F6 Serious Hard — consider a tech

Frigidaire Microwave F6 — Line voltage / power supply fault

Frigidaire Microwave · Error code F6

What F6 Means

F6 indicates the control board sees AC line voltage out of spec or a power-supply problem on the board itself. Often appears after a brownout or surge.

Symptoms

  • F6 on display
  • Display flickers
  • Random reboots
  • Appears after power outage or storm

Common Causes

1
Low or unstable house voltage

Voltage sagging below ~108 VAC trips the fault.

2
Failed control board power supply

On-board regulator or capacitors degraded.

3
Loose neutral or hot connection at outlet

Backstabbed receptacle or burnt terminal.

How to Fix It

  1. Unplug for 5 minutes and retry.
  2. Measure the outlet voltage under load — should be 114–126 VAC.
  3. If voltage is low, address the circuit/breaker; do not assume the microwave is at fault.
  4. If voltage is fine and F6 persists, replace the control board.
  5. Have an electrician check the outlet if voltage is unstable.

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.

Common replacement Frigidaire microwave control board View on Amazon→

More Frigidaire Microwave Codes

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All Frigidaire codes → All microwave codes →

Verified against manufacturer documentation: frigidaire.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.