A:Answer Hi Max - We certainly appreciate your loyalty! Some microwaves had the marketing name XL1800 printed on the control panel which indicated the cavity size (1.8 cubic feet- XL1800: JVM1840, JVM1841, JVM1842, JVM1850, JVM1851, JVM1860, JVM1861, JVM1870, JVM1871). All GE 30" over-the-range microwaves are approximately the same width, and are designed to fit into a 30" wide cabinet opening. Therefore, any of our 30" over-the-range models will work as a replacement for your existing 30" over-the-range XL 1800 model. Comparable models are GE Profile™ 2.1 Cu. Ft. Over-the-Range Sensor Microwave Oven Model #:PVM9215SKSS and
GE® 1.9 Cu. Ft. Over-the-Range Sensor Microwave Oven
Model #: JVM7195SKSS. Keep in touch at GEAppliances.com. Sue