The instructions for programming the self clean cycle in a typical GE Monogram oven are shown in the image below. Here is a link for the owner's manual on one model of GE Monogram oven:
GE Monogram Oven ZET1R and ZET2R Owner's Manual
. This may be the information that you need if you have that type of GE Monogram oven. There are several different models. If you have a different type of control on your oven, reply with additional details and the full model number of your oven.
You can cancel that cycle by pressing the Clear/Off or Cancel button. The oven door may not open until the oven cools if it has already heated past a certain point.