1979 Anderson sliding patio door
I'm sorry for the confusion but I'm not sure what difference you're pointing out. It sounds like you may be referring to the spindle that engages with the slot in the mortise lock, which is shown in your photos and looks like it would function the same way as our replacement parts do. The lock on the outside of the door, such as our 82-316 or 82-317, does not have a spindle but rather a slotted opening as shown below. Is that the part that you're referring to?
Or do I need a new modern lock and latch? Thanks, Martin.
That is very interesting and not a setup that I have seen in this type of Andersen patio door hardware. I suspect that our parts may still work for you as long as you replace the latch and lock but I'm going to have one of our senior experts take a look and see if they agree. We'll reach out to you as soon as more information is available.
As Casey mentioned, the newer style Andersen lock sets have a long spindle that goes from the inside turn lever through the mortise latch and into the keyhole in the exterior key cylinder. These would be our best replacement options but you would need to replace both the inside latch and external lock for the parts to engage properly. Take a look at the related videos for more information on how these parts should install. If you run into any problems, our return policy can be found here.
