Microwave Sparking Inside
Whatever badge is on the door, this fault comes down to a short list of specific, repairable causes. Here is what they are, what you can check before calling, and where to find the version written for your brand.
Common Causes
Sea-level orifices that were never converted
Less oxygen for combustion means an unconverted appliance runs rich — yellow-tipping, sooting and slow recovery that all read as a failing valve.
A dirty or misaligned igniter
Debris or grease buildup prevents a clean spark, which is the single most common cause of ignition failure.
A faulty gas valve or regulator
Controls gas flow to the burner and can fail independently of the igniter.
Microwave Sparking Inside, Brand by Brand
The causes above hold across the board, but the layout, the part numbers and the diagnostic sequence differ by manufacturer. We have written this fault up separately for 4 brands — pick yours for the version specific to that microwave.
What You Can Check Yourself
Parts That Most Likely Need Replacing
These are the components our technicians check first on a symptom like this. The exact part depends on your make, model and what we find during diagnosis.
In and around Wheat Ridge
Wheat Ridge — The old 'Carnation City' greenhouse belt converted to suburb in the 1950s-60s, leaving ranch homes on unusually large lots with mature trees; largely built out today. We also cover Lakewood, Morrison, Arvada across West Metro.
ZIP codes we cover in Wheat Ridge: 80033, 80212, 80214, 80215
Do not leave this one. Running the appliance in this state is what turns a single-component repair into a larger one, and on anything involving water or gas it is also the point where the cost stops being about the appliance. Our repair service covers same-day diagnosis and a flat-rate quote before any work begins.
Common Questions About Microwave Sparking Inside
Does this mean the same thing on every brand?
Can I keep using it while this is happening?
How much does this repair typically cost?
Do you work on brands not listed above?
Do you offer a warranty on the repair?
Do you cover my part of Denver?
Still stuck on this one?
Same-day appointments across Denver.
*Elite Appliance Repair Denver is an independent repair company. We are not affiliated with, authorized by, endorsed by or sponsored by Sub-Zero, Inc., Wolf Appliance, Inc., Viking Range, LLC, BSH Home Appliances (Thermador, Bosch, Gaggenau) or any other manufacturer named on this site, nor by any of their distributors. All brand names and trademarks are the property of their respective owners and are used here only to describe the appliances we service. We are not a factory service provider and specialize exclusively in out-of-warranty appliance repairs.