I have 34 year old Anderson casement windows and several are having crank issues. Several crank handles are slipping particularly during closing. I bought from you and installed a couple of cranks and some complete controllers, but I'm still having problems. Even the crank handles on the new controllers are slipping. Might I ordered the wrong size. The old and new look identical. One of my order numbers is 1240410. Jeff
Tom from SWISCO responded:
July 25, 2019
Thanks for contacting us, Jeff, and for your patience during this busy summer.
Your operators look very similar to our 39-146 and 39-147, which are also Andersen brand. I think these are a promising place to start, but let me know what you think.