Kenmore Elite 72188503800 microwave/hood combo Parts

For Kenmore Elite microwave/hood combo model 72188503800, plan on a standard 30-inch over-the-range footprint: it fits a minimum 30-inch cabinet opening and mounts at least 30 inches above the cooking surface. For exact exterior dimensions in inches, use the 72188503800 installation guide.

What we can confirm for this model

The installation instructions for model 72188503800 (and closely related 721.88502/721.88503/721.88509) specify key fit requirements that determine “how big” the unit is in real-world installs:

• Minimum cabinet opening width: 30 inches
• Minimum height above cooktop to top of mounting plate: 30 inches
• Designed for use above ranges up to 36 inches wide
• Requires solid mounting into wall studs (typical stud spacing is 16 inches)

Typical outside size you should expect (planning numbers)

Most 30-inch over-the-range microwave/hood combos are approximately this size:

Measurement	Typical range (inches)	What it affects
Width	29 7/8 to 30	Cabinet opening and alignment
Height	16 to 17 1/4	Clearance to upper cabinet
Depth	15 to 17	How far it projects over the range

How to measure your microwave correctly

Use these steps so you get the right “in inches” numbers for a replacement or cabinet check:

• Measure overall width across the front trim.
• Measure overall height from the bottom edge to the top.
• Measure overall depth from the back (wall side) to the front face (exclude the door handle if you are matching cabinet depth).
• Confirm your cabinet opening is at least 30 inches wide.
• Confirm the unit will sit at least 30 inches above the cooking surface per the install requirements.

Why it matters

Over-the-range microwaves are sized around cabinet openings and safe clearances. Using the model-specific install requirements prevents cabinet interference, poor vent alignment, and unsafe mounting.

Last updated: February 2026

To reset your Kenmore Elite microwave model 72188503800, we recommend doing a simple control reset first: press STOP/CLEAR to cancel any active cooking or timer function, then restore power by unplugging the unit (or switching the breaker off) for about 1 minute and powering it back on. Use the 72188503800 owner's manual for the exact control steps and menu options.

Quick reset options (start here)

• Press STOP/CLEAR once to stop cooking.
• Press STOP/CLEAR again to clear the display and cancel a previous operation.
• If the microwave will not respond, unplug it (or turn the circuit breaker off) for about 60 seconds, then restore power.
• If the display is locked, press and hold START for 3 seconds to toggle Child lock.
• If the unit will not start because the timer is running, cancel the timer using the KITCHEN TIMER pad and the dial.

If the controls seem “frozen”

A “frozen” keypad is usually one of these conditions:

Symptom	Most common cause	What to do
Buttons do nothing	Child lock is on	Hold START for 3 seconds
Time counts down but no heating	Timer mode is active	Cancel KITCHEN TIMER
Won’t start a cook cycle	Door not fully latched	Open and firmly close the door
Random behavior after outage	Control needs a power reset	Unplug or cycle breaker for 1 minute

Why it matters

Resetting clears stuck commands and restores normal control logic after a power glitch. It also helps you quickly rule out simple issues (like Child lock or an active kitchen timer) before you spend time troubleshooting parts.

When a reset is not enough

If the microwave powers on but still will not run, check these basics next:

• Confirm the outlet has power and the cord is fully seated.
• Check the home breaker or fuse.
• Make sure you press START after selecting a cook function.
• If the unit is completely dead, a blown internal fuse is possible; see how to replace a microwave fuse for the safe, step-by-step approach.

Last updated: February 2026

To unlock the keypad on your Kenmore Elite microwave/hood combo model 72188503800, press and hold START for 3 seconds. This turns off the Child Lock (control lock) so the microwave can be started normally; repeat the same step to lock it again.

Quick unlock steps (model 72188503800)

• Make sure the door is fully closed.
• Press and hold START for 3 seconds.
• Watch the display; the lock indicator clears when the controls are unlocked.
• Test by pressing a number pad or starting a short cook cycle.
• To re-lock, press and hold START for 3 seconds again.

If it still will not unlock

These checks fix most “keypad locked” complaints on over-the-range Kenmore microwaves.

