Magnetron
Makes the microwaves that heat food. When it fails, the microwave runs but doesn't cook.
Built-In and Over-the-Range Microwaves
Same-Day Microwave Repair in Pacifica, CA
A microwave that hums but won't heat, or sparks every time you use it, is more than a hassle. If you're searching for microwave repair near me, our Pacifica technicians fix over-the-range, built-in and drawer microwaves, often the same day. Sparking or burning smells are an emergency, and our phone line is open 24 hours.
- Over-the-range microwaves
- Built-in and wall combo units
- Microwave drawers
- Convection and speed ovens
High-Voltage TrainedSafe magnetron and diode work
Vent and Light RepairOver-the-range fans fixed
Honest AdviceWe say when replacing is cheaper
Written WarrantyParts and labor covered
Common Microwave Problems
Signs Your Microwave Needs Repair
Microwaves look simple, but inside they use very high voltage to cook. These are the problems we see most often.
Runs but food stays cold
Sparks or flashes inside
Display is completely dark
Turntable won't spin
Stops when you touch the door
Buttons or touchpad don't respond
Loud humming or buzzing
Vent fan or light stopped working
What We Fix
Microwave Parts We Repair
Here are the parts behind most microwave breakdowns. Many of them carry high voltage and should only be tested by a pro.
High-Voltage Diode and Capacitor
Power the magnetron. A failed diode is one of the most common no-heat causes.
Door Switches and Latch
Make sure the microwave can't run with the door open. A bad switch can blow the main fuse.
Turntable Motor and Coupler
Spin the glass tray for even cooking. A worn motor leaves cold spots.
Waveguide Cover
A small panel inside that protects the magnetron. Grease buildup on it can cause sparks.
Vent Fan, Light and Controls
On over-the-range units, the fan and light serve your cooktop. Touch boards control everything.
Safety First
Why Microwave Repair Is Not a DIY Job
Microwaves are one of the few home appliances that can be dangerous even when unplugged. Here's why we always recommend a trained technician.
- The capacitor stores a strong charge that can stay inside long after the plug is pulled.
- Door seals keep energy inside. A bent door, broken hinge or damaged seal should be checked before you keep using it.
- Built-in units are heavy and mounted above the cooktop, so removing them takes two people and the right brackets.
What you can safely do
- Check the breaker and outlet.
- Clean the inside, including the waveguide cover, with a damp cloth.
- Make sure the tray and roller ring are seated right.
- Remove any metal before running it.
Sparks or Smoke?
Emergency Microwave Repair
Sparking, smoke or a burning smell from a microwave means stop using it right now.
Stop and Unplug
Press stop, open the door and unplug the microwave if you can reach the plug. For built-in units, turn off the breaker.
Keep the Door Closed if Burning
If something is on fire inside, keep the door shut and let it burn out. Call 911 if the fire spreads.
Call for a Safe Repair
Call (650) 491-1179 any time, day or night. More on our emergency appliance repair page.
Microwaves We Repair
Every Type of Home Microwave
Not every microwave is worth the same repair. Here's how we think about each type.
Over-the-range microwaves
Mounted above your stove with a built-in fan and light. Worth repairing for most problems.
Built-in and wall combo microwaves
Set into cabinets or above a wall oven with a trim kit. Replacing them often means matching the exact size, so repair is usually the smart choice.
Microwave drawers
Pull-out units built under the counter. Drawer motors, tracks and touch controls are common repairs.
Convection and speed microwaves
Combine microwave power with a heating element and fan. These need both sides tested.
Countertop microwaves
We'll check it if you'd like, but we'll be honest when buying new costs less than fixing.
Microwave Problem Guide
| Symptom | Likely Cause |
|---|---|
| Runs, no heat | Magnetron, diode or capacitor |
| Sparking inside | Metal, dirty waveguide cover or chipped paint |
| Totally dead | Blown fuse from a bad door switch |
| Turntable stuck | Turntable motor or coupler |
| Keypad not working | Touch membrane or control board |
| Loud hum | Failing magnetron or fan motor |
Cleaning tip
Heat a bowl of water with lemon slices for 3 minutes, then wipe the inside. Steam loosens grease, including on the waveguide cover, which helps prevent sparks.
Service Areas
Microwave Repair Near You
We repair microwaves in every Pacifica neighborhood, from Manor to Sharp Park, and in these nearby cities.
If your town isn't listed, call us. We cover a wide area.
View All Service AreasRelated Services
Related Cooking Services
Other kitchen appliances we repair alongside microwaves.
Microwave Repair Warranty
Every microwave repair includes our written warranty on parts and labor. If the same problem returns during the warranty period, we come back and fix it at no extra charge.
Keep Exploring
More Help With Microwave Repair
Guides, related repairs and nearby cities picked for microwave repair customers.
FAQs
Microwave Repair FAQs
Why is my microwave running but not heating food?
When the light, fan and turntable all work but food stays cold, the high-voltage system has usually failed. That includes the magnetron, high-voltage diode, capacitor or a door switch. These parts carry dangerous voltage, so this repair is for a trained technician.
Why is my microwave sparking inside?
Sparks often come from metal in the microwave, like foil, twist ties or dishes with metal trim. If nothing metal is inside, the waveguide cover (a small panel on the inside wall) may be dirty or burnt, or the paint inside may be chipped. Stop using it until it's checked.
Is it safe to open my microwave to fix it myself?
No. A microwave's capacitor can hold a deadly electric charge even when it's unplugged. Leave internal repairs to a trained technician. You can safely clean it, replace the light bulb on some models and check the outlet.
Why did my microwave stop working completely?
If the display is dark, first check the breaker and outlet. A dead microwave often has a blown internal fuse, which is usually caused by a failing door switch. We replace both so the fuse doesn't blow again.
Should I repair or replace my microwave?
For a basic countertop model, replacing is often cheaper, and we'll tell you so. For over-the-range, built-in and drawer microwaves, repair is usually worth it because they cost more and need installation.
Why won't my microwave turntable spin?
Check that the glass tray and roller ring are seated correctly. If they are, the turntable motor or the small coupler under the tray has likely failed. It's a quick, low-cost fix.
Do you fix the fan and light on over-the-range microwaves?
Yes. The vent fan and cooktop light on an over-the-range microwave are part of this service. If you have a separate hood above your stove, see our range hood repair page.
Get Your Microwave Heating Again
Skip the cold leftovers. Call our Pacifica microwave repair team for safe, same-day service, or request a visit online. See all appliance repair services, visit the homepage, or read tips on our blog.