Common Causes of Sparking
Damaged Waveguide Cover
The mica/waveguide cover protects internal components from food splatter — if it's burnt or damaged, sparking is common.
Metal Object Inside
Metal utensils, twist ties, or foil accidentally left inside will spark immediately when microwaved.
Food/Grease Buildup
Carbonized food residue on interior walls can conduct and spark similarly to metal.
Worn Turntable Support
Less common — a damaged support ring can occasionally cause arcing.
What To Check Before Calling a Technician
Two quick, safe checks you can do yourself:
- Look for a metal object — check thoroughly for any utensils, foil, or metal-rimmed containers
- Inspect the waveguide cover (the small mica/ceramic panel usually on a side or back wall) — if it's visibly burnt, cracked, or has holes, that's likely the cause
If neither applies, the cause needs a proper internal inspection — don't keep testing by running the microwave repeatedly, as this risks further damage.
Microwave Sparking? Get It Checked Safely.
Searching for microwave repair near me in Mumbai? Same-day diagnosis — we identify the exact cause before any repair.
Is the Waveguide Cover Replacement Expensive?
No — it's actually one of the more affordable microwave repairs. The mistake to avoid is ignoring the sparking and continuing to use the microwave, which can damage the magnetron and turn an affordable fix into an expensive one.
Is This Covered Under Warranty?
If your microwave is still under company warranty, this is typically covered. If the warranty has expired, an independent repair with genuine parts is usually fast and affordable — waveguide covers are inexpensive parts to replace.
Searching "Microwave Repair Near Me"? We Cover All of Mumbai
This is diagnosed and fixed the same way regardless of which part of Mumbai you're in: