how do i tell the difference between surface and face mount

A quick learner from New Jersey says:
i going to order 39-393 operator. don't know which one to get.
hte crank handle is good but it won't close or open all the way i get a clicking sound
felis
Profile picture of Jasmine
Jasmine from SWISCO responded:

Thanks for posting! Given that window will not open or close and you are getting the clicking sound, it is likely there is something wrong with the gears on the inside of the operator. 

To confirm the best possible replacement, I'll need to see a photo of your entire casement operator. It would be best to see the operator removed.

Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.