Error code · Range

Frigidaire Range Code F66: Control Power Supply Failure

High · stop use, call now

Code: F66
Appliance: Range
Brand: Frigidaire
Warranty: 30-day workmanship

What F66 means

On Frigidaire ranges with later electronic oven controls, F66 means the control's own internal power supply has failed. That supply feeds the control's low-voltage circuits, so when it drops out the display and keys can go dead or the oven can stop. You may see F66 at power-up or after a power flicker, with the oven unable to start. It is a control power problem, not an oven heat problem.

Common causes of F66

The control's internal power supply
The incoming power to the control
Connections to the control that have loosened

✓ One safe check you can try

1. Turn the range off and wait a moment. 2. Remove power at the plug or breaker for 30 seconds, then reconnect. 3. See whether the display comes back normally and the keys respond. 4. Leave the control panel closed, and do not open the back.

! Why to stop there

F66 sits in the control, so after the reset we ask whether it returns on every power-up.
We check the incoming supply and the connections before judging the control.
A written price comes first, and we say plainly if an older range is not worth a new control.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Range codes

F93Frigidaire Range F93: Door Lock Took Too Long F94Frigidaire Range Code F94: Too Many Door Lock Attempts F95Frigidaire Slide-In Range F95: Door Motor Will Not Stop LockFrigidaire Oven Message "Lock": Oven Lock Is On Sb (showroom)Frigidaire Range Code Sb: Showroom Mode F92Frigidaire Range Code F92: Oven Door Left Open Too Long F64Frigidaire Range Code F64: Power Frequency Not Detected F65Frigidaire Range F65: Keyboard Short or Control Failure

F66F66 questions

Does F66 mean the control is dead?

It means the control's own power supply is not holding. If it comes back after a reset and stays away, the control may be fine, and we would simply watch it.

Can a power flicker cause F66?

Yes, a flicker or a short outage can trigger it once. A repeat tells us the supply on the control is the real question, and we test it.

Do you replace controls on older ranges?

Yes, when it is worth it, and we tell you plainly if it is not. You see a written price first, so you can decide whether to go ahead.

Book a visit

Still seeing F66?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 844-8518