The track is not aligned properly.
Liftmaster garage door opener broken sprocket.
4 7 out of 5 stars 184 ratings.
Common reasons your garage door opener may not be working properly.
Liftmaster garage door openers 25a18 sprocket coupling visit the liftmaster store.
The springs are broken.
This is the part that connects the motor to the chain or belt.
5 0 out of 5 stars moderately easy and definitely cheap fix for broken sprocket.
The garage door s path may be blocked.
The gear and sprocket assembly dri.
The door needs lubrication.
These door openers are perfect for adding an extra remote to multi car and family situations or just to replace lost or broken garage door openers.
The safety sensors are out of alignment.
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We also offer a full range of complete garage door opener systems from brands such as genie and liftmaster.
After several years the garage door springs become weaker causing more stress on this particular part causing it to fail and wear out.
This video from sears partsdirect shows how to replace the gear and sprocket assembly on a chain drive garage door opener.