If the door only moves a few inches and stops the rpm sensor could be bad.
Garage door doesn t move.
If it has remove it and try opening the door again.
How to fix a chain drive garage door when it won t open 1.
Open and close the garage door manually to see how easily it moves on the tracks.
Believe it or not people panic and become frazzled without.
It is possible that something has.
Check the garage door springs to see if they have.
Replace the main gear drive if the garage door opener makes a grinding noise but the door doesn t move your main drive gear is probably toast.
Check each spring to make sure that it isn t damaged and is set in the right spot.
Check to see if the trolley has been disconnected.
The springs need to be put in a certain way so that they continue to work and allow the door to move up and down and catch it smoothly.
When one spring is working and another isn t it may cause the garage door to hum without moving.
The motor will run but will not move the chain.
The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor.
It sounds very obvious but when you re in a rush and trying to leave.
Firstly check that the garage door isn t locked.
If the door still won t open and the motor unit still displays the code then a bent garage door track or a door latch that s stuck or locked may be preventing the door from moving.
Motor hums but garage door does not move by mike the door man on in the door man s blog if you currently have installed in your home a electric garage door opener manufactured by chamberlain but private labeled or marketed by sears craftsman liftmaster chamberlain and tru value in the last 20 years you might of experienced this problem.
Garage door opener won t open all the way fix.
Ensure that the unit is plugged in the door isn t locked and if you are using a remote.
A broken belt or chain and cable assembly could also prevent the door from moving when the motor runs.
Check to determine whether the garage door is locked or not.
If the motor runs but doesn t move the door you may need to replace the gear and sprocket assembly or the drive and worm gears.
Make basic checks first.
Most garage doors have an emergency release typically a red pull cord that allows the door to be opened and closed manually.
Disengage the door from the trolley by pulling the emergency cord if none of the basic checks reveals a simple.
Pull the emergency release rope to disconnect the garage door from the trolley.
When the cord is pulled the motor is disengaged from the chain.
Check that nothing has fallen into the garage door track.