MAYTAG OVEN SHOWING A F9 CODE. I PRESS THE CLEAR BUTTON, AND A FEW SECONDS LETTER THE CODE APPEARS AGAIN. WHAT IS CAUSING THIS CODE. OVEN WAS USED EARLIER AND HEATED JUST FINE.

So F9 would explain why your door latch isn't unlocking since F9 means your door latch has failed to move. Ok so it sounds like your door latch may have failed.

it MAY be your oven door lock is jammed..
I found this information for you:
1

Wait at least one hour after the oven has completed a self clean cycle to attempt to open the oven door, as the oven remains locked until the interior temperature has cooled sufficiently.

2

Press "Cancel" and wait a few minutes if the oven is cool and wait until at least one hour has elapsed since the completion of a self-clean cycle.

3

Open the oven door and check the door lock switch. Move the switch back and forth with your fingers to return the switch to the original position. Check for dirt or debris that may be causing the switch to stick or lock and clean as necessary.

4

Contact an authorized service technician if the problem is not resolved, as the door switch may need to be replaced.

Perhaps you can get some advice from Maytag

Call the dealer from whom your appliance was purchased or call Maytag Appliances Sales Company, Maytag Customer Assistance at 1-800-688-9900

F9-2 error code indicates:

1. Door latch motor failure/jammed. Latch motor switch failure.
2. Oven control software failure, or component failure(stuck relay).
3. Wiring problem.

• Press the clear key.
• If the Clear key does not eliminate the problem, turn off the power to the range for 30 seconds, then turn the power back on.
• It is most likely to have a failed or misaligned door lock switch.

F9 Door Lock Warning Check door lock circuit or Replace Clock. If clock working don't do that.
ck here for the code.
https://www.repairclinic.com/RepairHelp/FaultCodes/31/Range-Stove-Oven

parts here....
https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Range-Stove-Oven/19-4-93082-/new/Maytag-Oven-not-self-cleaning-MER5770AAW
you can call their 800# or use the chat for more info if needed.
first check that the latch is not a 1/4 or so closed.
open and close the latch a few times.
also you can turn off the breaker for a few minutes
and see if it resets the ecm.
Hope this helps a little

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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To reset door latch, press "cancel" to clear F9 code. Depress and hold oven door light switch (plunger style on door frame). Latch should reset.

I waited until the next morning and hit the cancel button. It cleared the error

try to hold in on the oven light switch plunger that the door would hit if it was closed properly. what you probably did was to pull the door open while it was trying to lock. once you hold the plunger in, then hit the clean cycle again and then push to cancel button to get the door latch to unlock the door. it may take a minute or two but that should clear up the error code and let you use the oven again.
next time if you push the clean by mistake, just let it go and then when it says "locked" just push the cancel button. it will unlock and be ready to use.

What a scam by service personnel.
-Simply press "Stop/Clear", then gently push the door handle until "Lock" appears on the screen. Press "Stop/Clear" again and the door unlocks itself!
J. Kalicak

Try unplugging the oven from the electrical power. May release the lock, which is held in place by a tiny micro switch. If not and while the electric is still off or the oven is unplugged, use a bright light flashlight to look through the slot where the lock is in the oven, not in the door.

You may be able to use a thin blade screwdriver to move the lock to the release position. Check the angle of the lever. A slightly bent lever handle also can cause this type of condition.

If all else fails, remove the access panel on the front of the oven to access the locking device and release it. May have to disconnect the wires to the lock which will allow door to function but not during any self cleaning modes.

Generic:
Fault Code Interpretation Components To Check
F-1 Communication error between touch pad and ERC (clock)
Replace the touch pad or clock.
F-2 Oven temperature sensed by electronic control Replace the clock/relay board
F-3 Open oven sensor or harness. Replace the oven sensor
F-4 Shorted oven sensor or harness Replace the oven sensor
F-5 Power to element relay disabled in cook mode Replace the clock/relay board
F-7 Shorted touch pad key sensed for 32 secs. Replace the touch pad/control panel
F-8 Shorted meat probe Replace the probe jack.
F-9 Door lock safety circuit on ERC sensed Replace the door latch assembly
F-C or F-0 Communication error between boards Replace the relay board

Maytag-Maycop-Magic Chef-Jennair-Admiral: Oven Fault Codes:
F0 Function key shorted or stuck button Clean and unstick button or replace Touch Pad or Clock
F1 Defective Touch Pad or Membrane Replace Touch Pad or Membrane
F2 Oven over heat defective Relay Board or (if present) or defective Sensor
F3 Oven Sensor Open Replace Sensor
F4 Shorted wire or Sensor locate short and correct it or replace Sensor
F5 Hardware, safety circuits disagree Replace Clock
F6 Missing AC (power) signal Check for proper voltage (plug, breaker, etc.)
F7 Function key shorted or stuck button Clean and unstick button or replace Touch Pad or Clock
F8 A/D Warning Replace Clock
F9 Door Lock Warning Check door lock circuit or Replace Clock