use pliers or the plastic will crack.

[@hamradiotimes5586]

Rats problem ate wiring