Maytag · Microwave Serious
F8E2 — Magnetron / High-Voltage Fault
Control has detected an abnormal current draw from the high-voltage circuit — typically a shorted magnetron, HV diode, or capacitor.
- Keep using it?
- Limited use only
- DIY difficulty
- Hard
- Verified against
- maytag.com ↗
How to fix it
- WARNING: HV capacitor stores lethal charge. Qualified technicians only.
- Unplug, wait 5 minutes, and discharge the HV capacitor with an insulated screwdriver.
- Visually inspect HV components for burn marks, bulging, or arcing damage.
- Test HV diode with a high-voltage-capable meter or 9V battery + multimeter — should conduct one direction only.
- Test HV capacitor with a capacitance meter and check for short to case.
- Test magnetron filament continuity and short-to-case.
- Replace any failed component; on diode failures, replace the diode AND inspect magnetron.
- Test heating with a cup of water for 60 seconds.
Why it happens
Typical signs: F8E2 mid-cycle, often shortly after start · Loud humming followed by code · No heat or partial heat · Tripped breaker
- Shorted high-voltage diode HV diode failed shorted, causing excessive current draw.
- Failed high-voltage capacitor Capacitor internal short pulls excessive line current.
- Failed magnetron Magnetron internal short between filament and anode.
- Burnt HV transformer Transformer winding shorted.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Maytag microwave codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: maytag.com.