The reason the chain went off track was because the chain.
How to repair garage door chain.
To do this open and close.
Pull the chain off the motor unit sprocket and out of the chain spreader.
Step 1 diagnose the problem.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley from the opener carriage.
Step 2 clean the chain.
Garage door didn t open in the morning.
Move the ladder to the outer end of the chain arm near the garage door.
Loosen the bolts on the chain pulley that s.
How to repair a broken garage door opener chain.
How to fix a garage door chain drive sprocket 1.
How to put a chain back on an automatic garage door opener.
Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
Before you do any repairs you need to know what is wrong with your door opener chain.
After close examination we found the chain was off track.
Pull down the trolley cord to release the trolley from the chain arm and lower the door by hand.
How to fix a chain drive garage door when it won t open.
If you are not confident in your ability to diagnose the problem call a local garage door service company.
Your chain drive garage door opener is tasked with operating the largest moving part in your entire home with this type of responsibility you want to make sure that the opener will work consistently without any problems.
Press the wall control button or remote so that the opener completes its close.
Step 4 reconnect the motor.
A new front sprocket costs about 150 200 include the labor to install it.
Having an automatic door opener in your garage is a great convenience but you have to give the opener and all its parts regular.
Step 3 fix the carriage assembly.
Sprocket is at the end of the opener rail closest to the garage door opening.