• Tap Stop/Clear once, then try the START (3 seconds) unlock again.
• Confirm you are holding the pad continuously (a quick press will not toggle the lock).
• Power reset: unplug the microwave (or switch off the breaker) for 1 minute, then restore power and retry.
• If the display responds but keys do not, inspect the door closing and latching; a door that does not close cleanly can prevent normal operation.
• If the unit is completely dead (no display), check the home outlet and breaker first; internal fuse or control issues require service.

Why it matters

The Child Lock is designed to prevent accidental starts and unwanted vent or light operation. Unlocking it restores normal keypad control so you can set cook time, power level, and use features like the dial control.

Helpful reference

Feature	What it does	How to toggle
Child Lock (control lock)	Prevents the microwave from being started accidentally	Hold START 3 seconds
Stop/Clear	Stops an active function and clears entries	Press once

For the exact button layout and lock instructions for this model, use the 72188503800 owner’s manual.

Last updated: February 2026

Kenmore Elite microwave/hood combos like model 72188503800 most often have problems related to power and safety cutoffs (microwave will not run), heating performance (counts down but doesn’t cook), and door-latch sensing. Many issues trace back to a thermostat, control board, or door interlock switch, plus basic power supply problems.

Most common symptoms we see

• Microwave display is blank or nothing works (no power)
• Microwave won’t start even though the display works
• Runs but does not heat food properly
• Stops mid-cycle or seems to “shut off” during cooking
• Door won’t latch or acts like it’s open when it’s closed

Quick checks you can do first (no tools)

These are the same types of checks called out in the troubleshooting section of the 72188503800 owner’s manual.

• Confirm the cord is fully plugged into a grounded 3-prong outlet
• Check the home breaker or replace a blown household fuse
• Make sure the door is firmly closed and latched
• Press START (a missed START press is more common than you’d think)
• Press STOP/CLEAR to cancel a previous cooking program that may still be active

Parts that commonly cause these problems

If the basic checks don’t fix it, these parts are frequent culprits on this model:

Symptom	Common part involved	Example part for 72188503800
Won’t start, acts like door is open	Door interlock circuit	Microwave door interlock switch 3B73361E
Dead or intermittent operation	Line protection	Us pressed steel microwave fuse 3B74133Q
Runs but doesn’t heat	High-voltage system	Microwave magnetron 6324W1A001L

Why it matters

A microwave that won’t run is often a simple power, door-latch, or fuse issue; a microwave that runs but doesn’t heat points to the high-voltage heating system (magnetron, diode, capacitor). Those heating components can store dangerous electrical energy even when unplugged, so we treat “no heat” repairs as technician-level work.

Last updated: February 2026

On the Kenmore Elite microwave/hood combo model 72188503800, the internal microwave fuse is typically mounted on or near the noise filter / power input area behind the control panel or upper grille area. Use the 72188503800 installation guide to confirm access points and safe power shutoff before any inspection.

What to check first (before you open anything)

• Make sure the door is fully closed and latched.
• Confirm the outlet has power by testing a small appliance.
• Check the home breaker and the home fuse (if your home uses fuses).
• Unplug the microwave for 60 seconds, then plug it back in.
• If the display is dead, focus on power supply issues first.

Where the fuse is usually located

Most over-the-range microwave/hood combos place the fuse:

• Behind the top vent grille (after removing mounting screws)
• Near where the power cord enters the unit (line filter area)
• In a small fuse holder or clipped to a bracket near the control compartment

If your microwave is completely dead, a blown internal fuse is a common cause, but it is often triggered by another issue (door switch problem, shorted high-voltage component, or wiring fault).

Parts commonly involved when a fuse blows

If the fuse is blown, these related parts are often checked by a technician:

Symptom	Common related area	Example part for this model
Dead display, no response	Fuse or door interlock circuit	Us pressed steel microwave fuse 3B74133Q
Blows fuse when door shuts/starts	Door interlock switches	Microwave door interlock switch 3B73361E
Runs but does not heat	High-voltage circuit	High-voltage diode 6021W3B001V

Why it matters

The fuse protects the microwave from overcurrent. Replacing a fuse without correcting the underlying cause can lead to repeat failures and can damage the control board or wiring.

Last updated: February 2026