How Is a Garage Door Fault Diagnosed?
A garage door fault should be diagnosed by checking the connected components that could produce the symptom rather than assuming the first visible problem is the complete cause.
The inspection can begin with how the door behaves: whether it is heavy, crooked, noisy, stuck, reversing or failing to respond.
What May Be Checked?
Door position and movement
Door balance
Springs and cables
Tracks and rollers
Automatic opener
Controls and safety systems
Checking the door mechanically before blaming the opener helps distinguish a genuine motor or control fault from an opener that is reacting to excessive weight or resistance elsewhere in the garage door system.