The EI30BM60MS is an over-the-range convection microwave with its controls along the bottom edge, where steam from the cooktop rises past them. Keys that act up after cooking often need drying rather than replacing. The vent fan of an EI30BM60MS runs to protect the microwave when the cooktop below gets hot.

The EI30BM55HS is an over-the-range microwave that also ventilates the cooktop. Grease filters underneath should be washed regularly; clogged filters make the vent fan loud and weak. A light under an EI30BM55HS that stays off is often a bulb, replaced from below.

The EI30MH55GS is an over-the-range microwave with a published service manual. When it runs without heating, the service manual’s high-voltage tests separate the magnetron, diode and capacitor. On an EI30MH55GS vented outside, a stuck exhaust damper can let cold drafts in; it is checked along with the fan.

The EI30SM55JS is an IQ-Touch over-the-range microwave with a published wiring diagram. A keypad that works only on some keys points at the membrane or its ribbon connector. We test the keypad matrix on an EI30SM55JS before replacing the control.

The EI30SM35QS is a Q-generation over-the-range microwave. Its door latch hooks engage switches; a door that must be pushed to start cooking has worn hooks or switches. We inspect the latch on an EI30SM35QS that starts only when the door is pressed.

The E30MH65GSS is an Icon over-the-range convection microwave with a technical manual. Convection mode uses an element and fan separate from the microwave system, so each mode is tested on its own. If an E30MH65GSS bakes but will not microwave, the high-voltage section is checked.

The E30MO65GSS is an Icon built-in convection microwave with a service manual and parts catalog. Built-in trims make removal a two-person job, and the unit is slid out on a protected surface. We check door switches first on an E30MO65GSS that does nothing when Start is pressed.

The E30MO75HSS has a drop-down door instead of a side swing, which puts extra load on the hinges and the door switches. A door that no longer closes square on an E30MO75HSS can fail to operate a switch, and the microwave will not start.

The E30MO75HPS is the Professional Series version of the drop-down door built-in convection microwave. Its parts catalog identifies hinge and switch parts by revision. On an E30MO75HPS, the revision letter is read before ordering door parts.

The E30SO75ESS is an Icon high-speed oven that combines microwave and convection heat. A speed-cook mode that underperforms may have one of its two heat sources failing while the other still works. We test microwave-only and convection-only modes separately on an E30SO75ESS.