If your chain is badly corroded you may need to remove the chain from the carriage assembly and soak it in lubricant for a few hours.
How to fix garage door chain.
Once you are clear that the only problem is a slightly loose chain then you can begin fixing the problem.
Garage door didn t open in the morning.
Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand.
Make basic checks first.
If the chain on your garage door is rusty you need to apply lubricant into it to loosen the corrosion.
Ensure that the unit is plugged in the door isn t locked and if you are using a remote that the remote has batteries.
Make sure that the garage door is closed and that you have another way of getting out of the garage.
The reason the chain went off track was because the chain.
Loosen the bolts on the chain pulley that s.
Step 2 turning off the power.
A new front sprocket costs.
Another common cause for a loose chain could be the front sprocket breaking.
Move the ladder to the outer end of the chain arm near the garage door.
Sprocket is at the end of the opener rail closest to the garage door opening.
To do this put some lubricant on a piece of rag this use the rag to wipe the chain.
If in doubt replace the chain completely.
After close examination we found the chain was off track.