Over-the-range microwave above a stainless steel range

Microwave repair in Montgomery & Howard County

A microwave that runs but does not heat usually has a failed magnetron, high-voltage diode or door switch. These parts hold a dangerous charge, so this is not a home repair. AFZ Appliance Repair works on built-in and over-the-range microwaves in Montgomery and Howard County, MD. Call (240) 758-5566.

AFZ Appliance Repair

Serving Montgomery and Howard County

Microwave repair

In business since 2017
30-day warranty
At your home

Call (240) 758-5566

Common microwave problems

What you notice	Usual causes
Runs but does not heat	Magnetron, high-voltage diode, capacitor or a door switch
Sparks inside	Metal in the cavity, peeling interior paint or a burned waveguide cover
Completely dead	Blown internal fuse, a door switch, or no power at the outlet
Turntable does not turn	Turntable motor, coupler or the roller guide
Over-the-range fan or light stopped	Fan motor, relay or a burned bulb socket
Buttons do not respond	Failed membrane keypad or control board

Check these before you call

Heat a cup of water for one minute. Lukewarm water confirms a heating fault.
Remove any foil, twist ties or metal-trimmed dishes.
Clean the waveguide cover, the small panel on the inside wall, if it has food on it.
Do not open the case. The capacitor can hold a dangerous charge even when it is unplugged.

Types of microwaves we repair

Over-the-range microwaves
Built-in microwaves
Microwave drawers
Convection microwaves
Trim-kit microwaves

Microwave repair by brand

We repair over-the-range and built-in microwaves from GE, Whirlpool, Samsung, LG, KitchenAid and Frigidaire, plus Thermador. These units contain a high-voltage capacitor that can stay charged after unplugging, so internal repairs should not be a do-it-yourself job.

Our repairs carry a 30-day warranty on labor and parts. See the full brand list.

Finding the model number

On microwaves, the model and serial number are usually inside the door frame, or on the back on countertop models. Read it to us when you call.

How a repair goes

Call
Tell us the appliance, the brand, what it is doing and your address.
Diagnose
We test it at your home and explain what failed.
Repair
You decide. Completed repairs carry a 30-day warranty on labor and parts.

Common questions

Is it safe to use a microwave with a damaged door?

No. Stop using it if the door is bent, the hinges are loose or the latch does not close firmly.

Is a microwave worth repairing?

Built-in and over-the-range units often are, because replacing them can mean a bracket or cabinet fit. A basic countertop microwave usually is not.

Why does my microwave spark?

Metal in the cavity is the first thing to check. If it is empty, look for chipped interior paint or a burned waveguide cover. Stop using it until it is fixed.

See all appliance repair questions

Helpful guides

See all repair guides

AFZ APPLIANCE REPAIRNOVEMBER 1, 2026

Microwave Runs but Doesn't Heat? Read This First

There are only a few safe checks on a microwave. The parts inside can hold a dangerous charge, so opening the case is not a job to try at home.

White kitchen with a marble island and built-in ovens

AFZ APPLIANCE REPAIRNOVEMBER 1, 2026

Repair or Replace? How to Decide on an Appliance

There is no single right answer. Age, the part that failed and how the machine fits your home all matter.

Microwave repair near you

Choose your community. See every community we serve.

Montgomery County

Apartment-size kitchens around White Oak and Hillandale often rely on one over-the-range microwave for both cooking and ventilation, so a dead vent fan is a bigger problem than it sounds. In Gaithersburg homes around the Kentlands, built-in trim sizes vary, which can make repairing the existing unit the easier path.

Montgomery County communities

Ashton Aspen Hill Barnesville Beallsville Bethesda Boyds Brookeville Burtonsville Cabin John Chevy Chase Clarksburg Cloverly Colesville Damascus Darnestown Derwood Dickerson Fairland Forest Glen Four Corners Gaithersburg Garrett Park Germantown Glen Echo Glenmont Hillandale Kensington Laytonsville Montgomery Village North Bethesda Olney Poolesville Potomac Redland Rockville Sandy Spring Silver Spring Spencerville Takoma Park Washington Grove Wheaton White Oak

Howard County

In Savage and other older Howard County homes, cabinets may not be perfectly square, and a microwave that hangs crooked can bind its door latch. Around Maple Lawn and Fulton, built-in microwaves are often part of a matched set, so repairing one can be simpler than trying to match a replacement.

Howard County communities

Clarksville Columbia Cooksville Dayton Elkridge Ellicott City Fulton Glenelg Glenwood Highland Ilchester Jessup Lisbon Marriottsville North Laurel Savage Scaggsville West Friendship Woodbine