These types also experience the same symptoms as the standard glass door locks.
Change sliding glass door lock.
They are often used in higher end doors because steel mortise locks are more secure than the cast aluminum alloy versions used in many patio doors.
Try applying lubricant such as a petroleum based oil or wd 40 in the area to see if that works.
Sliding glass door locks such as the steel mortise style locks shown on this page are used in wood vinyl and aluminum patio doors.
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Prime line s selection of replacement mortise locks for sliding glass doors.
Step 2 remove the latch body.
Sliding glass door locks.
Sometimes the sliding door may have a latch that works by sliding a small notch up and down.