Why does my garage door opener hum but the door does not move? Why does my garage door opener hum but the door does not move? There are several potential reasons for the garage door opener to hum and the door does not move. The trolley may be stuck on the stop bolt or stop tab. There may be stripped gears, a stripped rack, a bad capacitor, or motor. To prevent possible SERIOUS INJURY OR DEATH from electrocution, disconnect ALL electric and battery power (if your opener has the EverCharge standby power) BEFORE performing ANY service or maintenance. To resolve humming issues for a chain or belt drive If the garage door opener hums twice: Check the trolley and ensure it is not stuck on the stop bolt or stop tab. See How do I get the trolley off the stop bolt or stop tab? Remove the metal cover and inspect the capacitor. Look for oil or swelling, these are telltale signs of a failed capacitor. If the capacitor is replaced and the humming has not been resolved, replace the motor.
If the garage door opener hums for about 30 seconds: Ensure the door is connected to the garage door opener. Use the emergency release handle to reconnect the door. See How can I disconnect the garage door opener to manually open or close my garage door? Check the belt or chain to be sure it has not fallen off the sprocket. After re-installing the chain or belt back on to the sprocket, ensure to check your owners manual on setting the tension to the chain or belt. If the belt/chain is connected properly, remove the metal coverto inspect the gears. If you see white plastic shavings inside the unit, or the gears appear to be worn or stripped, replace the gears. If the garage door opener is a screw drive, check for a stripped rack. It is a small black piece that runs up and down the screw. If it appears to be worn out even a little, replace the rack. If the garage door opener hums until unplugged, the receiver logic board is damaged and must be replaced. If this is a new installation, verify that the correct bolts are used to mount the rail to the chassis.
If longer bolts are used, they will interfere with the operation of the motor. Make sure you are using the bolts that came already installed on the chassis. The bolts are black in color, not silver. To resolve humming issues for jackshaft operators (3800/8500) If motor hums for 1 to 2 seconds, the door may be disengaged. Pull on the red emergency cord, then try opening door manually. If motor hums for more than 2 seconds, the collar may be slipping on the jackshaft. Tighten all 6 screws on the collar then try operating the door again. For further assistance on the 3800/8500, check the LED indicator light for diagnostic codes. How do I get the trolley off the stop bolt or stop tab? Belt and Chain Drive Gear and Sprocket Kit Replacement Instructions Why do the garage door opener lights turn off when the garage door opens? GDO - How to resolve issues with an out of phase chain/belt drive opener Why does my chain/belt drive garage door opener run in the wrong direction?
Chamberlain 1/2 hp garage door motor hums but nothing moves.... Chamberlain 1/2 hp garage door motor hums but nothing moves. It is about 12 yrs old. Is there a repair I can do or is it time to replace? Is it a hum or a motor that is running but not driving stripped gears.http://www.diyforums.net/changing-gear/shaft-assembly-on-chain-drive-opener-184.html sounds like a motor running but not driving anything Did you open the link I included ?? yes, printing it out and going to work on it.I will reply again in a couple minutes.There is so much white plastic shavings. there is no droop in the chain. So it looks like I need to replace the shaft and gear assembly. I had the same problem. My garage door was in open position, when I press the button to close it, all I hear was hum noise for 2 seconds. What I found out the problem is the metal piece (Trolley) that door arm attach to was in contact with the stop screw on the rail. In Chamberlain manual that piece is called Trolley.
Door Arm is attahced to Trolley and can be released from Trolley by pulling the rope. There is a big screw on the rail that stops trolley from going further towards the opener housing. You should leave some space between the screw and trolley. Once I made the adjust, it works. I have a photo but I cannot post it here. You just solved my problem. Thanks for saving my $$ & time! Just thought i'd add to the success stories as this ended up being my exact issue as well. The trolley had gotten stuck against the bolt, i had actually had to gently tap on it with a flat head screwdriver and mallet before it would start moving again but after making the neccessary adjustments we're back in business. Thanks for the useful info, so glad it didn't end up being a logic board. Thanks that worked for us too. Worked like a charm. A malfunctioning garage door opener can leave you in the cold. Having an automatic door opener in your garage is a great convenience, but you have to give the opener and all its parts regular maintenance, or it can flummox you with erratic behavior.
One such quirk is a refusal to open the door as commanded: When this happens, you could get locked out of the garage. This can indicate a problem with the motor, but it might have other causes, including a bent, misaligned or loose track or sensors that are dirty or out of alignment. Motor problems often require professional help. Make basic checks first. Ensure that the unit is plugged in, the door isn't locked and, if you are using a remote, that the remote has batteries. Check the breaker controlling the door opener, and reset if it it's tripped. You should also ensure that the door is engaged with the trolley. Someone might have pulled the emergency cord. Disengage the door from the trolley by pulling the emergency cord if none of the basic checks reveals a simple explanation for why the door won't open. Try to open the door manually. If it won't move, look for a bent or loose track or a bent roller. Any defective part you find will have to be repaired or replaced. It may also help to spray lubricant on the door rollers.
Press the remote or the wall-mounted start switch, listen to the motor and watch the movement of the chain. If the motor hums, but the chain doesn't move, that indicates a problem with the motor. If the motor works but the chain doesn't move, the chain sprocket may need servicing. If nothing happens at all, the safety sensors may be out of alignment. You should see a steady light on both of them, which indicates that they are aligned and working properly. If one or both lights are off or flashing, look for dirt, cobwebs or leaves in front of the sensor lenses, and clean the lens if necessary. If the lights still flash, manually realign them until the light is steady. This may involve tightening one or both of the vertical door tracks with a screwdriver or wrench. Try the door again after servicing the sensors. If nothing happens when you press the start switch, there may be an electrical disconnection inside the motor casing or in the house circuitry. Look inside the motor for loose wires.