Try making small adjustments.
Garage door opener has chain slap.
T his is a pretty uncommon problem but one that can happen after you ve first installed your garage door opener.
It s important to get this switch at just the right distance from the motor so that the door is able to close all the way but the motor also knows to stop running.
Chain drive garage door opener uses a metal chain to open the garage door.
Types of garage door openers.
You should also ensure that the door is engaged with the trolley.
This garage door opener works by moving gears and metal parts together.
Thankfully garage door manufacturers have included a part in their designs that can help you tighten your chain and stop the chain from slapping against the rail as it opens and closes your garage.
This is related to the up limit switch.
These are widely used since they are affordable and easily available.
Check the breaker controlling the door opener and reset if it it s tripped.
Reliable and powerful liftmaster chain drive garage door openers are built to handle heavy and frequently used doors with ease day in and day out.
Someone might have pulled the emergency cord.