Power Failure Came Up on Screen and Oven is locked and will not o

Is there any letters that it is displaying on the LCD screen? If so it could be in lock mode or display mode.
Locate the "Cancel" and "Cook & Hold" buttons on the oven's control panel.
Hold down "Cancel" then hold "Cook & Hold" with another finger for three seconds. Both buttons must be held together.
Wait three seconds; the display will change from "OFF" to "LOCK" and the door will seal.
Repeat these instructions to unlock the door. The door lock cannot be activated if the oven is in use.

pf = power failure look for breaker or power supply

Hello. You have an open rear oven thermostat causing the complete power failure of your unit. The part numbers you need are W10176670 for the upgraded blower and 9759243 for the thermostat. You will have to remove the oven from the wall in order to remove the back covers to access the thermostat and blower. The blower has been upgraded from 950cfm of airflow to 1200cfm. I have performed this service flash--you will definitely need a helper or 2 in order to pull the oven out and work on it. There is a service bulletin on your oven describing this exact situation. When you replace the thermostat and blower, re-mount the oven and then restore power, the oven will function and unlock. The link for the thermostat is here:
Thermal Overload Safety Thermostat

The link for the blower is here:
http://www.appliancepartspros.com/whirlpool-blower-w10176670-ap4369539.html

If you are hesitant about performing the repair yourself, definitely call for service. I hope this helps you!

PF is power failed
power shut off .
should be able to hit cancel or enter button
then set your clock should function after that .
If not we need more info Like model # off appliance
Brand name . you may need a main board

"PF" stands for Power Failure. There should be a reset procedure in your user's manual. I cannot specify this since you don't give the manufacturer or model number of your oven.

Hi,

PF stands for power failure, just hit cancel and reset clock.

Good Luck, I hope this helped.

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

Here is what the manual for your oven says about control lock.

Let me know if you have questions.

Control Lock
The Control Lock shuts down the control panel pads to prevent
unintended use of the oven(s). The Control Lock will remain set
after a power failure, if set before the power failure. The only time
it is not available is during the Sabbath Mode or Self-Clean cycle.
When the control is locked, only the TIMER SET · START, TIMER
CANCEL, OVEN LIGHT and CANCEL OFF, UPPER OVEN
CANCEL / OFF or LOWER OVEN CANCEL / OFF pads will
function. On double oven models, CLOCK SET · START will also
function.
The Control Lock is preset unlocked, but can be locked.
To Lock/Unlock Control: Press and hold CONTROL LOCK for
about 3 seconds, until “CONTROL LOCK” and a picture of a lock
appear on the display. Repeat to unlock and remove “CONTROL
LOCK” from the display.

The F9 code indicates there is a problem with the door lock.

Try disconnecting the power to the range for 10 seconds and reconnecting. Open the oven door and hold the door switch plunger in while you try these things. Put the control into clean for 5 minutes then cancel clean. You must hold the door switch plunger in for the 5 minutes.

Try canceling the clean cycle without putting the control into clean.



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My oven was locked and would not open. No lock light was on but the oven was clearly locked. F9 error when I hit certain buttons.

Try this. I unplugged the oven for about 5 minutes. Plugged back in. A LOCK light came on. Held down "Oven Cancel" for a few seconds. Door opened and lock light went off. No more F9 error when I hit those buttons.

F5 - E1 and E2 Check door/latch switch Replace switch if defective
It has detected a problem with the switch on the door lock motor. In most cases the switch will need to be replaced.