Hotpoint RVM5160DHWW 1.6 cu ft Over-the-Range Microwave with 1000 Watts and Sensor Cooking MECH-ARCING Error Fix: Sparking or Arcing Inside Cavity

Error code MECH-ARCING on the Hotpoint RVM5160DHWW 1.6 cu ft Over-the-Range Microwave with 1000 Watts and Sensor Cooking means: Sparking or Arcing Inside Cavity. Visible sparks or arcing occurs inside the microwave during operation — the most common cause is a damaged waveguide cover (mica sheet), a thin rectangular cardboard-like sheet mounted on the inside wall of the microwave cavity; food splatter can burn onto the waveguide cover surface, creating a carbon spot that causes localized arcing; the mica sheet can be easily removed, cleaned, or replaced ($5-10 part); other causes include metal objects or metallic-trimmed dishes left inside, peeling interior paint that exposes bare metal, or a failing magnetron; arcing can damage the cavity walls if left unaddressed — tiny burn holes in the cavity wall require professional evaluation

The most successful fix is "Replace the Magnetron or Inspect for Interior Damage" (hard difficulty, ~90 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace the Magnetron or Inspect for Interior Damage") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Insulated screwdriver.

DIY cost: $10-$20. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

The Hotpoint RVM5160DHWW 1.6 cu ft Over-the-Range Microwave with 1000 Watts and Sensor Cooking has 8 other known error codes, including: F1 (Oven Cavity Thermistor Open Circuit), F2 (Oven Cavity Thermistor Shorted), F3 (Shorted Touch Pad — Stuck Key Detected), F4 (Humidity Sensor Open Circuit), MECH-FAN (Exhaust Fan Not Working or Always Running on High), and 3 more.